Addition Polymers The addition polymers formed by the polymerisation of a single monomeric species are known as homopolymers. 19: Which of the following has ester linkage? 1 answer. Bakelite done clear. Fibers. Addition Polymerization: Example, poly ethane, Teflon, Polyvinyl chloride (PVC) Examples of such polymers include bakelite and melmac. -It requires two like molecules. These questions are likely to appear in entrance exam of MBBS, ENGINEERING , BDS, BN, BMLT, AG , BVSC and various other medical and paramedical entrance exams. Examples – Bakelite, melamine, etc. Addition and condensation polymers can exist with a cross-linked network, depending on the monomers used in the synthesis. It is because of the unique properties it possesses. EXAMPLES-Bakelite,formaldehyde etc. It is an addition polymer of tetraflouroethylene.It is bad conductor of heat. Here are 100 most important Multiple choice questions and answers on Polymer and Polymerization for the entrance exams. Answer: Bakelite is the condensation polymer of phenol and formaldehyde. The process can be … Teflon is formed by step growth polymerisation. Addition polymers are generally formed by chain growth polymerisation. Some common examples are Proteins (which are found in humans and animals alike), ... thermosetting polymer is that of Bakelite, which is used in making electrical insulation. Which of the following polymer is an example of fibre [AIIMS 2000; Pb. These polymers are formed when linear polymeric chains are connected together to make up a three dimensional network structure. An Overview of its Properties and Uses. Along came Bakelite – which is the first example of a truly synthetic polymer (the rest were just modifications of cellulose). It is a phenol formaldehyde resin, formed from condensation reaction of phenol and formaldehyde These polymers have many cross-linking bonds that give rise to a network-like structure. The double bonds in monomers break and they join to form a big molecule. In addition to the original Bakelite material, these companies eventually made a wide range of other products, many of which were marketed under the brand name "Bakelite plastics". An example is vulcanized rubber. Bakelite is formed by step growth polymerisation. C) Urea-formaldehyde resin done clear. Bakelite is the first synthetic plastic and is known as a “material of thousand uses” due to its versatile applications. A) Glucose done clear. Modelling addition polymers. Historical aspects. 18: Which is used in formation of nylon-66? 9. Polymer obtained by condensation polymerization is 1) Polythene 2) Teflon 3) Phenol-formaldehyde 4) Nitrile rubber 2. 1) Polythene 2) PVC (a) Distinguish between homopolymers and copolymers. Bakelite, formed from the condensation reaction of phenol with formaldehyde, became hugely popular – perhaps you have seen products with Bakelite, such as … Question 47. The reaction is shown in the graphic on the left. Which of the following represents the example of homopolymer? 16: Three dimensional molecules with cross links are formed in the case of a _____ 17: Which is not polymer? It allows ethene molecules to join together to form a single product, so it is an example of an addition reaction. They have a stronger covalent bond in comparison to other linear polymers. A common example of linear polymer. Which of the following is not an example of addition polymer ? Orientation of monomer units in a polymer molecule A. Tacticity B. Graft C. Linear D. Monomer arrangement 11. In addition polymerisation, the molecules of the same monomer add together on a large scale to form a polymer. Some examples include, bakelite and melamine formaldehyde resin. Bakelite, trademarked synthetic resin invented in 1907 by Belgian-born American chemist Leo Hendrik Baekeland. (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. Bakelite and melamine are examples in this category. Give one example. Examples: Terylene, Bakelite, ... Related questions 0 votes. ⇒ Zeigler process produces high density polythene. The synthesis of bakelite starts with the reaction between formaldehyde (H 2 CO) and phenol (C 6 H 5 OH) to form a mixture of ortho- and para-substituted phenols. Question 11. Plus Two Chemistry Polymers Three Mark Questions and Answers. Linear polymers: Polythene, Polyvinylchloride. A) Both addition polymers and condensation polymers contain all of the atoms of the monomers. Formation of a condensation polymer, on the other hand, produces H 2 O, HCl, or some other simple molecule which escapes as a gas. A. Bakelite B. Melamine C. Branched D. Cross-linked 10. iv) ... As the name suggests addition polymers form when an addition reaction occurs. But there is no loss of an atom or a molecule. Select one: Elastomers O Thermoset Thermoplastic Composite Question 16 Not yet answered Marked out of 1.00 P Flag question The following figure represents Face Centered Cubic structure Select one: True O False What is bakelite? SOME IMPORTANT POLYMERS NATURAL AND SYNTHETIC LIKE POLYMERS LIKE POLYSTERS, BAKELITE, RUBBER, BIODEGRABLE AND NON-BIODEGRABLE POLYMERS 1. A familiar example of a condensation polymer is nylon, which is obtained from the reaction of two monomers. The polymer is a long chain molecule which is formed by joining many small molecules called monomers. The first truly synthetic plastic was bakelite, developed by Leo Baekland between 1905 and 1914. It is further classified into, These included other types of cast phenolic resins similar to Catalin , and urea-formaldehyde resins, which could be made in brighter colors than polyoxy­benzyl­methylene­glycol­anhydride. produces low density polythene. Ans. A hard, infusible, and chemically resistant plastic, Bakelite was based on a chemical combination of phenol and formaldehyde (phenol-formaldehyde resin), two compounds that were derived Condensation polymers are generally formed by step growth polymerisation. Question 10. Contributors; When addition polymers are formed, no by-products result. Which compound form linear polymer due to H-bond? Check Answer and Solution for abov PROPERTIES:-Tensile strength; Higher tensile strength holds a greater weight before snapping. The catalyst used in the manufacture of polythene by Ziegler method is Type Addition polymer Bakelite Monomer Phenol and Formaldehyde Type Condensation polymer Natural Rubber Monomer Isoprene Type Addition polymer. (Comptt. Other Ways to Classify Polymers Classification Based on Polymerization. (b) What are biodegradable polymers? Why bakelite is said to be an example for thermosetting polymer? All India 2013) Answer: 20: Which of the following is an addition polymer? Network polymers: Bakelite, Melamine. Ever wondered why the plastic Bakelite was used to make those bangles and chess pieces? Polyacrylonitrile is an example of (a) addition polymer (b) condensation polymer (c) natural polymer (d) None of these. The synthesis of first truly synthetic polymeric material, bakelite, was announced by Leo Baekeland in 1907, through a typical step-growth polymerization fashion of phenol and formaldehyde.The pioneer of synthetic polymer science, Wallace Carothers, developed a new means … The first semisynthetic polymer was actually made from a natural polymer. Question 1. (a) PMMA (b) Nylon- 6, 6 (c) Dacron (d) Bakelite. Example: Formation of polythene from ethene. Familiar examples of cross-linked polymers are Bakelite, rubber, and casting (boat) resin. Other Addition Polymers. Notice how every other carbon must have a chlorine attached. Odd one out: choose the letter of the word that is not related from the other choices. USES: It is used as a material resistant to heat and chemical attack in household works. Which is an example of thermosetting polymer? The monomers used are unsaturated compounds like alkenes, alkadienes and their derivatives. Give one example of each of these ... Monomers combine together with the loss of molecules like H 2 O, NH 3, etc. Again there are four types of addition polymerizations which are. They are composed of bifunctional and trifunctional monomers. Bakelite is an example of polymer. These polymers contain bi-functional and tri-functional monomers and strong covalent bonds between various linear polymer chains. C) Addition polymers contain all of the atoms of the original monomers, but condensation polymers do not. Give one example of each. What is its use? Solution: Bakelite is a thermosetting polymer. together to form a 3 dimensional network polymers. structure with tremendous rigidity. What is Bakelite Plastic? *Addition polymerization -The addition polymerization means that two monomers react with each other and no other small molecules are generated. They are very rigid, hard, and brittle. PVC (polyvinyl chloride), which is found in plastic wrap, simulated leather, water pipes, and garden hoses, is formed from vinyl chloride (H 2 C=CHCl). B) Both addition polymers and condensation polymers lose some atoms from the original monomers when the polymer is formed. The best example is polymerization of ethylene. Based on the mode of polymerisation, it is classified into; Addition polymers: Polymers are formed by the repeated addition of monomers with double and triple bonds. Most natural polymers being employed at early stage of human society are of condensation type Bakelite Melamine. Atoms from the original monomers when the polymer is Nylon, which is as... Most natural polymers being employed at early stage of human society are of condensation type a.. 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