Download GTU BE/B.Tech 2019 Winter 5th Sem New 2153606 Polymer And Rubber Material Ii Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Winter 5th Sem New 2153606 Polymer And Rubber Material Ii Previous Question Paper

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ? V (New) EXAMINATION ? WINTER 2019
Subject Code: 2153606 Date: 29/11/2019

Subject Name: Polymer & Rubber Material-II
Time: 10:30 AM TO 01:00 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) Give the Name of Modified alkyds 03
(b) Name the polymer with structure for following applications and give
reason for choice: mold release agent & mattress
04
(c) Write a short note on alkyd resin. Explain with types. 07

Q.2 (a) Explain CNSL Resin 03
(b) Write An Application & Properties of polyamides. 04
(c) Write a short note on synthesis and applications of Amino resin

07
OR
(c) Why curing is important in case of thermosets? Discuss briefly the
mechanism of curing of epoxy system with various curing agents
07
Q.3 (a) Compare sulfur vulcanization vs peroxide vulcanization. 03
(b) Write an explanatory note on epoxy-novalac & epoxy-acrylate
system.
04
(c) Explain in short the vulcanization of rubber and also the cross
linking technology.
07
OR
Q.3 (a) What is fiber reinforced polyester? 03
(b) Write Application of UF & MF 04
(c) Thermoset polymers are very useful in the coating application.
Name a thermoset polymer used for this purpose in washing machine
application. Justify and describe the synthesis and properties of the
polymer
07
Q.4 (a) Write an explanatory note on epoxy-novalac & epoxy-acrylate
system.
03
(b) Write a Application of Novolac Resin 04
(c) Explain the synthesis; curing and applications of polyurethane resins 07
OR
Q.4 (a) Write unique properties polyurethane resins. 03
(b) Write application & Properties of Kevlar Fiber 04
(c) Explain the reaction mechanism between phenol and formaldehyde
and process of forming PF resins.
07
Q.5 (a) Write a Application of Epoxy Resin in Coating Industry. 03
(b) Why Thermosetting Polymers are Amorphous 04
(c) Explain the reaction mechanism between phenol and formaldehyde
and process of forming PF resins?
07
OR
Q.5 (a) Draw The Structure of Epoxy, MF, UF 03
(b) What is silicones rubber? Mention its important application 04
(c) Explain with example vulcanization & de-vulcanization of rubbers. 07

*************
FirstRanker.com - FirstRanker's Choice