Answer. 14. & Formation of the polyester terylene from a dicarboxylic acid (benzene-1,4-dicarboxylic acid) and diol (ethane-1,2-diol). Examples: Nylon, terylene, Bakelite. Polystyrene is … 2. POLYAMIDE Polyamides are a group of condensation polymers commonly known as nylon. For e.g., Nylon - 6, 6 is formed by condensation polymerization of adipic acid and hexamethylenediamine. The best example is polymerization of ethylene. Free PDF Download of CBSE Chemistry Multiple Choice Questions for Class 12 with Answers Chapter 15 Polymers. Terms It is copolymer and has ester linkage. View desktop site. Condensation polymerisation. The raw materials for polystyrene are ethylene and benzene that react to form ethyl benzene, which is further processed into styrene monomer; other feed stocks are acrylonitrile and butadiene rubber. It is used as friction modifier. & Polymers that contain only a single type of repeat unit are known as homopolymers, while polymers containing a mixture of repeat. Because the ionic strength of urine is equivalent to an 0.1 M NaCl solution, this superabsorbant polymer, which can be found in disposable diapers, can absorb up to 60 times its weight in urine. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Polystyrene is a thermoplastic polymer. There are two types of Condensation polymers: 1. Specify whether polystyrene is a condensation polymer, a homopolymer, a copolymer or a block polymer. Specify whether polystyrene is a condensation polymer, a homopolymer, a copolymer, or a block polymer. For polyethylene, arguably the simplest polymer, this is demonstrated by the following equation. Check Answer and Solution for above question Addition polymers are composed of several unsaturated monomers bonded together. Polyesters such as PET (polyethylene terephthalate) are condensation polymers. Novolac, the linear polymer used in paints is (a) copolymer of buta 1, 3-diene and styrene (b) polymer of methyl methacrylate (c) condensation polymer of phenol and HCHO (d) copolymer of melamine and HCHO. Protein is a natural polymer. A polymerization process using a thermal or catalyzed reaction of styrene monomer is used to produce an amorphous polystyrene polymer. View desktop site. Here ethylene (ethene) is the monomer, and the corresponding linear polymer is called high-density polyethylene (HDPE). It is produced by the polymerization of styrene and is the most widely used plastic. Polyurethanes (PUs) are a family of condensation polymers that include the urethane (–NHCOO–) group in the chemical structure (Figure 5.1). Styrene consists of a benzene ring (a six membered ring with three double bonds) bonded to an ethene chain. Answer/Explanation. Polyvinyl chloride (PVC) is extensively used for plumbing pipes. Experimental Organic Chemistry | 6th Edition. Important condensation reactions are esterification, ester interchange, etherification, and amidization. Condensation polymers are formed by the combination of monomers with the elimination of simple molecules such as H 2 O or CH 3 OH. © 2003-2020 Chegg Inc. All rights reserved. The only difference is that both the alcohol and the acid monomer units each have two functional groups - … It becomes rigid again when it cools down. D) Condensation polymers contain all of the atoms of the original monomers, but addition polymers do not. Problem 11E: Specify whether polystyrene is a condensation polymer, a hom... JavaScript is required to view textbook solutions. Terms In a polymer, the monomers are linked to each other in a continuous or repetitive manner. The synthesis is shown below. Best Answer 100% (6 ratings) Polymers that contain only a single type of repeat unit are known as homopolymers, while polymers containing a mixture of repeat view the full answer. . Answer to Specify whether polystyrene is a condensation polymer, a homopolymer, a copolymer, or a block polymer. Condensation polymers are formed through a condensation reaction, where molecules join together, losing small molecules as byproducts. At room temperature, the thermoplastic polymer is a solid but when heated above 100 °C it flows. Polyvinyl chloride, Bakelite and polystyrene are some of the examples of polymers. In condensation polymerisation, a small molecule is formed as a by-product each time a bond is formed between two monomers. a. The monomers used are lactic acid and glycolic acid. Figure \(\PageIndex{4}\): Polyvinyl chloride. It is an inexpensive resin per unit weight. Condensation polymer among the following is - (a) Teflon (b) Polystyrene (c) PVC (d) Dacron Polystyrene is an aromatic polymer and has many uses including protective packaging, in trays, as … (A) Polystyrene (B) PAN (C) Neprene (D) Polyethyleneglycol terephthalate. Therefore, most polyurethane and polystyrene foams are manufactured by forcing a pressurized gas, such as nitrogen or carbon dioxide, into the polymerizing mixture. Polystyrene is made from the monomer styrene which is a liquid petrochemical. It is added to lubricants to reduce surface friction. Polystyrene is a hard, brilliantly transparent, stiff resin. There are two major types of polymers: addition polymers and condensation polymers. *Addition polymerization -The addition polymerization means that two monomers react with each other and no other small molecules are generated. H2O. General-purpose polystyrene is clear, hard, and rather brittle. Neoprene is a natural rubber. Dextron is a polyacetic acid polyglycolic acid polymer. DVB has vinyl groups (-CH=CH 2) at each end of its molecule, each of which can be polymerized into a polymer chain like any other vinyl group on a … The repeating structural unit of most simple polymers not only reflects the monomer(s) from which the polymers are constructed, but also provides a concise means for drawing structures to represent these macromolecules. Polythene is a copolymer, while SBR is a homopolymer. Students can solve NCERT Class 12 Chemistry Polymers MCQs Pdf with Answers to know their preparation level. Polystyrene can be solid or foamed. Polystyrene (PS) / ˌ p ɒ l i ˈ s t aɪ r iː n / is a synthetic aromatic hydrocarbon polymer made from the monomer known as styrene. Polyester. Polyamide. Privacy -It requires two like molecules. Polystyrene b. Teflon c. Polyvinychloride d. polypropylene e. dacron The process is known as condensation polymerisation - forming water molecules together with polyester molecules. The formation of a polyester follows the same procedure as in the synthesis of a simple ester. Chemistry MCQs for Class 12 Chapter Wise with Answers PDF Download was Prepared Based on Latest Exam Pattern. Privacy Both are formed differently, and have distinct structural features. These monomer units are linked to each other either through the formation of peptide linkage, glycosidic linkage or by removal of any moiety such as a water molecule. If both moieties are difunctional, the condensation product is a linear polymer, and if at least one of the moieties is tri- or tetra-functional, the resulting polymer is a crosslinked polymer Start studying Chem Homework Polymers. The history of PUs started in 1937 when Dr Otto Bayer of Bayer Germany invented the diisocyanate polyaddition process. In the repeat unit In the repeat unit above shown the R … | Which of the following is a condensation polymer ? Condensation Polymers Bakelite is a condensation polymer of phenol and formaldehyde. You should be able to draw a short section of a polymer given the monomer units (and vice versa). Polyisoprene is a polymer of isoprene and is … The molecule most commonly split out between monomers to make a condensation polymer is Notice that n monomer molecules produce one polymer molecule with n repeat units. Check Answer and Solution for above question from Chemistry in Polymers - Tardigrade The synthesis of polystyrene is carried out using a reaction known as free radical polymerisation. This polymer can absorb 800 times it own weight of distilled water, but only 300 times its weight of tap water. Polystyrene with DVB: Cross-linking between polymer chains can be introduced into polystyrene by copolymerizing with p-divinylbenzene (DVB). Polyethylene in plastic, and nylon, are both common polymers used every day, among several others. | Specify whether polystyrene is a condensation polymer, a homopolymer, a copolymer or a block polymer. What is Bakelite? Polystyrene is used in insulation and in molded items such as coffee cups. Answer: c Explaination: (c) It … Figure \(\PageIndex{3}\): Polystyrene synthesis and structure. HDPE is composed of macromolecules in which n ranges from 10,000 to … WBJEE 2018: A condensation polymer among the following is (A) Dacron (B) PVC (C) Polystyrene (D) Teflon. © 2003-2020 Chegg Inc. All rights reserved. [For more information about this polymer, see Ibid., Volume 1, page 216.] Show Video. Terylene: Example of polyester. Some polymers are made via condensation polymerisation. Is clear, hard, brilliantly transparent, stiff resin students can solve NCERT 12. Study tools it is added to lubricants to reduce surface friction Chegg Inc. all rights.. Ethene chain are esterification, ester interchange, etherification, and have distinct structural.! Produce an amorphous polystyrene polymer polymerization of adipic acid and hexamethylenediamine is homopolymer... 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