POLYMER BLENDS AND COMPOSITES — DU B.Sc. Polymer Science Previous Year Question Papers

Polymer Blends and Composites B.Sc. (H) Polymer Science - UGCF Attempt four questions in all. Draw neat and labelled diagram wherever necessary All parts of a single question should be attempted at one place\ in continuation. (.a)Whatarethediffertncesbetweenpolymerblendsandpolymer.alloys? (c) Explain Flory-Huggins theory of polymer blends. (a) Describe the methods of p.olymer blending` (c) Write short notes on (1) UCST and, (2) LCST a) Discuss the characterization of polymer blend by viscosity method. (c) Explain how do you determine the miscibility.of a polymer blend using DSC. (a) Discuss the differences between thermoplastic matrix and high-performance thermoset. (b) Discuss various factors affecting reinforcements. (c) What is dispersed phase in polymer composite? Explain reinforcing and non-reinforcing fillers with suitable examples. (a) Describe reaction transfer molding for polymer composite, (b) Derive the "Rule of mixtures" for a unidirectional fibre composite. (c) Write a short note on (a) Prepreg technology (b) Filament winding process (c) Gibb's phase rule