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2003 Course Polymer Composites & Blends

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Total No. of Questions : 12] P1371 [Total No. of Pages : 3 [3764]-353 B.E. (Polymer Engg.) POLYMER COMPOSITES & BLENDS (2003 Course) (409363) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates : 1) Answers to the two sections should be written in separate books. 2) Draw neat diagrams wherever necessary. 3) Numbers to the right indicate full marks. 4) Assume suitable data, if necessary. 5) Use of logarithmic table, electronic pocket calculators is allowed. SECTION - I Q1) a) Discuss the role of polymeric modifier for achieving improvement in the Impact Strength, Heat Deflection temperature and Chemical Resistance, Flame resistance of the polymer blends. [8] b) Explain the merits and demerits of solution blending over melt blending. [8] c) Discuss the term polymer alloys. [2] OR Q2) a) Discuss with one example how to achieve the selection of the polymers to prepare the polymer blends. [6] b) Draw and explain in detail the schematic representation of the steps to be taken when developing polymer alloys and blends with a specified set of desired performance characteristics. [10] c) Discuss the term polymer blend. [2] Q3) a) Discuss Equilibrium Morphology and phase inversion concept in polymer blends. [8] b) Distinguish between Coupling agent Vs Compatibilizer. [8] OR P.T.O.

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