Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 7th Sem New 2172312 Additives And Compounding Of Plastics Previous Question Paper
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172312 Date: 19/11/2018
Subject Name: Additives and Compounding of Plastics
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 additives and list various additives used to modify
optical properties and mechanical properties.
03
(b) What is the function of Impact modifier? Discuss with
suitable example.
04
(c) Discuss mechanism and types of Antioxidants used for
plastics.
07
Q.2 (a) Discuss Antistatic agent function and its types. 03
(b) With neat sketch discuss mechanism and working of Two roll
mill.
04
(c) List various types of plasticizers used in plastics and discuss
how addition of plasticizer affects Tg of PVC.
07
OR
(c) Discuss those additives which enhance the properties of waste
plastics and facilitate their recycling process.
07
Q.3 (a) How nucleating agent is useful for controlling crystalline
structure? Discuss.
03
(b) List various non intensive type mixers and explain any one
with neat diagram.
04
(c) With neat diagram explain working of twin screw extruder for
compounding.
07
OR
Q.3 (a) Write about Ribbon blender. 03
(b) Discuss types of flame retardants used in plastics. 04
(c) Define: Lubricants. Which are the types of Lubricants?
Explain with suitable examples.
07
Q.4 (a) How an Antiblocking additive works? Discuss. 03
(b) Give difference between single and twin screw extruder. 04
(c) How coupling agent works? Discuss its mechanism of
functions in the composites.
07
OR
Q.4 (a) Give function & types of blowing agents along with its
applications.
03
(b) Write a note on: Fillers and reinforcements 04
(c) With help of neat diagram explain the working of a Banbury
mixture used for compounding of plastics.
07
Q.5 (a) State various technological requirements of additives. 03
(b) Explain High speed mixer with a neat sketch. 04
(c) Explain UV stabilization mechanism along with its examples. 07
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Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VII (NEW) EXAMINATION ? WINTER 2018
Subject Code: 2172312 Date: 19/11/2018
Subject Name: Additives and Compounding of Plastics
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 additives and list various additives used to modify
optical properties and mechanical properties.
03
(b) What is the function of Impact modifier? Discuss with
suitable example.
04
(c) Discuss mechanism and types of Antioxidants used for
plastics.
07
Q.2 (a) Discuss Antistatic agent function and its types. 03
(b) With neat sketch discuss mechanism and working of Two roll
mill.
04
(c) List various types of plasticizers used in plastics and discuss
how addition of plasticizer affects Tg of PVC.
07
OR
(c) Discuss those additives which enhance the properties of waste
plastics and facilitate their recycling process.
07
Q.3 (a) How nucleating agent is useful for controlling crystalline
structure? Discuss.
03
(b) List various non intensive type mixers and explain any one
with neat diagram.
04
(c) With neat diagram explain working of twin screw extruder for
compounding.
07
OR
Q.3 (a) Write about Ribbon blender. 03
(b) Discuss types of flame retardants used in plastics. 04
(c) Define: Lubricants. Which are the types of Lubricants?
Explain with suitable examples.
07
Q.4 (a) How an Antiblocking additive works? Discuss. 03
(b) Give difference between single and twin screw extruder. 04
(c) How coupling agent works? Discuss its mechanism of
functions in the composites.
07
OR
Q.4 (a) Give function & types of blowing agents along with its
applications.
03
(b) Write a note on: Fillers and reinforcements 04
(c) With help of neat diagram explain the working of a Banbury
mixture used for compounding of plastics.
07
Q.5 (a) State various technological requirements of additives. 03
(b) Explain High speed mixer with a neat sketch. 04
(c) Explain UV stabilization mechanism along with its examples. 07
2
OR
Q.5 (a) Identify various materials selection as additives used in Gears
and discuss its function.
03
(b) What do you mean by dispersive and distributive mixing?
Discuss.
04
(c) Write a note on: Conductive additives 07
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This post was last modified on 20 February 2020