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2003 Course Speciality Polymers (Elective)

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Total No. of Questions : 12] P1565 [Total No. of Pages : 4 [3764]-362 B.E. (Polymer) SPECIALITY POLYMERS (2003 Course) (Elective) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answer 3 questions from Section-I and 3 questions from Section-II. 2) Answers to the two sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right indicate full marks. 5) Your answers will be valued as a whole. 6) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 7) Assume suitable data, if necessary. SECTION - I Q1) a) Define Liquid Crystalline Polymers. Give their classification. [5] b) List a few commercial Liquid Crystalline Polymers. [3] c) What is a mesophase? [2] d) List and show pictorially different types of mesophases. [4] e) Explain in brief structural factors responsible for liquid crystalline behaviour. [4] OR Q2) a) What is a mesogen? [2] b) Classify LCP s based on presence of mesogen in a chain. Give suitable examples. [6] c) Draw typical structures of MCLCP and SCLCP. [6] d) State the properties of LCP s. [4] P.T.O.

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