Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 8th Sem New 2182302 Polymer Alloys And Blends Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182302 Date:15/05/2019
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) What are Blends and Alloys? Differentiate between polymer
alloy and blend.
03
(b) List various steps to select the blend components. 04
(c) Define following
1. Interfacial adhesion 2. Immiscible polymer blend
3. Homologous Polymer blend 4. Compatible polymer blend
5. Compatibilizer 6. Metastable miscibility
7. IPN
07
Q.2 (a) Explain Compatibilization method using block and graft
copolymers.
03
(b) What are the reasons for making polymer blend? Discuss. 04
(c) Discuss various techniques for determination of polymer-
polymer miscibility.
07
OR
(c) Discuss with neat diagram working principal of SEM along
with sample preparation and advantages.
07
Q.3 (a) Which are the properties and applications of PC/ABS Blends?
Discuss.
03
(b) Explain working of Two roll mills in polymer mixing with neat
diagram.
04
(c) Discuss thermodynamics of polymer blends. Give Phase
diagram with LCST and UCST.
07
OR
Q.3 (a) What are composites? Give difference between alloys/blends
and composites.
03
(b) Explain the significance of Gas lattice model in blends. 04
(c) Writa a note on: Flory-Huggins theory 07
Q.4 (a) Describe the properties and application of PPO/HIPS blends. 03
(b) Which are the techniques used for the preparation of polymer
blends? Discuss.
04
(c) Describe Differential scanning Calorimeter (DSC) with neat
diagram.
07
OR
Q.4 (a) Write about PVC/ABS Blend. 03
(b) List various compatibilization methods for Polymer blends.
Discuss degree of compatibility.
04
(c) Explain Twin screw extruder and its importance in preparation
of polymer blends.
07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2182302 Date:15/05/2019
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) What are Blends and Alloys? Differentiate between polymer
alloy and blend.
03
(b) List various steps to select the blend components. 04
(c) Define following
1. Interfacial adhesion 2. Immiscible polymer blend
3. Homologous Polymer blend 4. Compatible polymer blend
5. Compatibilizer 6. Metastable miscibility
7. IPN
07
Q.2 (a) Explain Compatibilization method using block and graft
copolymers.
03
(b) What are the reasons for making polymer blend? Discuss. 04
(c) Discuss various techniques for determination of polymer-
polymer miscibility.
07
OR
(c) Discuss with neat diagram working principal of SEM along
with sample preparation and advantages.
07
Q.3 (a) Which are the properties and applications of PC/ABS Blends?
Discuss.
03
(b) Explain working of Two roll mills in polymer mixing with neat
diagram.
04
(c) Discuss thermodynamics of polymer blends. Give Phase
diagram with LCST and UCST.
07
OR
Q.3 (a) What are composites? Give difference between alloys/blends
and composites.
03
(b) Explain the significance of Gas lattice model in blends. 04
(c) Writa a note on: Flory-Huggins theory 07
Q.4 (a) Describe the properties and application of PPO/HIPS blends. 03
(b) Which are the techniques used for the preparation of polymer
blends? Discuss.
04
(c) Describe Differential scanning Calorimeter (DSC) with neat
diagram.
07
OR
Q.4 (a) Write about PVC/ABS Blend. 03
(b) List various compatibilization methods for Polymer blends.
Discuss degree of compatibility.
04
(c) Explain Twin screw extruder and its importance in preparation
of polymer blends.
07
2
Q.5 (a) Two miscible polymers A and B are blended in weight ratio of
30:70. If the glass transition Temperature, Tg of polymer A is
-10?C and that of polymer B is 80?C, calculate the Tg of the
blend.
03
(b) Discuss various blends used to improve barrier properties for
packaging applications.
04
(c) Describe the working of Banbury mixture with neat diagram. 07
OR
Q.5 (a) Write about Reactive Blending. 03
(b) Discuss fundamental principles for development of polymer
alloys and blends.
04
(c)
What is FTIR? Discuss working of FTIR and its applications.
07
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This post was last modified on 20 February 2020