GTU BE 8th Semester 2182302 Polymer Alloys and Blends Summer 2018 Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VIII (NEW) – EXAMINATION ? SUMMER 2018
Subject Code: 2182302 Date: 04/05/2018
Subject Name: Polymer Alloys and Blends
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) Define a) Polymer alloy b) Polymer blend c) Engineering
plastics
03
(b) What are the reasons for blending. 04
(c) List the steps in designing a polymer blend. 07

Q.2 (a) What are Thermoplastic Elastomer? List its types. 03
(b) Explain briefly about PVC/ABS blends. 04
(c) List the methods of blending. Explain mechanical mixing
in detail.
07
OR
(c) Write a short note on polymer blends used in cable
industries.
07
Q.3 (a) What is a compatibilizer? Explain the compatibilization
mechanism using specific interactive group.
03
(b) List the advantages and disadvantages of Thermoplastic
Elastomer.
04
(c) Write a short note on blends of PC. 07
OR
Q.3 (a) Discuss about Noryl Blends. 03
(b) Explain polymer-polymer miscibility by thermodynamic
approach.
04
(c) Discuss briefly about how blend components are
selected.
07
Q.4 (a) List the applications of Thermoplastic Elastomer. 03
(b) Explain the solution mixing technique for preparing
polymer blends.
04
(c) Explain the Differential Scanning Calorimetry technique
to characterize a blend.
07
OR
Q.4 (a) What is reactive compatibilization? What are the
advantages of Reactive compatibilization?
03
(b) Explain briefly about Twin screw extruders and its
advantages in polymer mixing.
04
(c) Explain the Thermo Gravimetric Analysis to characterize
a blend.
07
Q.5 (a) Discuss briefly about properties and applications of
PVC/NBR blends.
03
(b) Write a short note on Inter Penetrating Networks 04
(c) Explain the construction and working of Two roll mill. 07

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VIII (NEW) – EXAMINATION ? SUMMER 2018
Subject Code: 2182302 Date: 04/05/2018
Subject Name: Polymer Alloys and Blends
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) Define a) Polymer alloy b) Polymer blend c) Engineering
plastics
03
(b) What are the reasons for blending. 04
(c) List the steps in designing a polymer blend. 07

Q.2 (a) What are Thermoplastic Elastomer? List its types. 03
(b) Explain briefly about PVC/ABS blends. 04
(c) List the methods of blending. Explain mechanical mixing
in detail.
07
OR
(c) Write a short note on polymer blends used in cable
industries.
07
Q.3 (a) What is a compatibilizer? Explain the compatibilization
mechanism using specific interactive group.
03
(b) List the advantages and disadvantages of Thermoplastic
Elastomer.
04
(c) Write a short note on blends of PC. 07
OR
Q.3 (a) Discuss about Noryl Blends. 03
(b) Explain polymer-polymer miscibility by thermodynamic
approach.
04
(c) Discuss briefly about how blend components are
selected.
07
Q.4 (a) List the applications of Thermoplastic Elastomer. 03
(b) Explain the solution mixing technique for preparing
polymer blends.
04
(c) Explain the Differential Scanning Calorimetry technique
to characterize a blend.
07
OR
Q.4 (a) What is reactive compatibilization? What are the
advantages of Reactive compatibilization?
03
(b) Explain briefly about Twin screw extruders and its
advantages in polymer mixing.
04
(c) Explain the Thermo Gravimetric Analysis to characterize
a blend.
07
Q.5 (a) Discuss briefly about properties and applications of
PVC/NBR blends.
03
(b) Write a short note on Inter Penetrating Networks 04
(c) Explain the construction and working of Two roll mill. 07

2
OR
Q.5 (a) Discuss about ABS copolymer. 03
(b) Write a short note on Scanning Electron Microscope (SEM).
04
(c) Explain the construction and working of a Banburry
mixture.
07
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