Download SGBAU B-Tech 8th Sem Poly Plast Polymer Viscoelasticity n Rheology Question Paper

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B.Tech. Eighth Semester

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11147 : Polymer Viscoelasticity & Rheology

Time : Three Hours Max. Marks : 80

Notes:

1. Answer three questions from Section A and three questions from Section B.
2. Due credit will be given to neatness and adequate dimensions.

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3. Assume suitable data wherever necessary.
4. Illustrate your answer with the help of neat sketches.
5. Discuss the reaction, mechanism wherever necessary.
6. Use of pen Blue/Black ink/refill only for writing the answer book.

SECTION - A

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1. a) Discuss assemblage or state of aggregation in polymers. 6
   b) Differentiate between state of aggregation and phase states of matter. 7
   OR
2. a) Describe various types of relaxation processes in polymers? 6
   b) What is rubber like deformation in polymer? Explain in detail. 7

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3. Explain the various experimental techniques to determine the glass transition temperature. 14
   OR
4. Define & discuss the following terms with suitable examples: - 14
   i) Glass transition temperature ii) Crystallization
5. a) Define & explain the following terms: - 7
   

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   i) Shear modulus ii) Young's modulus
   iii) Bulk modulus
   b) Discuss various types of viscosity & their relations. 6
   OR
6. Explain viscoelastic behaviour of polymers by both Maxwell's & Kelvin model. 13

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SECTION-B

1. a) What do you mean by fluid? Discuss the types of fluid & give examples of fluid. 7
   b) What do you mean by Rheology? Give it's introduction and basic concept, with few examples. 7
   OR
2. a) Explain the dependency of viscosity on temperature. 7
   

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   b) Explain shear stress & shear rate of fluid flowing through channel. 7
3. a) Explain the principle, working and application of capillary rheometer. 6
   b) Explain entanglement concept in detail. 7
   OR
4. Discuss DeBye Bucche theory of viscosity of dilute solution in detail. 13

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5. a) What are assumptions given by Einstein Theory? 5
   b) Explain the effect of rheology during injection moulding of polymers? 8
   OR
6. a) Discuss the principle, working and significance of Bubble inflation rheometer. 7
   b) Explain the rheological properties of blown film extrusion of polymers. 6

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