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