Download GTU BE/B.Tech 2019 Summer 6th Sem New 2163902 Nanopolymers And Nano Composites Question Paper

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Subject Code: 2163902

GUJARAT TECHNOLOGICAL UNIVERSITY

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SEMESTER-VI(NEW) — EXAMINATION — SUMMER 2019

Subject Name: Nanopolymers and Nano-composites

Time: 10:30 AM TO 01:00 PM

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

Q.1

1. (a) Mention Factors Affecting Tg and Tm. (at least five factors each) [MARKS 03]
2. (b) Explain: chain growth polymerization. [MARKS 04]

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3. (c) Classify Polymer on the basis of microstructure. [MARKS 07]

Q.2

1. (a) Differentiate Homopolymer and Heteropolymer. [MARKS 03]
2. (b) Classify Polymer on the basis of macrostructure. [MARKS 04]
3. (c) Explain polymer calcium carbonate. Describe its preparation and surface modification also mention and brief the techniques for fabrication. [MARKS 07]

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OR

1. (a) Explain the Formation of ordered polymer structure at the Interfaces. [MARKS 07]
2. (b) Write Down full form of MMT and explain it with structure. [MARKS 03]
3. (c) Explain Block Copolymers for ordered polymeric Nanostructures. [MARKS 04]

Q.3

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1. (a) What is polymer? Explain its structure, molecular arrangement and characteristics. [MARKS 07]

OR

1. (a) Define: Copolymer and hence classify it. [MARKS 03]
2. (b) Describe Biodegradable Layered Polymer Nanocomposites. [MARKS 04]
3. (c) Describe Glass Transition Temperature and Melting Point of Polymer. [MARKS 07]

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Q.4

1. (a) Define Polymer Clay Nanocomposite (With Types). [MARKS 03]
2. (b) Explain Optically Anisotropic Metal-Polymer Nanocomposites [MARKS 04]
3. (c) An alternating copolymer is known to have number avg. molecular weight 0f 250000 g/mol, and a Degree of polymerization 3500. If one of the repeat units is styrene, which of ethylene, propylene, tetrafluoroethylene, and vinyl chloride is the other repeat unit? Why? [MARKS 07]

OR

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1. (a) Explain number Avg. Molecular weight and Weight Avg. Molecular weight. [MARKS 03]
2. (b) Solve: Consider a polymer sample comprising of 5 moles of polymer molecules having molecular weight of 40.000 g/mol and 15 moles of polymer molecules having molecular weight of 30.000 g/mol. Calculate Mn, Mw. [MARKS 04]
3. (c) Explain Kinetics of Chain Growth Polymerization. [MARKS 07]

Q.5

1. (a) Explain Cryochemical Synthesis, Structure, and physicochemical of Metal-Containing Polymer. [MARKS 07]

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Date: 14/05/2019

Total Marks: 70

Q.5

1. (a) Explain Metal Containing Polymers Briefly. [MARKS 03]

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2. (b) Write a short note on Chemistry of Polymerization. [MARKS 04]
3. (c) Explain Kinetics and Reaction of Step Growth Polymerization. [MARKS 07]

OR

1. (a) Explain: Functionally Graded Ceramics. [MARKS 03]
2. (b) Define Silicon Nitride and Silicon Carbide Based Ceramics. [MARKS 04]

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3. (c) Write a Short Note on Nanophase ceramic composites. [MARKS 07]

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