Download SGBAU (Sant Gadge Baba Amravati university) B-Tech/BE (Bachelor of Technology) 6th Sem Poly Plast Elastomer Technology Previous Question Paper
11127 : Elastomer Technology
6 PP 02
P. Pa res : 2 AW - 3253
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Time : Three Hours . o 7 3 5 . Max. Marks : 80
Notes : 1. All question carry marks as indicated.
2. Answer three question from Section A and three question from Section B.
3. Due credit will be given to neatncss and adequate dimensions.
4. Assume suitable data wherever necessary.
5. Diagrams and chemical equations should be given wherever necessary.
6. Illustrate your answer necessary with the help of neat sketches.
7. Discuss the reaction. mechanism wherever necessary.
8. Use of pen Bluc/Black ink/rc?ll nnly for writing the answer book.
SECTION - A
l. a) Explain the process of storage. hardening and cr) stallization nfnatural rubber. 7
b) Discuss the mixing, forming and vulcanization manufacturing process sequence in rubber 7
industry.
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2. 3) De?ne the term elastomer. Discuss the collection of natural rubber and the properties of 7
raw natural rubber. Also give the van?ous applications of natural rubber.
b) Explain the mastication and compounding process for raw rubber. 7
3. a) De?ne the term 'Vulcanization of Ruhbcr'. Discuss the different non-sulfur methods of 7
rubber vulcanization.
b) Discuss the various factors and conditions affecting rate of vulcanization. 6
OR
4. a) Discuss in detail the reaction mechanism of vulcanization of rubber. 6
b) Explain the characteristic properties. and application of oil extended rubber. 7
5. What do you mean by rctrading of tyre ?? Discuss in detail the design aspects. consideration 13
and design pattern for tyre retrading.
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6. Explain the processing. properties and applications of followings : 13
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i) Nitrile Rubber
ii) SBR
7. a)
b)
8. a)
b)
9.
10.
11. a)
b)
12. a)
b)
SECTION - B
What are the variuus types of ?ller and reinforcement for plastics 1? Discuss the choice of
?lters and properties required for plastics compounding.
What are plasticizers 1? Discuss the effect m?addition nt?plasticizcr on the properties 01'
plastic materials.
OR
What do you mean by plastic additives " Discuss the different types ofadditivcs and their
role ir polymer compounding.
What 5 the selection criteria of lubricants for plastics ? ("live its various types with example.
Explain the properties, application and
i) U.V. Stabili7er
ii) Flame Retardant
iii) Toughening Agent
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Discuss the properties, application md wlvction criteria for the following additives by
giving example of each -
i) Foaming Agents
ii) Antiozonants
iii) Antistatic Agent
Discuss in detail the preparation. properties and application of animal glue and ?sh glue.
Explain the standard test methud ofI Jr shear strength for determining the strength of
adhesive.
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How ? ill yuu classify the polymer adhesiws '? Discuss in detail the structural requirement
ofpolymers to act as a adhesive for various sub
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This post was last modified on 10 February 2020