Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 5th Sem New 2152306 Chemistry Of Plastic Materials Previous Question Paper
1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2152306 Date:20/11/2018
Subject Name:Chemistry of Plastic Materials
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) (1) The Mn of Polypropylene is 106gm/mol. Find the
DPn.
(2) Define Homopolymer and co-polymer.
(3) List the generalized steps for polymerization.
03
(b) (1) Polymers formed by addition polymerization are less
crystalline than polymers formed by condensation
polymerization. Why?
(2) Give one example of alternating and block copolymers
with structure.
(3) What is difference between Buna-N and Buna-S
rubber?
(4) Give the classification of Polymer on the basis of
Polymerization process.
04
(c) What is a Polymer? Explain Addition and Condensation
Polymerization with suitable example & Enlist
polymerization techniques.
07
Q.2 (a) Short note on: Natural Polymer Starch and Lignin. 03
(b) Give chemical structure of PTFE. Discuss the properties
of PTFE.
04
(c) Give ten differences between Thermoplastic and
Thermoset.
07
OR
(c) What is functionality? State the functionality of the
monomers: styrene, pentaerythritol, 1, 4-butane diol,
ethylene glycol.
07
Q.3 (a) Define : Thermoplastic ,Thermoset and Polymer 03
(b) Explain about addition polymerization with example. 04
(c) Give classification of Polymer in detail with example. 07
OR
Q.3 (a) Write chemistry of formation of Melamine Formaldehyde
(MF)
03
(b) Explain the manufacturing process of MF with flow
diagram.
04
(c) Discuss Carothers? Equation in detail. 07
Q.4 (a) Give chemical structure of the following polymer:
(1) PE (2) PVC (3) ABS
03
(b) Explain in brief about Tapping (Extraction) of Latex.
04
(c) Explain the mechanism of Anionic addition
polymerization in detail.
07
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1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?V (NEW) EXAMINATION ? WINTER 2018
Subject Code:2152306 Date:20/11/2018
Subject Name:Chemistry of Plastic Materials
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) (1) The Mn of Polypropylene is 106gm/mol. Find the
DPn.
(2) Define Homopolymer and co-polymer.
(3) List the generalized steps for polymerization.
03
(b) (1) Polymers formed by addition polymerization are less
crystalline than polymers formed by condensation
polymerization. Why?
(2) Give one example of alternating and block copolymers
with structure.
(3) What is difference between Buna-N and Buna-S
rubber?
(4) Give the classification of Polymer on the basis of
Polymerization process.
04
(c) What is a Polymer? Explain Addition and Condensation
Polymerization with suitable example & Enlist
polymerization techniques.
07
Q.2 (a) Short note on: Natural Polymer Starch and Lignin. 03
(b) Give chemical structure of PTFE. Discuss the properties
of PTFE.
04
(c) Give ten differences between Thermoplastic and
Thermoset.
07
OR
(c) What is functionality? State the functionality of the
monomers: styrene, pentaerythritol, 1, 4-butane diol,
ethylene glycol.
07
Q.3 (a) Define : Thermoplastic ,Thermoset and Polymer 03
(b) Explain about addition polymerization with example. 04
(c) Give classification of Polymer in detail with example. 07
OR
Q.3 (a) Write chemistry of formation of Melamine Formaldehyde
(MF)
03
(b) Explain the manufacturing process of MF with flow
diagram.
04
(c) Discuss Carothers? Equation in detail. 07
Q.4 (a) Give chemical structure of the following polymer:
(1) PE (2) PVC (3) ABS
03
(b) Explain in brief about Tapping (Extraction) of Latex.
04
(c) Explain the mechanism of Anionic addition
polymerization in detail.
07
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2
OR
Q.4 (a) Calculate the number average degree of polymerisation of an
equimolecular mixture of hexamethylenediamine and adipic
acid for the extents of reaction 0.4 and 0.8.
03
(b) What is natural rubber? Give the structure of polyisoprene. 04
(c) Explain various types of bonding exist in polymers with
example.
07
Q.5 (a) In the polymerisation of ?-hydroxy caproic acid,
HO(CH2)5COOH, a 2% impurity present. Calculate the
degree of polymerisation of polymer formed.
03
(b) What is compounding. Explain vulcanization of rubber in
brief.
04
(c) Derive the following equation for free radical polymerization
Rp= Kp (Kd
1/2
/Kt
1/2
){( f [I]
1/2
) [M]}
07
OR
Q.5 (a) Derive the equation between number average degree of
polymerisation (P) and Kinetic chain length (?).
03
(b) Discuss chemistry, properties and application of HDPE. 04
(c) Write structure, properties, and application of chlorinated
rubber.
07
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This post was last modified on 20 February 2020