Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2017 Winter 8th Sem New 2182302 Polymer Alloys And Blends Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2182302 Date: 02/11/2017
Subject Name: Polymer Alloys and Blends
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.
MARKS
Q.1 (a) What are Blends and Alloys? Discuss. 03
(b) Which are the reasons to make Polymer alloy/blends? 04
(c) How scanning electron microscope (SEM) is working? Discuss with
neat diagram along with sample preparation and advantages.
07
Q.2 (a) Define the followings:
1) Homologous Polymer blend 2) Compatible polymers blend 3)
Immiscible polymer blends
03
(b) Which are the techniques used for the preparation of polymer blends?
Discuss.
04
(c) Discuss techniques for determination of polymer-polymer
miscibility.
07
OR
(c) Explain the Huggins-Flory theory for polymer blends. 07
Q.3 (a) Two miscible polymers A and B are blended in weight ratio of 40:60.
If the glass transition Temperature, Tg of polymer A is -10?C and that
of polymer B is 70?C, calculate the Tg of the blend.
03
(b) How to select the blend components? Explain. 04
(c) Explain thermodynamics of polymer blends. Give Phase diagram
with LCST and UCST.
07
OR
Q.3 (a) Define: Block copolymer, graft copolymer and Interpenetrating
Polymer Networks.
03
(b) Explain the significance of Gas lattice model in blends. 04
(c) Discuss properties and applications of PVC/NBR & PC/PBT. 07
Q.4 (a) Describe the properties and application of PPO/HIPS blends. 03
(b) Describe the working of Two roll mills in polymer mixing with neat
diagram.
04
(c) What is compatibilizer? List various compatibilization methods and
explain addition block and graft copolymerization method.
07
OR
Q.4 (a) Write about PVC/ABS Blend. 03
(b) Discuss various blends used to improve barrier properties for
packaging applications.
04
(c) Describe Differential scanning Calorimeter (DSC) with neat diagram. 07
Q.5 (a) What are composites? Give difference between alloys/blends and
composites.
03
(b) Discuss Interfacial Adhesion and Degree of compatibility. 04
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VIII (NEW) EXAMINATION ? WINTER 2017
Subject Code: 2182302 Date: 02/11/2017
Subject Name: Polymer Alloys and Blends
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.
MARKS
Q.1 (a) What are Blends and Alloys? Discuss. 03
(b) Which are the reasons to make Polymer alloy/blends? 04
(c) How scanning electron microscope (SEM) is working? Discuss with
neat diagram along with sample preparation and advantages.
07
Q.2 (a) Define the followings:
1) Homologous Polymer blend 2) Compatible polymers blend 3)
Immiscible polymer blends
03
(b) Which are the techniques used for the preparation of polymer blends?
Discuss.
04
(c) Discuss techniques for determination of polymer-polymer
miscibility.
07
OR
(c) Explain the Huggins-Flory theory for polymer blends. 07
Q.3 (a) Two miscible polymers A and B are blended in weight ratio of 40:60.
If the glass transition Temperature, Tg of polymer A is -10?C and that
of polymer B is 70?C, calculate the Tg of the blend.
03
(b) How to select the blend components? Explain. 04
(c) Explain thermodynamics of polymer blends. Give Phase diagram
with LCST and UCST.
07
OR
Q.3 (a) Define: Block copolymer, graft copolymer and Interpenetrating
Polymer Networks.
03
(b) Explain the significance of Gas lattice model in blends. 04
(c) Discuss properties and applications of PVC/NBR & PC/PBT. 07
Q.4 (a) Describe the properties and application of PPO/HIPS blends. 03
(b) Describe the working of Two roll mills in polymer mixing with neat
diagram.
04
(c) What is compatibilizer? List various compatibilization methods and
explain addition block and graft copolymerization method.
07
OR
Q.4 (a) Write about PVC/ABS Blend. 03
(b) Discuss various blends used to improve barrier properties for
packaging applications.
04
(c) Describe Differential scanning Calorimeter (DSC) with neat diagram. 07
Q.5 (a) What are composites? Give difference between alloys/blends and
composites.
03
(b) Discuss Interfacial Adhesion and Degree of compatibility. 04
2
(c) Write a note on : Twin screw extruder 07
OR
Q.5 (a) Which are the properties and applications of PC/ABS Blends?
Discuss.
03
(b) Explain Melt Blending in detail. 04
(c) Describe the working of Banbury mixture with neat diagram. 07
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This post was last modified on 20 February 2020