POLYMER TECHNOLOGY(PT) — DU B.Sc. Polymer Science Previous Year Question Papers

(a) Discuss the properties of aliphatic nylons. (b) Illustrate' chain branching mechanism of polyethylene. What are its corisequerices ? (c). Discuss electrical and thermal properties of (d) Illustrate the benelits of casting process of PIMA production (e) Compare the properties of HIPS and ABS. (1) Discuss properties of poly (vinyl alcohol). (g) Illustrate primary properties of phenolic resins which make them suitable for various applications.I, 2. (a) Höw do the"amide linkages in aliphatic' polyamides contribute to their properties ? (b) Discuss the preparation of resol resins. ,5 (c) Discuss properties of poly (vinyl acetate). 4 3. (a) Discuss Philips process for production of polyethylene. move si. (b) Discuss the production and purification of polypropylene. (c). How do properties, of (methyl methacrylate) (PMMA), differ from other acrylic polymers ? Explain,.. Te, Ji Pro 4. (á) Describe propérties-and applications of (c) List applications of unplasticized polyvinyl chloride (UPVC). 5. (a) Illustrate significance of the different unsomert structure red for production of (b) Discuss the curing and properties of resols. (c) Discuss the applications of polyurethane foams. 6. (a) Discuss preparation of epoxy polymers. 6 (b) Discuss methylol formation and condensation reactions in preparation of linear UF polymers. 5 (c) How do the properties of polystyrene change when it is prepared in the presence of polybutadiene.