Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 3rd Sem New 2132301 Introduction To Plastic Material Science Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132301 Date: 04/06/2019
Subject Name:Introduction to Plastic Material Science
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define: Monomer, Homochain Polymer, Initiator 03
(b) Give functionality of: (i) HOOCCH 2COOH (ii) C 6H 5CH 2OH
(iii) CH 3CH(OH)COOH (iv) H2NCH2 (CH2)4 CH2NH2
04
(c) Give classification of Polymers giving suitable examples. 07
Q.2 (a) Describe Bulk polymerization technique with advantages. 03
(b) Give structures of: PVC, PAN, PMMA, PP 04
(c) Differentiate between low molecular weight compound and polymers. 07
OR
(c) Explain various steps of Cationic Polymerization. 07
Q.3 (a) Discuss: Linear, Branched and crosslinked polymer structures. 03
(b) Give difference between Step and Chain polymerization. 04
(c) You have a polymer sample that contains the following molecules:
Mi , g/mol N
1,000,000 2
700,000 5
400,000 10
100,000 4
50,000 2
Total 23
What are Mn, Mw and the polydispersity index?
07
OR
Q.3 (a) Calculate the contour length and the extended chain length of PE Mol.
Given: - n =5000 , Bond angle-109?28', Segment length -1.54 ?.
03
(b) Write a note on: Suspension Polymerization. 04
(c) List the types of Chain Polymerization? Explain Free radical
Polymerization in detail.
07
Q.4 (a) Calculate the degree of polymerization of a sample of polyethylene
[(CH2-CH2)n], which has a molecular weight of 150,000 g/mol.
03
(b) What do you mean by Homopolymer and Copolymer? List the types of
copolymers and explain them with suitable example.
04
(c) Explain factors influencing the Glass transition temperature with
suitable examples.
07
OR
Q.4 (a) What are inhibitors? Give its types and its uses. 03
(b) Explain effect of crystallinity on the properties of Polymer. 04
(c) Discuss about the tacticity of polymers with example. 07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?III (NEW) EXAMINATION ? SUMMER 2019
Subject Code: 2132301 Date: 04/06/2019
Subject Name:Introduction to Plastic Material Science
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
MARKS
Q.1 (a) Define: Monomer, Homochain Polymer, Initiator 03
(b) Give functionality of: (i) HOOCCH 2COOH (ii) C 6H 5CH 2OH
(iii) CH 3CH(OH)COOH (iv) H2NCH2 (CH2)4 CH2NH2
04
(c) Give classification of Polymers giving suitable examples. 07
Q.2 (a) Describe Bulk polymerization technique with advantages. 03
(b) Give structures of: PVC, PAN, PMMA, PP 04
(c) Differentiate between low molecular weight compound and polymers. 07
OR
(c) Explain various steps of Cationic Polymerization. 07
Q.3 (a) Discuss: Linear, Branched and crosslinked polymer structures. 03
(b) Give difference between Step and Chain polymerization. 04
(c) You have a polymer sample that contains the following molecules:
Mi , g/mol N
1,000,000 2
700,000 5
400,000 10
100,000 4
50,000 2
Total 23
What are Mn, Mw and the polydispersity index?
07
OR
Q.3 (a) Calculate the contour length and the extended chain length of PE Mol.
Given: - n =5000 , Bond angle-109?28', Segment length -1.54 ?.
03
(b) Write a note on: Suspension Polymerization. 04
(c) List the types of Chain Polymerization? Explain Free radical
Polymerization in detail.
07
Q.4 (a) Calculate the degree of polymerization of a sample of polyethylene
[(CH2-CH2)n], which has a molecular weight of 150,000 g/mol.
03
(b) What do you mean by Homopolymer and Copolymer? List the types of
copolymers and explain them with suitable example.
04
(c) Explain factors influencing the Glass transition temperature with
suitable examples.
07
OR
Q.4 (a) What are inhibitors? Give its types and its uses. 03
(b) Explain effect of crystallinity on the properties of Polymer. 04
(c) Discuss about the tacticity of polymers with example. 07
2
Q.5 (a) Give difference between amorphous & crystalline polymers and their
examples.
03
(b) Plot graph for specific volume v/s temperature for highly crystalline,
amorphous and partially crystalline polymers and explain.
04
(c) Explain Polydispersity & Molecular weight distribution in polymers. 07
OR
Q.5 (a) Explain relation between: Tg & Molecular weight 03
(b) Explain (1) Hydrolysis (2) Aminolysis. 04
(c) Explain Emulsion Polymerization technique with schematic diagram. 07
*************
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This post was last modified on 20 February 2020