Download GTU BE/B.Tech 2019 Winter 3rd Sem New 2132301 Introduction To Plastic Material Science Question Paper

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Subject Code: 2132301

GUJARAT TECHNOLOGICAL UNIVERSITY

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BE - SEMESTER- III (New) EXAMINATION — WINTER 2019
Subject Name: Introduction to Plastic Material Science
Time: 02:30 PM TO 05:00 PM
Date: 28/11/2019
Total Marks: 70

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Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1 (a) What are Functionality of Monomer and Degree of Polymerization? [03]

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(b) Explain Types of Polymer according to their Origin and Polymerization process. [04]
(c) Differentiate between Thermoplastic and Thermosetting Polymer. [07]

Q.2 (a) Give details on: Inhibition and Retardation for Polymer [03]
(b) Give the Functionality of following Monomer: Glycerol, Ethylene Glycol, Adipic Acid, Hexamethylene Diamine [04]
(c) Give Full name of LLDPE. Explain Addition Polymerization with mechanism. [07]

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OR
(c) “Thermoplastic polymer can be recycled” justified this sentence with example. [07]

Q.3 (a) Give the structure of repeating unit of following polymers: a) Butyl Rubber b) PET c) Nylon 66. [03]
(b) What is Glass Transition Temperature (Tg)? Give Tg of PVC and LDPE. [04]
(c) Describe Engineering and Commodity Plastics. Give their examples. [07]

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OR
(a) Explain Suspension Polymerization Technique. [03]
(b) What is Tacticity in polymers? Explain briefly. [04]
(c) How Crystallinity affect properties of polymer? [07]

Q.4 (a) Explain Homochain and Heterochain polymers. [03]

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(b) What is Polydispersity? How it effect polymer’s properties? [04]
(c) What is Configuration and Confirmation? Give their examples. [07]
OR
(a) What is the practical significance of polymer molecular weight? [03]
(b) Explain the bulk polymerization technique. Give its disadvantages. [04]

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(c) Explain free radical polymerization. [07]

Q.5 (a) What is the importance of Tg and its relation to HDT [03]
(b) What are Organic & Inorganic polymers? Explain giving examples. [04]
(c) What are Spherulites. Explain them briefly. [07]
OR

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(a) Enlist the instrument used to know Crystallinity in polymers. Give any two examples of amorphous and crystalline polymer. [03]
(b) Explain Hydrogenation and Addition Reactions of Polymers. [04]
(c) What is Vulcanization of Rubber? Give its benefit. [07]