Enrolment No.
GUJARAT TECHNOLOGICAL UNIVERSITY
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BE - SEMESTER-IV (NEW) EXAMINATION - WINTER 2018Subject Code: 2142306 Date: 01/12/2018
Subject Name: Manufacturing of plastics Material-2
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
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- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
MARKS
Q.1 (a) Write the structures of Isotactic, Syndiotactic and Atactic PP and compare their properties. 03
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(b) Explain the bulk polymerization technique along with its advantages and disadvantages. 04
(c) List the points of difference between Addition and Condensation polymerization. 07
Q.2 (a) Explain the monomer preparation process of Styrene. 03
(b) Compare the properties of Thermoplastics with Thermosets. 04
(c) With a neat sketch, explain the manufacturing of PS by the tower process. 07
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OR
(c) Give the structure and list the properties and applications of Polyacetal. 07
Q.3 (a) Define i) Crystallisation ii) Distillation iii) Absorption 03
(b) List the properties and applications of PC. 04
(c) With a neat sketch explain the process for manufacturing of isotactic PP. 07
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OR
Q.3 (a) Write the structure and list the properties of PPS. 03
(b) List the properties and applications of PVC. 04
(c) With a neat sketch explain the manufacturing of Nylon 6. 07
Q.4 (a) Compare the properties of LDPE with HDPE. 03
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(b) Enlist the properties and applications of PET. 04
(c) With a neat flow diagram, explain the High Pressure process to manufacture LDPE. 07
OR
Q.4 (a) List the applications of HDPE. 03
(b) List the properties and applications of PEEK. 04
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(c) Explain the manufacturing of PC by phosgenation process. 07
Q.5 (a) List the applications of Nylons. 03
(b) List the properties and applications of PS. 04
(c) With a neat sketch explain the manufacturing of PVC by suspension polymerization. 07
OR
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Q.5 (a) List the properties and applications of PTFE. 03
(b) Explain the manufacturing of Nylon 66. 04
(c) Draw the structure and list the properties and applications of ABS. 07
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