GTU BE 6th Semester 2163902 Nanopolymers and Nano-composites Summer 2018 Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code:2163902 Date:01/05/2018
Subject Name:Nanopolymers and Nano-composites
Time:10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS
Q.1 (a) Differentiate step growth and chain growth polymerization. 03
(b) Explain in general: What is solid phase Cryochemical synthesis 04
(c) What is polymer? Explain its structure, molecular arrangement and
characteristics.
07

Q.2 (a) Describe chain growth polymerization including all the steps. 03
(b) Define Tg (glass transition temperature) and mention factors affecting
Tg
04
(c) Write a short note on metal nanoparticle formation. 07
OR
(c) Define molecular weight and degree of polymerization.

Molecular Weight 10
3
(g/mol)
Molecular Weight 10
3
(g/mol)
Solve:
Assume that the molecular weight distributions shown in Figure are for
poly(vinyl chloride). For this material, compute: (a) the number-average molecular weight, (b) the degree of polymerization (number avg. and weight avg.), and
07
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
5 10 15 20 25 30 35 40
Number
Fraction
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
0.3
5 10 15 20 25 30 35 40
Weight
Fraction 1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code:2163902 Date:01/05/2018
Subject Name:Nanopolymers and Nano-composites
Time:10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS
Q.1 (a) Differentiate step growth and chain growth polymerization. 03
(b) Explain in general: What is solid phase Cryochemical synthesis 04
(c) What is polymer? Explain its structure, molecular arrangement and
characteristics.
07

Q.2 (a) Describe chain growth polymerization including all the steps. 03
(b) Define Tg (glass transition temperature) and mention factors affecting
Tg
04
(c) Write a short note on metal nanoparticle formation. 07
OR
(c) Define molecular weight and degree of polymerization.

Molecular Weight 10
3
(g/mol)
Molecular Weight 10
3
(g/mol)
Solve:
Assume that the molecular weight distributions shown in Figure are for
poly(vinyl chloride). For this material, compute: (a) the number-average molecular weight, (b) the degree of polymerization (number avg. and weight avg.), and
07
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
5 10 15 20 25 30 35 40
Number
Fraction
0
0.02
0.04
0.06
0.08
0.1
0.12
0.14
0.16
0.18
0.2
0.22
0.24
0.26
0.28
0.3
5 10 15 20 25 30 35 40
Weight
Fraction
2 (c) the weight-average molecular weight.
Q.3 (a) Differentiate homopolymer and heteropolymer. 03
(b) Explain the formation of polyelectrolyte Gel-surfactant complexes 04
(c) Explain in detail processing of nanophase ceramic nano composite. 07
OR
Q.3 (a)Draw the Schematic diagram of MMT (natural smectic clay 2:1
phyllosilicates).
03
(b) Explain the structure of metal polymer complexes. 04
(c) Explain step growth polymerization and its kinetics. 07
Q.4 (a) Explain Copolymers and state its types. 03
(b) A polydisperse sample of polystyrene is prepared by mixing
three monodisperse samples in the following proportions:

Using this information, calculate the number-average molecular
weight, weight-average molecular weight, and PDI of the mixture.
2 g 10,000 molecular weight
1 g 10,000 molecular weight
1 g 50,000 molecular weight
04
(c) Explain the two biomedical applications in detail for use of metal
containing polymer.
07
OR
Q.4 (a) Differentiate between polymer and block copolymer 03
(b) Elaborate: block copolymers for ordered polymeric nanostructures. 04
(c) Classification of the polymers on the basis of the microstructure. 07
Q.5 (a) Define Nano cavities. 03
(b) Describe printing of organometallic polymers by soft lithography. 04
(c)Write a short note on polymer clay nanocomposites.
07
OR
Q.5 (a) What is the role of vacuum chamber in the synthesis of metal polymer
nanocomposite
03
(b) Explain briefly the formation of ordered polymer structures at
interfaces.
04
(c) Elaborate: polymer layered silicate nanocomposites. 07
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