Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2162602 Synthetic Rubbers Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2162602 Date:20/11/2018
Subject Name: Synthetic Rubbers
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.
Q.1 (a)
Give the name of monomers and structure of Propylene Oxide rubber (GPO).
03
(b)
Write about basic catalyst systems and their importance for synthesis of Isoprene rubber.
04
(c) Explain the manufacturing Process of Butyl Rubber. 07
Q.2 (a)
Mention the important grades of Fluorocarbon Elastomer with their monomer
composition.
03
(b)
Give the synthesis reaction for Polypentenamer.
04
(c)
Polymerization temperature is an important variable in determining the character of
Polychloroprene rubber?. Justify the statement.
07
OR
(c) Explain the Manufacturing Process of Neoprene Rubber. 07
Q.3 (a)
Give the general synthesis reaction for Polysulfide rubber.
03
(b)
Name the rubber which is used in manufacturing of soft contact lenses. Why?
04
(c)
Write the beneficial properties and applications of Ethylene Propylene Diene Methylene
Rubber (EPDM).
07
OR
Q.3 (a)
How the rubberiness is achieved in Hypalon?
03
(b) Write about the Abbreviation and structural formula for Epichlorohydrin
terpolymer.
04
(c)
Which characteristics are required for third monomer used in synthesis of Ethylene
Propylene Diene Methylene Rubber (EPDM)? Write their name, structure and give
comparison between them.
07
Q.4 (a) Why copolymerize the Styrene and Butadiene rather than blend the
homopolymers?
03
(b) Draw the flow diagram of Batch process of Styrene butadiene rubber (SBR). 04
(c) Explain the Manufacturing Process of Nitrile Rubber. 07
OR
Q.4 (a) Write the Disadvantages of Carbon black Master batch Styrene Butadiene
Rubber.
07
(b) Write a brief note on Oil Extended Styrene Butadiene Rubber (OESBR). 07
Q.5 (a)
Give any two important application of Ethylene Vinyl Acetate (EVA).
03
(b) Mention the important grades of Fluorocarbon Elastomer with their monomer
composition.
04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2162602 Date:20/11/2018
Subject Name: Synthetic Rubbers
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.
Q.1 (a)
Give the name of monomers and structure of Propylene Oxide rubber (GPO).
03
(b)
Write about basic catalyst systems and their importance for synthesis of Isoprene rubber.
04
(c) Explain the manufacturing Process of Butyl Rubber. 07
Q.2 (a)
Mention the important grades of Fluorocarbon Elastomer with their monomer
composition.
03
(b)
Give the synthesis reaction for Polypentenamer.
04
(c)
Polymerization temperature is an important variable in determining the character of
Polychloroprene rubber?. Justify the statement.
07
OR
(c) Explain the Manufacturing Process of Neoprene Rubber. 07
Q.3 (a)
Give the general synthesis reaction for Polysulfide rubber.
03
(b)
Name the rubber which is used in manufacturing of soft contact lenses. Why?
04
(c)
Write the beneficial properties and applications of Ethylene Propylene Diene Methylene
Rubber (EPDM).
07
OR
Q.3 (a)
How the rubberiness is achieved in Hypalon?
03
(b) Write about the Abbreviation and structural formula for Epichlorohydrin
terpolymer.
04
(c)
Which characteristics are required for third monomer used in synthesis of Ethylene
Propylene Diene Methylene Rubber (EPDM)? Write their name, structure and give
comparison between them.
07
Q.4 (a) Why copolymerize the Styrene and Butadiene rather than blend the
homopolymers?
03
(b) Draw the flow diagram of Batch process of Styrene butadiene rubber (SBR). 04
(c) Explain the Manufacturing Process of Nitrile Rubber. 07
OR
Q.4 (a) Write the Disadvantages of Carbon black Master batch Styrene Butadiene
Rubber.
07
(b) Write a brief note on Oil Extended Styrene Butadiene Rubber (OESBR). 07
Q.5 (a)
Give any two important application of Ethylene Vinyl Acetate (EVA).
03
(b) Mention the important grades of Fluorocarbon Elastomer with their monomer
composition.
04
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(c)
Silicon rubber is the versatile Rubber.? Justify the statement.
07
OR
Q.5 (a) Mention the limitations of Polybutadiene Rubber (PBR). 03
(b) Give the general properties of Fluororubber (FKM). 04
(c)
Discuss about the Mixing operation, Processing Problem and their remedies for Silicone
rubber.
07
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This post was last modified on 20 February 2020