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