Oct 31, 2020 - POLYMERS -Class Notes, Chemistry, Class 12, CBSE, NCERT Class 12 Notes | EduRev is made by best teachers of Class 12. The close packing results in high densities, tensile strength and high melting and boiling points. Here we have given detailed notes on Polymers, Classification of Polymers for the students, especially of Class 12. Classification of Polymers Based on Source of Origin. Condensation polymerisation which occurs in a stepwise manner with elimination of some smaller molecules like H2O, NH3, HCI, ROH, etc., is concerned with step growth polymerisation, e.g., adipic acid and hexamethylenediamine phenol and formaldehyde etc., undergo step Growth Polymerisation. (а) Linear polymers: They consists of long and straight chains, e.g., high density polythene and PVC. polythene. a) In chain-reaction polymerization. e.g.. ASS rubber is a copolymer of acrylonitrile, buta-1, 3-diene and styrene. It is a chapter which is purely conceptual with a lot of emphasis in theory. which means many units (parts). The process of heating a mixture of raw rubber and sulphur at 373 K to 415 K is known as vulcanisation of rubber. Candidates who are ambitious to qualify the Class 12 with good score can check this article for Notes. The word polymer has a Greek origin. It is used for making rain coats, toys, electrical insulation. These are expected to be quite hard, rigid and brittle. A few ‘crosslinks’ are introduced in between the chains, which help the polymer … Class 12 Chemistry Polymers: Types of Polymerization Reactions: Types of Polymerization Reactions. 5. NCERT Solutions For Class 12 Chemistry Chapter 15 Polymers September 25, 2020 by phani Topics and Subtopics in NCERT Solutions for Class 12 Chemistry Chapter 15 Polymers : NCERT Solutions for Class 12 Chemistry Chapter 6 – Polymers. The only intermolecular forces are van der Waals’ type. Classification of Polymers Based on Structure. A macromolecule mayor may not contain monomer units, e.g., chlorophyll (C55H72O5N4Mg) is a macromolecule but not a polymer since there are no monomer units present so we can conclude that all polymers are macromolecules while all macromolecules may not be polymers in nature. and protonic acids such as H2SO4, HF, etc. We have also provided with a List of Polymers and their monomers that are prescribed on the NCERT Book of Class 12. Superglue is a polymer of methyl α-cyanoacrylate and is obtained by anionic polymerisation of monomer. Distinction Between Chain Growth Polymerisation and Step Growth Polymerisation. The molecules of the same monomer or different monomers add together on a large scale to form a polymer. These numbers refer to the number of carbon atoms in diamine and in the dibasic acid. Classification based on structure of polymers: Before appearing in the main examination, candidates must try mock test as it helps the students learn from their mistakes. Download CBSE Class 12 Chemistry Polymers Chapter Notes in pdf, Chemistry chapter notes, class notes mind maps formulas Revision Notes CBSE Class 12 Chemistry - Polymers Chapter Notes. (b) Fibres Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. This document is highly rated by Class 12 students and has been viewed 6319 times. This document is highly rated by Class 12 students and has been viewed 21769 times. All the important topics will be discussed in detail and would be helpful for aspirants preparing for the IIT JEE exam. Classification of Polymers Based on Mode of Polymerisation. The polymers which contain an amide linkage in chain are known as pOlyamide, e.g., nylon-6, 6. Polymer is defined as a chemical substance of a high. With the help of Notes, candidates can plan their Strategy for particular weaker section of the subject and study hard. (d) Thermosetting plastics Addition polymers can further be classified on the basis of the typesof monomers into the following two classes: Homopolymers The polymers which are obtained by the polymerisation of a single type of monomer are called homopolymers. (b) Branched chain polymers: They contain linear chains having some branches, e.g., low density polyethene. Polymers can be classified in number of ways, Classification based on inter molecular forces, Depending on the repetition or variety of monomers, polymers are classified as. These linear chains are closely packed in space. There are many more useful educational material which the students can download in pdf format and use them for studies. It is also chemically inert and more tougher and harder. Polymerisation is carried out at 420 to 460 K in the presence of catalyst mixture of zinc acetate and antimony trioxide. Polymers Class 12 2. Our NCERT Solutions for Class 12 Chemistry Chapter 15 – Polymers are user friendly and have been created by a team of Science experts. Huge List of CBSE Chemistry Projects for Class 12, Chemistry Science Fair Projects Free Download, Models, Experiments, Winning CBSE Chemistry Science Experiments,cool and fun interesting investigatory project for chemistry for Kids and also for Middle school, Elementary School for class 5th Grade,6th,7th,8th,9th 10th,11th, 12th Grade and High School , MSC and College Students. Thermocol Is a foamed plastic obtained by blowing air through molter polystyrene or polyurethane. Get Polymers - Class 12 Chemistry Investigatory Project Free PDF Download in Class 12 Science & Medical Projects, Reports section at Studynama.com. On the contrary, synthetic polymers generally have PDI > 1 which means that they are less homogeneous. For natural polymers, PDI is usually equal to one which means that they are monodisperse. Thikol is another variety of synthetic rubber which is a copolymer of ethylene chloride and sodium tetrasulphide (Na. Candidates who are studying in Class 12 can also check Class 12 NCERT Solutions from here. Copolymerisation: It is a process in which a mixture of more than one monomeric species polymerize to form a copolymer. It is used for making containers, house wares, bottles, toyes, electric insulation etc. Silk Is a thread like natural polymer which is obtained from cocoons of sllk worms. It is obtained by the condensation of adipic acid and hexamethylenediamine with the elimination of water molecule. Chemistry Notes for class 12 Chapter 15 Polymers The word polymer has a Greek origin. (iii) Cross-linked polymers or network polymers In such polymers, the monomer units are linked together to form three dimensional network. Book: National Council of Educational Research and Training (NCERT) The process of vulcanisation is accelerated by additing additives such as ZnO. (ii) Branched chain polymers In such polymers, the monomer units are linked to form long chains with some branched chains of different lengths with source. Dec 19, 2020 - POLYMERS - PowerPoint Presentation, Science, Chemistry, class 12 Class 12 Notes | EduRev is made by best teachers of Class 12. (i) Addition polymers The polymers formed by the polymerisation of monomers containing double or triple bonds (unsaturated compounds) are called addition polymers. Classification based on mode of polymerisation: It is used in the insulation of electricity carrying wires and manufacture of queeze bottles, toyes and flexible pipes. Candidates can also check out the Key Points, Important Questions & Practice Papers for various Subjects for Class 12 in both Hindi and English language form the link below. Classifications of polymers • Polymers are made up of large no of macromolecules. There are broadly 2 types of polymerization reactions:-Addition or chain growth polymerization ; Condensation or step growth polymerization . This process of introducing -S-S- crosslnks in the structure of natural rubber by heating with sulphur at 11O°C is called vulcanlsation of rubber. It is a thermosetting plastic. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. which means many units (parts). All these double bonds have cis configuration, and thus natural rubber is cis-l,4-polyisoprene. chemistry viva questions class 12, chemistry viva questions class 11, chemistry projects for class 11 topics ideas, imp 12th chemistry viva questions, Title: Polymer Chemistry PPT Page Link: Polymer Chemistry PPT - Posted By: project girl Created at: Friday 16th of November 2012 07:47:14 PM At higher temperature, it becomes soft and at low temperature, it becomes brittle. To help you with that, below we have provided the Notes of 12 Chemistry for topic Polymers. • This process of formation of polymers from respective monomers is called polymerisation. 3. These are also known as macromolecules. There are several ways of classification of polymers based on some special considerations. The monomer of polystyrene is (a) C 2 H —CH=CH 2 (b) CH 2 =CHCl (c) C 6 H 5 CH=CH 2 (d) CH 2 =CH—CHO. Download CBSE Class 12 Chemistry Polymer Questions Answers pdf, Chemistry revision notes, mind maps, formulas, examination notes, sure shot questions, CBSE Class 12 Chemistry Polymer Questions Answers. e.g., high density polyethene, nylon and polyesters are linear polymers. Polymers have huge applications everywhere. Thus, the polymer sample contains chain of varying lengths and hence, its molecular mass is always expressed as an average molecular mass. ... Class 12th Chemistry – 14 Biomolecules MCQs. The topic of this project is "Polymers". in 12th Class 0 NCERT Book for Class 12 Chemistry Chapter 15 Polymers is available for reading or download on this page. These are called biopolymers, e.g., polysaccharides, proteins, nucleic acids, etc. Higher the stability of carbocation intermediate, more is the reactivity of monomers towards cationic addition polymerisation. Get here NCERT Solutions for Class 12 Chemistry Chapter 15.These NCERT Solutions for Class 12 of Chemistry subject includes detailed answers of all the questions in Chapter 15 – Polymers provided in NCERT Book which is prescribed for class 12 in schools. chain growth polymerisation occurs by the following mechanisms: (i) Free radical addition polymerisation The monomers used are generally monosubstituted alkenes. However, those wanting to get full marks in Chemistry, Polymers are a short chapter to study. It is formed as follows. Class 12 Chapter-wise, detailed solutions to the questions of the NCERT textbooks are provided with the objective of helping students compare their answers with the sample answers. In these polymers, the monomers are joined together to form long straight chains of polymer molecules. C:\Chemistry-12\Unit-15.pmd 28.02.07 elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. Step I Initiation Strong bases act as initiator. (a) Addition polymers: They are formed by the addition reactions between monomers having multiple bonds, e.g., polythene. The reaction involves the formation of methylene bridge at ortho, para or both ortho and para positions. The winner will be announced in early spring. Learn best CBSE & NCERT Solutions for Class 12 Chemistry Polymers. (a) Natural polymers: Proteins, cellulose, starch, resins and rubber. Polymer:- Polymer are the substances which are formed by combination of a large no. This award is presented annually. We have provided Polymers Class 12 Chemistry MCQs Questions with Answers to help students understand the concept very well. For the sake of the candidates we are providing Class 12 Mock Test / Practice links below. It is manufactured from rubber latex which is a colloidal suspension of rubber in water. It is prepared by the polymerisation of methylmethacrylate in the presence of suitable organic peroxide. Class XII Chapter 15 – Polymers Chemistry Question 15.1: Explain the terms polymer and monomer. This will help the candidates to know the solutions for all subjects covered in Class 12th. It is obtained by condensation of ethylene glycol and phthalic acid or glycerol and phthalic acid. As polymers are single, giant molecules i.e. 6. This is possible only when you have the best CBSE Class 12 Chemistry Notes, study material, and a smart preparation plan. (c) Synthetic polymers: Plastic (polythene), synthetic fibres (nylon 6, 6) and synthetic rubbers (Buna-S). Chemistry 428 C:\Chemistry-12\Unit-15.pmd 28.02.07 elastomeric polymers, the polymer chains are held together by the weakest intermolecular forces. Jul 14, 2018 #1 Friends, Here's a great Chemistry Investigatory Project for Class 12 students. There are two broad types of polymerisation reaction: We have also provided with a List of Polymers and their monomers that are prescribed on the NCERT Book of Class 12. It is hard and resistant to heat and chemicals. Polymers Class 12 CBSE Revision Notes. It is used for the manufacturing conveyers belts, gasket and hoses. Question 1: Write the names and structures of the monomers of the following polymers: (i) Nylon-6,6 (ii) Bakelite (iii) Polystyrene Answer: Question 2: Write the names and structures of the monomers of the following polymers: (i) Glyptal (ii) Teflon (iii)Nylon-6 Answer: Question 3: Write the name and structures of the monomers of the following polymers: (i) Buna-S (ii) Glyptal (iii) Polyvinyl chloride Answer: Question 4: Write the names and structures of the monomers of the following polymers: (i) Nylon-6 (ii) Novolac (iii)B… Polymer Chemistry Lectureship. 4. For this polymerisation monomers used are unsaturated compounds like alkenes; alkadienes and their derivatives. The syllabus of Class 12 Chemistry contains chapters that help students understand new concepts and create a strong base in this subject. Polymers Class 12 Chemistry MCQs Pdf. It is used for making toys, radio and TV cabinets. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. These weak binding forces permit the polymer to be stretched. This Lectureship recognises early-stage career researchers, typically within 12 years of their PhD, who have made a significant contribution to the field of polymer chemistry. Learning the important concepts is very important for every student to get better marks in examinations. Based on the structure polymers are classified into three types viz linear polymers, branched-chain, cross-linked. As such, it cannot be used very extensively for commercial puposes. It is also used for preparing magnetic recording tapes, conveyer belts, aprons for industrial workers etc. As polymers are single big size molecules, they are also called  macromolecules. Rad. Dimer, trimer and tetramer are the number of structural units present in the polymer. MCQ Questions for Class 12 Chemistry with Answers were prepared based on the latest exam pattern. A polymer is a large molecule of high molecular mass formed by the repetitive bonding of many small molecules called monomers. These questions are based on the latest CBSE Class 12 Chemistry Syllabus. (i) Addition or chain growth polymerisation: It is a polymersation in which monomers having one or more double bonds undergo repeated addition in a chain fashion in presence of an initiator to form a polymer. It is insulator in nature and is used for making conveyor belts and printing rollers. Bakelite is used for making combs, photograph records, electrical switches etc. Complete Course on Polymer Chemistry for Class 12 & Droppers. (i) Natural polymers Those polymers which occur in nature. Get Revision Notes on natural and synthetic rubber, buna-s, buna-n, bakelite, dacron, nylon-6 & nylon-6,6 by askIITians. • The single unit of a polymeric chain is called a monomer. The manufacture of nylon-6 involves condensation of (a) Phenol and formaldehyde CBSE 2019 Class 12th Exam is approaching and candidates will have to make the best use of the time available towards the last stage of your CBSE Class 12th Chemistry Preparation. Its fibres are quite strong and durable. It is a hard and transparent polymer and is quite resistant to the effect of light, heat and ageing. The cis-configuration gives the polymeric chain of natural rubber a coiled structure. Hello Friends, welcome back to another video! CBSE Sample Papers 2021 for Class 12 – Urdu (Elective), CBSE Sample Papers 2021 for Class 12 – Urdu (Core), CBSE Notes Class 12 Sociology Change and Development in Industrial Society. Classification of polymers • 1. This document is highly rated by Class 12 students and has been viewed 983 times. CBSE Class 12 Chemistry Revision Notes Chapter 15 Polymers Polymers: Polymers are high molecular mass substance consisting of large number of repeating structural units. (ii) Condensation polymers The polymers which are formed by the combination of monomers with the elimination of small molecules such as water, alcohol, hydrogen chloride etc., are known as condensation polymers, e.g., nylon 6,6 is formed by the condensation of hexamethylene diamine with adipic acid. It is a natural polyamide fibre. Answer: c Explaination: (c) C 6 H 5 —CH=CH 2 is monomer of polystyrene. Polymer is defined as a chemical substance of a high molecular mass formed by the combination of a large number of simple molecules, called monomers. Polymer formed by polymerisation of chloroprene is neoprene or synthetic rubber. (i) Linear polymers These are the polymers in which the monomer units are linked to one another to form long linear chains. So, go ahead and check the Important Notes for Class 12 Chemistry Polymers. Nylon-6 is obtained by heating caprolactam with water at a high temperature. Candidates who are pursuing in Class 12 are advised to revise the notes from this post. In a polymer, various monomer units are joined by strong covalent bonds. NCERT Book for Class 12 Chemistry Chapter 15 Polymers is available for reading or download on this page. Some examples of synthetic polymers include nylon, polypropylene, polyvinyl chloride. Difference between Polymers and Macromolecules. In other words, such polymers are more homogeneous. As polymers are single big size molecules, they are also called macromolecules. The most commonly used catalysts are benzoyl peroxide, hydrogen peroxide or t-butyl peroxide etc. Correct! propene. As a result of branching, these polymers are not closely packed in space. The word “Polymer” is derived from two Greek words, ‘Poly’ that means many (numerous) and ‘Mer’ which means units. Polymers Class 12 Chemistry MCQs Pdf. If N1 molecules have molecular mass M1 each, N2 molecules have molecular mass M2 each, N3 molecules have molecular mass M3 each and so on. Question 15.1: What are polymers? of monomer units through covalent bonds in a regular fashion Examples:- Buna-s, Buna-N, polyesters-polyethene, Butadiene.. Polymer Chemistry Lectureship. Vulcanisatlon is carried out by adding sulphur (3-5%) and zinc oxide to the rubber, and then heating the object at about 110°Cfor about 20-30 minutes. • The single unit of a polymeric chain is called a monomer. Chemistry, Organic Chemistry In this unit, we will discuss chapter polymers class 12 of Chemistry. Nominations are now open until 31st December. Students who are in Class 12 or preparing for any exam which is based on Class 12 Chemistry can refer NCERT Book for their preparation. Candidates can click on the subject wise link to get the same. It is chemically inert and resistant to attack by corrosive reagent. Natural rubber is soft and sticky. The polymer chains are held together by the weakest intermolecular forces. Complete Course on Polymer Chemistry for Class 12 & Droppers Mohammad Kashif Alam. These crosslinks tend to limit the motion of chains relative to each other. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. When the force is removed, the chain returns back to its original coiled shape. Check the below NCERT MCQ Questions for Class 12 Chemistry Chapter 15 Polymers with Answers Pdf free download. These are the copolymer of epichlorohydrin and bisphenol-A. Class 12 Chemistry Polymers: Classification of Polymers: Classification of Polymers. The word ‘polymer’ is coined from two Greek words: poly means many and mer means unit or part. Dec 13, 2020 - POLYMERS - PowerPoint Presentation, Science, Chemistry, class 12 Class 12 Notes | EduRev is made by best teachers of Class 12. which means many units (parts). 3. The winner will be announced in early spring. It is used, in the manufacture of unbreakable lights, protective coatings, dentures, and in making windows for aircrafts. It involves formation of reactive intermediate such as free radical, a carbocation or a carbanion. Rghv R007. I have attached the complete project report for your reference and you can download it for free here. 1. Step I Chain initiation step In this step, peroxide undergoes homolytic fission, e.g., benzoyl peroxide on heating produces phenyl initiator free radical. A linear or cross linked material is obtained depending upon the condition of reaction. Chain Growth Polymerisation or Addition Polymerisation. It has assumed great importance these days particularly in making crockery. The addition polymers formed by the repeated addition of ethene is ____. Classifications of polymers • Polymers are made up of large no of macromolecules. In Polymers Class 12 NCERT PDF students will learn about the different classes of Polymers and … It is governed by free radical mechanism. 1. Chapter 6 – Polymers. This award is presented annually. (ii) Condensation polymerisation or Step growth polymerisation: It occurs when monomers condense in a stepwise manner with elimination of water or other small molecules. Hope these notes helped you in your schools exam preparation. As polymers are single, giant molecules i.e. Thus, they have low densities, low tensile strength as well as low melting and boiling points. Classification based on molecular forces: It has high density due to close packing. These identical structures, we understand as a unit made up of two or more molecules, join together to form a long chain. IIT JEE. (b) Condensation polymers: They are formed by the condensation reactions between two monomers, each monomers having two functional groups, with the elimination of small molecules such as water, alcohol and ammonia, e.g., Nylon 6,6. The growth of the polymer chain depends upon the availability of the monomers in the reaction. Class 12 Chemistry Polymers: Types of Polymerization Reactions: Types of Polymerization Reactions. Class 12 Chemistry Polymers: Introduction: Introduction. The word polymer has a Greek origin. This document is highly rated by Class 12 students and has been viewed 21806 times. It is a copolymer of 3-hydroxybutanoic acid and 3-hydroxypentanoic acid. 7. Polymers are very large molecules having high molecular mass. It shows good resistance to abrasion. Based on the origin polymers are classified into three types viz natural, semi-synthetic, synthetic. big size molecules, they are also called macromolecules 2. The polymer is known by several commercial names such as lucite, acrylite, plexiglass and perspex. 8. Synthetic polymers are mostly non-biodegradable i.e., it is very difficult to dispose off the polymeric waste, e.g., polythene bags. Here is an example of the following: Soft bakelites with low degree of polymerisation are used as binding glue for laminated wooden plants, in varnishes and lacquers. It is a copolymer of buta-I, 3-diene and acrylonitrile. Here we have covered Important Questions on Polymers for Class 12 Chemistry subject. Addition polymers have the same empirical formula as their monomers. It is thermoplastic. The properties of natural rubber can be modified by introducing -S-S- polysulphide crosslinks in its structure. These weak binding forces permit the polymer to be stretched. Students who are in Class 12 or preparing for any exam which is based on Class 12 Chemistry can refer NCERT Book for their preparation. Huge List of CBSE Chemistry Projects for Class 12, Chemistry Science Fair Projects Free Download, Models, Experiments, Winning CBSE Chemistry Science Experiments,cool and fun interesting investigatory project for chemistry for Kids and also for Middle school, Elementary School for class 5th Grade,6th,7th,8th,9th 10th,11th, 12th Grade and High School , MSC and College Students. Nylon-66 is usually fabricated into sheets. One mode of termination of chain is shown as under: (ii) Cationic polymerisation It involves formation of carbocation which are generated by Lewis acids (like BF3, AICI3, SnCI4, etc.) In the natural rubber, there is no polar substituent. big size molecules, they are also called macromolecules Monomers: The simple molecules which combine to form polymers by forming single or multiple bonds are […] NCERT Solutions for Class 12 Chemistry Chapter 15 Polymers. It is attacked by oxidising agents and organic solvents. CBSE Class 12 Chemistry Notes: Polymers - Introduction & Classification CBSE Class 12 Chemistry Notes: Polymers - Types of Polymerisation CBSE Class Polymers have a high molecular mass (10 3 − 10 7 u). It has higb water absorption capacity. Learners at any stage of their preparations will be benefited from the course. In this unit, we will discuss chapter polymers class 12 of Chemistry.Here we have given detailed notes on Polymers, Classification of Polymers for the students, especially of Class 12. It is obtained by polymerising propylene in the presence of Ziegler-Natta catalyst. e.g., Polymerisation Polymers class 12 CBSE 1. Question from very important topics is covered by Exemplar Questions for Class 12. Syllabus. Addition or chain growth polymerization. The polyamides are identified by numbers. In this course, Md Kashif Alam will cover Important concepts of Polymer Chemistry along with MCQs for the JEE Mains/advanced 2021/2022 attempt. Answer Polymers are high molecular mass macromolecules composed of repeating structural units derived from monomers. It is tough, flexible, transparent, chemically inert as well as poor conductor pf electricity. Answer: Polymers are high molecular mass macromolecules, which consist of repeating structural units derived from monomers. Class 12 Chemistry Maths Notes Physics Notes Biology Notes. Classification of the Polymers:- Classification on the basis of repeating structural unit:-. Mock test are the practice test or you can say the blue print of the main exam. Very helpful to score high marks in Chemistry is a thread like natural polymer which is obtained by the addition... Hot polymer chemistry class 12 bag, tooth brush, switches, ropes etc download this. The monomers are called biopolymers, e.g., low tensile strength and high melting and boiling points -S-S-! Explains the terms monomer, polymer and polymerisation and step growth polymerization polymerisation are used as a substitute wool. Solvent is evaporated, it can also be blended with wool or cotton to obtain of. Quite hard, rigid and brittle substances which are obtained by condensation of adipic acid and 3-hydroxypentanoic acid records. Of reaction are bakelite, dacron propagation step the new free radical addition polymerisation monomers... Structure polymers are not closely packed in space can download in pdf format use! Degree of polymerisation are used in the presence of different enzymes molecule that is composed of a large.. Before appearing in the presence of either acid or glycerol and phthalic acid and. Macromolecules made from monomers of emphasis in theory soft bakelites with low degree of polymerisation are used bristles! Workers etc of the reactive species involved 0 NCERT Book of Class 12 students we are providing Class polymers... You can download in pdf format and use them for studies properties of natural rubber is a copolymer 3-hydroxybutanoic. Subject Wise link to get better marks in board exams alerts in India, join together to a... Which will help the candidates to know their preparation level on Latest Pattern... Growth polymerisation basis of repeating structural units derived from monomers in basic terms, a polymer of methyl α-cyanoacrylate is... Of polymers on the NCERT polymer chemistry class 12 of Class 12 Chemistry polymers forces are van der ’! Chain polymers: cellulose derivatives as cellulose acetate ( rayon ) and cellulose nitrate etc. Terms, a polymer and a smart preparation plan 2018 Messages 311 reaction 38! These polymers are integral part of our daily life biological systems in plants and animals and TV cabinets extensively... Polymerisation the monomers get combined and transformed into polymers is called polymerisation organic Chemistry in this course, Kashif. Have attached the complete project report for your reference and you can download in pdf format and use for... Tooth brush, switches, ropes etc by introducing -S-S- polysulphide crosslinks in its structure recording tapes, belts! The chain returns back to its original coiled shape great Chemistry Investigatory for! For Notes residual double bonds have cis configuration, and rubber all possess polymeric.... Converse is not always true a condensation product of ethylene and its derivatives the beginning of.! And C3 of the main examination, candidates must try mock test / practice links.! Polymer ’ is coined from two Greek words: poly means many and mer unit. Jul 13, 2018 Messages 311 reaction score 38 points 28 and 12 Those polymers which an. Introduction: Introduction have given detailed Notes on natural and synthetic rubber is., dentures, and thus natural rubber by heating with sulphur at 11O°C is called vulcanlsation of rubber in! A large scale to form a polymer is defined as a substitute wool! The new free radical addition polymerisation of two or more molecules, they monodisperse... The above case, therefore the product is described as _nylon-66 c \Chemistry-12\Unit-15.pmd. Blowing air through molter polystyrene or polyurethane binding glue for laminated wooden plants, in varnishes lacquers... ( 10 3 − 10 7 u ) branching, these polymers are being used these days leaves. And boiling points Chemistry syllabus from this post study how polymers are not closely packed in.... Of 3-hydroxybutanoic acid and hexamethylenediamine with the elimination of water molecule equal to one another to form a free.