Subject Code: 132301
GUJARAT TECHNOLOGICAL UNIVERSITY
--- Content provided by FirstRanker.com ---
BE - SEMESTER-III (OLD) EXAMINATION - WINTER 2017
Subject Name: Introduction to Plastic Material Science
Time: 10:30 AM to 01:00 PM
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
Q.1
(a) Discuss How polymers and low molecular weight compounds are differing from each other? [07]
(b) List various steps of free radical polymerisation and explain each with suitable example. [07]
--- Content provided by FirstRanker.com ---
Q.2
(a) Define polymers. Give detail classification of polymers with suitable examples. [07]
(b) What are chain and step polymerization? Give difference between them. [07]
OR
(b) Give difference between thermoplastic and thermosetting plastics. [07]
--- Content provided by FirstRanker.com ---
Q.3
(a) Explain Polydispersity & Molecular weight distribution in polymers. [07]
(b) What is Glass transition temperature? Discuss various factors affecting Tg. [07]
OR
Q.3
--- Content provided by FirstRanker.com ---
(a) Explain number average and weight average molecular weight in polymers. [07]
(b) Explain bulk polymerization technique along with advantages, disadvantages and applications. [07]
Q.4
(a) Explain optical isomerism by suitable examples. [07]
(b) Discuss various factors affecting crystallisability. [07]
--- Content provided by FirstRanker.com ---
OR
Q.4
(a) What do you mean by Polydispersity? Explain Polydispersity & Molecular weight distribution in polymers. [07]
(b) Answer the following: [07]
- Write a note on Tacticity
- Calculate the contour length and the extended chain length of PE. Mol. Given: - n =6000 , Bond angle-109°28' ,Segment length -1.54 A.
--- Content provided by FirstRanker.com ---
Q.5
(a) Explain Emulsion polymerization in detail. [07]
(b) Define: Co-polymer, Initiator, Cross-linked polymer, Graft copolymer, Degree of polymerisation, Inhibitor, Block copolymer [07]
OR
--- Content provided by FirstRanker.com ---
Q.5
(a) Explain solution polymerization technique. [07]
(b) Give difference between suspension and emulsion polymerization. [07]
Date: 17/11/2017
Total Marks: 70
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE/B.Tech 2017 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---