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2003 Course Rubber Technology (Elective)

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Total No. of Questions : 6] P1190 [Total No. of Pages :3 [3664] - 298 B.E. (Polymer) RUBBER TECHNOLOGY (2003 Course) (Elective) Time : 3 Hours] Instructions to the candidates: 1) 2) 3) 4) [Max. Marks:100 Question Nos. 1 and 4 are compulsory. Out of the remaining attempt 2 questions from Section I and 2 questions from Section II. Answers to the two sections should be written in separate books. Figures to the right indicate full marks. Assume suitable data, if necessary. SECTION - I Q1) a) b) What are the molecular-structure requirements for a material to act as a rubber? [8] Explain the various stages involved in the raw rubber technology. [8] OR a) Explain the various stages involved in latex technology. b) Write a short note on swelling of rubbers by liquids. What influence does fillers have on the swelling of rubbers. [8] Q2) a) What are the different types of C-blocks? Differentiate between them.[6] b) Explain the properties of C-block. w.r.t. i) ii) iii) iv) c) [8] [8] Particle size or surface area. Structure. Physical and chemical nature of the surface and Particle Porosity. Write a short note on Peptisers . [3] OR a) Explain the effect of C-block on the properties of rubber. [6] P.T.O.

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