Download GTU BE/B.Tech 2019 Summer 7th Sem New 21723032172312 Additives And Compounding Of Plastics Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 7th Sem New 21723032172312 Additives And Compounding Of Plastics Previous Question Paper

1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VII(NEW) EXAMINATION ? SUMMER 2019
Subject Code:2172303/2172312 Date:14/05/2019

Subject Name:Additives and Compounding of Plastics

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) Define Additives.List the additives use for plastics. 03
(b) Compare: Additives and Compounding 04
(c) Give detailed classification of Additives. 07

Q.2 (a) Define compounding. Which are the reasons for compounding? 03
(b) Define flame retardants? Explain the mechanism of functioning of
flame retardants.
04
(c) Discuss in detail the construction and working of ribbon blender
with a neat diagram.
07
OR
(c) Define fillers. Give classification and function of fillers in detail. 07
Q.3 (a) Define Chemical and Physical Blowing agents 03
(b) Define plasticizers. List the function of plasticizers. 04
(c) List the technological requirements of additives 07
OR
Q.3 (a) Define Impact modifiers. State the function and examples of
impact modifiers.
03
(b) Explain anti-slip additives with examples. 04
(c) Explain the construction and working of a high speed mixture with
a neat diagram.
07
Q.4 (a) Define nucleating agent? Give examples of it. 03
(b) Compare: Dyes and Pigments 04
(c) Define Anti-oxidants. Explain about it in detail 07
OR
Q.4 (a) Write note on conductive fillers 03
(b) Write a short note on theory of mixing 04
(c) Define Heat stabilizer. Explain role of stabilizer in plastic in detail. 07
Q.5 (a) List the limitations of mixing theory 03
(b) Short note on Anti blocking agent. 04
(c) Explain the construction and working of banbury mixer with a neat
sketch.
07
OR

Q.5 (a) Explain continuous and batch type mixing process 03
(b) Explain the purpose of a mold release agent 04
(c) Explain the construction and working of a two roll mill. 07

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