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