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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII(NEW) EXAMINATION - SUMMER 2019
Subject Code:2172605 Date:18/05/2019
Subject Name:Rubber Adhesion & Adhesion Science
Time:02:30 PM TO 05:00 PM Total Marks: 70
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Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 Answer the following. (14)
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- Define the term: (i) Cohesive, (ii) Primer.
- What do you mean by Mastics?
- Give the difference between Solvent based and Latex based adhesive.
- In which solvents NBR rubber is soluble?
- Why is Solution SBR differing from Emulsion SBR?
- List the name of resin which is used in Butyl and Polyisobutylene adhesive.
- Write the chemical name and structure of TDI.
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Q.2 (a) Give the comparison of Water based Vs. Solvent based Vs Hot melts adhesives. (07)
Q.2 (b) Describe in detail about the testing methods which are used to check rubber to metal bonding. (07)
OR
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(b) Write the advantages and disadvantages of adhesive bonding. (07)
Q.3 (a) Discuss in detail about mixing and processing techniques for Butyl rubber Adhesive. (07)
Q.3 (b) Short note on: “Pressure sensitive adhesives.” (07)
OR
Q.3 (a) Short note on: “Reclaimed rubber adhesive”. (07)
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Q.3 (b) Describe the resin functions in rubber based adhesives. (07)
Q.4 (a) Short note on: “Nitrile rubber adhesives.” (07)
Q.4 (b) List the applications of SBR solvent based adhesives. Explain anyone in detail. (07)
OR
Q.4 (a) Short note on: “Heat activated Nitrile Rubber Adhesive”. (07)
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Q.4 (b) Describe in detail about types of SBR which are used for adhesives purpose. (07)
Q.5 (a) Discuss the effects of compounding variables on Neoprene AF based adhesives. (07)
Q.5 (b) Describe in detail about the vulcanizing Natural rubber adhesive. (07)
OR
Q.5 (a) Describe in details about application methods of neoprene adhesives. (07)
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Q.5 (b) List the responsible features for the effectiveness of Isocyanate based adhesive. (07)
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