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2003 Course Speciality Polymers (Elective)

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Total No. of Questions : 12] [Total No. of Pages : 3 [3664] - 304 P 1215 B.E. (Polymer) ELECTIVE - SPECIALTY POLYMERS (2003 Course) Time : 3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to Section - I and Section - II should be written on separate answer books. 2) Solve 3 questions from Section - I and 3 questions from Section - II. 3) Neat diagrams must be drawn wherever 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) What are liquid crystalline polymers? Give examples of liquid crystalline polymers. [4] b) Write a short note on Classification of Liquid Crystalline Polymers. [10] c) Briefly comment on structural factors that cause liquid crystalline behavior. [4] OR Q2) a) Differentiate between Thermotropic and Lyotropic Liquid crystalline polymers? [4] b) Between Aliphatic and Wholly Aromatic polyamides which one are liquid [4] crystalline polymers? Justify your answer. c) Enlist various examples and applications of liquid crystalline polymers. [6] d) State typical characteristics of liquid crystalline polymers. Q3) a) [4] What are conducting polymers? Give two examples of conducting polymers. [4] b) Enlist the various applications of conducting polymers. [6] c) Write a short note on Band theory of conducting polymers. [6] OR P.T.O. Q4) a) Write a short note on use of conducting polymers in rechargeable batteries. [6] b) What are the important properties of conducting polymers? [6] c) Explain in brief Doping process and its various types. [4] Q5) a) What are heat resistant polymers? Give two examples and draw their repeating unit structures. [6] b) Comment on Structural features of heat resistant polymers. [4] c) Write a short note on factors affecting heat resistance of polymers. [6] OR Q6) a) Enlist various applications of heat resistant polymers. [6] b) Write a short note on Thermal behavior of heat resistant polymers. [6] c) Write down applications of poly(ether ether ketone) i.e. PEEK. [4] SECTION - II Q7) a) What are photo-resists? List various types of photo-resists and briefly explain their working. [6] b) Give examples of polymeric photo-resists. List the applications of photoresists polymers. [6] c) Briefly explain Photolithography process. [4] OR Q8) a) Write short note on mechanisms to impart selectivity to polymeric membranes. [6] b) What are the different methods to manufacture membranes? [6] c) Write down various applications of polymeric membranes. [4] Q9) a) Write a short notes on [12] i) ii) b) Biocatalysts, Biodegradable polymers. What are Biomaterials? Enlist the factors affecting degree of performance of biomaterials. Give examples of Biomaterials. [6] OR [3664] - 304 -2- Q10)a) Write short note of Polymers in i) b) Drug Release systems ii) [12] Polymers in Surgical applications. What are the limitations of Biomaterials? [6] Enlist merits, demerits and advantages of Polymer concretes. [6] b) What are the ingredients present in polymer concrete. [4] c) Write a short note on materials used in communication. [6] Q11)a) OR Q12)a) Enumerate various polymers used in construction and agricultural applications. [6] b) Write short note on polymers in Mulches and Green Houses. [6] c) Briefly explain role of polymers in fiber optics. [4] [3664] - 304 -3-

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