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2003 Course Fiber Technology (Elective)

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Total No. of Questions : 12] [Total No. of Pages : 3 [3864] - 393 P 1286 B.E. (Polymer) FIBER TECHNOLOGY (Backlog) (2003 Course) (Elective) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to Section I and Section II should be written on separate answer book. 2) Solve 3 questions from Section I and 3 questions from Section II. 3) Neat diagrams should be drawn whenever necessary. 4) Figures to the right indicate full marks. 5) Assume suitable data, if necessary. 6) Use of electronic pocket calculator is allowed. SECTION - I Q1) a) b) c) Comment about molecular requirements of fiber forming polymers. [8] Write a short note on High Speed Spinning process in fiber manufacture. [5] Enlist advantages and drawbacks of synthetic fibers over natural fibers.[5] OR Q2) a) b) c) Explain the terms - Yarn, Filament, Tex, Denier, Tenacity, Staple fiber.[6] Write a short note on Melt Spinning process to manufacture fiber. [8] Comment on Effect of Spinning Speed on Morphology of fiber. [4] Q3) a) b) c) What are the various sources of natural and synthetic fibers? [6] What are the drawbacks of DEG presence in PET polymers? [4] What are the raw materials used to synthesize aromatic polyamide PPTA [2] (Kevlar )? Explain in brief Catalysts used in synthesis of PET by transesterification route. [4] d) OR Q4) a) b) c) d) What are the raw materials for obtaining PET and PBT fibers? [4] Explain how Viscose Rayon is obtained. [4] Enlist the factors which contribute to DEG formation in PET synthesis. [4] Comment on advantages and disadvantages of Integrated Continuous process used to synthesize Nylon6 polymer for fiber spinning application. [4] P.T.O.

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