Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3152609 Thermoplatic Elastomers And Polymer Blends Previous Question Paper
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3152609 Date:01/02/2021
Subject Name:Thermoplatic Elastomers & Polymer Blends
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q. 1 (a) Define the term Thermoplastic Elastomer (TPE). How it works?
(03)
(b) Explain the simple melt mixing method for thermoplastic elastomer (04)
blend.
(c) `The largest application area for the Polyolefin Thermoplastic (07)
Elastomer is in the Automotive Market.' Justify the statement.
Q. 2 (a) Define the term Grafting. Which thermoplastic elastomer is produced (03)
by grafting?
(b) List the advantages of the polybutadiene ? styrene teleblock polymer. (04)
(c) Discuss in detail about compounding of thermoplastic styrene block (07)
copolymer (TPS).
Q. 3 (a) Describe the Thermoforming process for the Polyolefin Thermoplastic (03)
Elastomer.
(b) Explain the thermal properties of polyester thermoplastic elastomer.
(04)
(c) Discuss the Dry Blending method for thermoplastic styrene block (07)
copolymer (TPS).
Q. 4 (a) Name the commercially available type of block copolymer with (03)
suitable example.
(b) Explain the mechanical properties of thermoplastic styrene block (04)
copolymer.
(c) Short note on: "B.F. Goodrich Telcar thermoplastic elastomer".
(07)
Q. 5 (a) What are the full forms of PTMEG and t-CD use in Polyester (03)
Thermoplastic Elastomer?
(b) Give the importance of Hytrel 10 MS grade for Polyester (04)
Thermoplastic Elastomer.
(c) List the reaction components of thermoplastic polyurethane elastomer. (07)
Explain it in detail.
Q. 6 (a) What are the functions of chain extender in thermoplastic polyurethane (03)
elastomer?
(b) Which properties or parameter affected by hardness in Thermoplastic (04)
Polyurethane Elastomer?
(c) Identify the injection molding conditions for Polyester Thermoplastic (07)
Elastomer and explain it.
Q. 7 (a) Summarize the applications of 1, 2- Polybutadiene thermoplastic (03)
elastomer.
(b) Explain the trans 1, 4- polyisoprene thermoplastic elastomer.
(04)
(c) Discuss in detail about compounding of Crosslinked Polyethylene (07)
(XLPE).
Q. 8 (a) Which are the polymerization variables affect the molecular structure (03)
of polyethylene in XLPE?
(b) Give the name of common comonomer are used with ethylene in XLPE (04)
synthesis.
(c) Short note on: "NBR-PVC blends".
(07)
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This post was last modified on 04 March 2021