GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VII (NEW) EXAMINATION - WINTER 2018
--- Content provided by FirstRanker.com ---
Subject Code: 2172605/2172608 Date: 03/12/2018
Subject Name: Rubber Adhesion & Adhesion Science
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
--- Content provided by FirstRanker.com ---
Q.1 (a) What do you mean by mastics? (03)
(b) Define the term: (i) Tack, (ii) Adhesion. (04)
(c) Give the difference between Water based Vs solvent based adhesives. (07)
--- Content provided by FirstRanker.com ---
Q.2 (a) How is viscosity important for adhesives? Explain it. (03)
(b) Describe the types of joints. (04)
(c) Explain the pressure sensitive rubber based adhesives. (07)
OR
(c) Discuss about function of resins in rubber based adhesives. (07)
--- Content provided by FirstRanker.com ---
Q.3 (a) Write the two component solvent mixtures for preparing Nitrile rubber adhesive. (03)
(b) Mention the specific applications of NBR adhesive. (04)
(c) Describe in detail about vulcanizing NR based adhesive with suitable application. (07)
OR
Q.3 (a) Discuss the Reclaimed rubber adhesive. (03)
--- Content provided by FirstRanker.com ---
(b) Write the importance of reinforcing agents in natural rubber adhesive. (04)
(c) Discuss in detail about compounding of Nitrile Rubber adhesive. (07)
Q.4 (a) List out the advantages of Neoprene rubber adhesives. (03)
(b) Describe the characteristics of neoprene types used in latex adhesives. (04)
(c) Explain the reasons for the effectiveness of polyurethane and isocynate based adhesives. (07)
--- Content provided by FirstRanker.com ---
OR
Q.4 (a) Write the suitable SBR adhesive formulation for sprayable adhesive application. (03)
(b) List the properties of SBR in adhesives. (04)
(c) Describe in details about application methods of neoprene adhesives. (07)
Q.5 (a) Write the chemical name and structure of MDI and TDI (03)
--- Content provided by FirstRanker.com ---
(b) Give the advantages of Cynoacrylate adhesives. (04)
(c) Describe the mixing and processing techniques for Butyl caulks and mastics. (07)
OR
Q.5 (a) Name the curing system for butyl rubber adhesive. (03)
(b) Discuss about the polymeric additives use for butyl and polyisobutylene base adhesive. (04)
--- Content provided by FirstRanker.com ---
(c) Explain the properties of Cynoacrylate adhesive bonds. (07)
This download link is referred from the post: GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---