It is a phenol formaldehyde resin, formed from condensation reaction of phenol and formaldehyde PROPERTIES:-Tensile strength; Higher tensile strength holds a greater weight before snapping. C) Addition polymers contain all of the atoms of the original monomers, but condensation polymers do not. When addition polymers form, ... Styrene-butadiene rubber is an example of a a. copolymer b. natural elastomer c. natural cross linked polymer USES: It is used as a material resistant to heat and chemical attack in household works. Plus Two Chemistry Polymers Three Mark Questions and Answers. Question 10. A common example of linear polymer. Some examples include, bakelite and melamine formaldehyde resin. The reaction is shown in the graphic on the left. Formation of a condensation polymer, on the other hand, produces H 2 O, HCl, or some other simple molecule which escapes as a gas. Give one example of each. Modelling addition polymers. It is further classified into, (A) Polystyrene (B) Nylon (C) PVC (D) Polypropylene. A) Both addition polymers and condensation polymers contain all of the atoms of the monomers. Give one example. (a) PMMA (b) Nylon- 6, 6 (c) Dacron (d) Bakelite. Type Addition polymer Bakelite Monomer Phenol and Formaldehyde Type Condensation polymer Natural Rubber Monomer Isoprene Type Addition polymer. The first semisynthetic polymer was actually made from a natural polymer. Most natural polymers being employed at early stage of human society are of condensation type. Linear polymers: Polythene, Polyvinylchloride. Bakelite is the first synthetic plastic and is known as a “material of thousand uses” due to its versatile applications. Along came Bakelite – which is the first example of a truly synthetic polymer (the rest were just modifications of cellulose). 16: Three dimensional molecules with cross links are formed in the case of a _____ 17: Which is not polymer? Teflon is formed by step growth polymerisation. Fibers. A) Glucose done clear. 18: Which is used in formation of nylon-66? 19: Which of the following has ester linkage? The polymer is a long chain molecule which is formed by joining many small molecules called monomers. Familiar examples of cross-linked polymers are Bakelite, rubber, and casting (boat) resin. SOME IMPORTANT POLYMERS NATURAL AND SYNTHETIC LIKE POLYMERS LIKE POLYSTERS, BAKELITE, RUBBER, BIODEGRABLE AND NON-BIODEGRABLE POLYMERS 1. Examples of such polymers include bakelite and melmac. These polymers contain bi-functional and tri-functional monomers and strong covalent bonds between various linear polymer chains. Again there are four types of addition polymerizations which are. An Overview of its Properties and Uses. Which compound form linear polymer due to H-bond? Question 47. 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 Which is an example of thermosetting polymer? Solution: Bakelite is a thermosetting polymer. They have a stronger covalent bond in comparison to other linear polymers. Which of the following polymer is an example of fibre [AIIMS 2000; Pb. iv) ... As the name suggests addition polymers form when an addition reaction occurs. Give one example of each of these ... Monomers combine together with the loss of molecules like H 2 O, NH 3, etc. A. Bakelite B. Melamine C. Branched D. Cross-linked 10. Addition Polymerization: Example, poly ethane, Teflon, Polyvinyl chloride (PVC) Other Addition Polymers. Notice how every other carbon must have a chlorine attached. ⇒ Zeigler process produces high density polythene. 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 Key Difference – Bakelite vs Plastic Plastic and Bakelite are both organic polymers, having a very large molecular weight though there exists a difference between the two based on their properties and usage. Addition polymers: Polyvinyl chloride, polythene.Condensation polymers: Terylene, Bakelite. Historical aspects. They are composed of bifunctional and trifunctional monomers. Other Ways to Classify Polymers Classification Based on Polymerization. -It requires two like molecules. What is its use? These included other types of cast phenolic resins similar to Catalin , and urea-formaldehyde resins, which could be made in brighter colors than polyoxy­benzyl­methylene­glycol­anhydride. uses no catalyst. Presented here are the properties and other uses of Bakelite you should know about. Give two examples of each (i) linear polymer (ii) Network polymer. Ans. What is Bakelite Plastic? Polymer obtained by condensation polymerization is 1) Polythene 2) Teflon 3) Phenol-formaldehyde 4) Nitrile rubber 2. (b) What are biodegradable polymers? Addition Polymers The addition polymers formed by the polymerisation of a single monomeric species are known as homopolymers. *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. 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 … 9. Contributors; When addition polymers are formed, no by-products result. structure with tremendous rigidity. Addition polymers are a type of polymer in which all the monomers are unsaturated or to simply to say are alkenes. (a) Distinguish between homopolymers and copolymers. EXAMPLES-Bakelite,formaldehyde etc. Bakelite, trademarked synthetic resin invented in 1907 by Belgian-born American chemist Leo Hendrik Baekeland. (Comptt. 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). together to form a 3 dimensional network polymers. 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. Poly(ethene) is an addition polymer. It is used for … Bakelite, formed from the condensation reaction of phenol with formaldehyde, became hugely popular – perhaps you have seen products with Bakelite, such as … It is an addition polymer of tetraflouroethylene.It is bad conductor of heat. Polyacrylonitrile is an example of (a) addition polymer (b) condensation polymer (c) natural polymer (d) None of these. The catalyst used in the manufacture of polythene by Ziegler method is What is bakelite? 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. An example is vulcanized rubber. 1 answer. The double bonds in monomers break and they join to form a big molecule. The best example is polymerization of ethylene. It is because of the unique properties it possesses. Question 1. Network polymers: Bakelite, Melamine. But there is no loss of an atom or a molecule. Which of the following is not an example of addition polymer ? Condensation polymers are generally formed by step growth polymerisation. These polymers are formed when linear polymeric chains are connected together to make up a three dimensional network structure. Differentiate between the modes of formation of an addition polymer and a condensation polymer. During addition polymerization, the monomers rearrange themselves to form a new structure. 20: Which of the following is an addition polymer? C) Urea-formaldehyde resin done clear. 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. Answer: Bakelite is the condensation polymer of phenol and formaldehyde. Orientation of monomer units in a polymer molecule A. Tacticity B. Graft C. Linear D. Monomer arrangement 11. 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". 1) Polythene 2) PVC Odd one out: choose the letter of the word that is not related from the other choices. The process can be … In addition polymerisation, the molecules of the same monomer add together on a large scale to form a polymer. Free Radical Polymerization: Here the addition polymer forms by addition of atoms with a … CET 2001] A) Silk done clear. A. Bakelite B. Melamine C. Branched D. Poly-vinyl chloride 9. Examples – Bakelite, melamine, etc. produces low density polythene. These polymers have many cross-linking bonds that give rise to a network-like structure. Which of the following is an addition polymer . The monomers used are unsaturated compounds like alkenes, alkadienes and their derivatives. The first truly synthetic plastic was bakelite, developed by Leo Baekland between 1905 and 1914. Why bakelite is said to be an example for thermosetting polymer? Addition and condensation polymers can exist with a cross-linked network, depending on the monomers used in the synthesis. It allows ethene molecules to join together to form a single product, so it is an example of an addition reaction. They have a very strong intermolecular force. Bakelite is an example of polymer. A familiar example of a condensation polymer is nylon, which is obtained from the reaction of two monomers. Which of the following represents the example of homopolymer? Check Answer and Solution for abov All India 2013) Answer: Examples: Terylene, Bakelite, ... Related questions 0 votes. Bakelite and melamine are examples in this category. B) Both addition polymers and condensation polymers lose some atoms from the original monomers when the polymer is formed. Addition polymers are generally formed by chain growth polymerisation. Bakelite is formed by step growth polymerisation. Question 11. Bakelite done clear. Ever wondered why the plastic Bakelite was used to make those bangles and chess pieces? Polymers can also be classified on the basis of mode of polymerisation into two sub groups. Example: Formation of polythene from ethene. Here are 100 most important Multiple choice questions and answers on Polymer and Polymerization for the entrance exams. 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. Each ( i ) linear polymer ( ii ) network polymer with cross links are formed in the manufacture polythene. Made from a natural polymer other choices following represents the example of addition polymer a! Like POLYSTERS, Bakelite, rubber, and brittle obtained by condensation polymerization is )... ) Polystyrene ( b ) Nylon ( c ) Dacron ( d ) Bakelite compounds LIKE alkenes, alkadienes their... 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