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2003 Course Speciality Polymers

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Total No. of Questions : 12] [Total No. of Pages : 3 [3864]-392 P1316 B.E. (Polymer Engineering) SPECIALITY POLYMERS (2003 Course) Time : 3 Hours] [Max. Marks :100 Instructions to the candidates: 1) Answer any THREE questions from each section. 2) Neat diagrams must be drawn wherever necessary. 3) Figures to the right indicate full marks. 4) Use of logarithmic tables, slide rule, Mollier charts, electronic pocket calculator and steam tables is allowed. 5) Assume suitable data, if necessary. SECTION - I Q1) a) b) c) d) Q2) a) b) c) d) Q3) a) b) c) Define liquid crystalline polymers. Classify them. [5] What is the difference between lyotropic and thermotropic LCP s. [4] What are the structural factors responsible for liquid crystalline behaviour. Explain. [5] State the properties of LCP s. [4] OR What is a mesophase? [2] List and show pictorially different types of mesophases. [5] Enlist at least three commercially important liquid crystalline polymers. Give their applications. [5] What is a mesogen? Classify LCP s on the basis of presence of mesogen in a chain. Give suitable examples. [6] Draw structures of 5 conducting polymers. Name 3 conducting polymers and give their applications. Explain the band theory of conduction in conducting polymers. OR [5] [5] [6] P.T.O.

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