Materials Science and Engineering
Materials Science and Engineering
9th Edition
ISBN: 9781118324578
Author: Jr. William D. Callister
Publisher: WILEY
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Chapter 15.24, Problem 19QP

(a)

To determine

To do:

The following for branched and atactic poly (vinyl chloride) with a weight-average molecular weight of 1,00,000g/mol and linear and isotactic poly (vinyl chloride) with a weight-average molecular weight of 75,000g/mol :

  1. 1. To state the possibility to decide which polymer has a greater tensile modulus.
  2. 2. If it is possible to decide and give the reason for the same.
  3. 3. If it is not possible to decide and give the reason for the same.

(b)

To determine

To do:

The following for random styrene-butadiene copolymer having 5% of possible cross-linked sites and block styrene-butadiene copolymer having 10% of possible cross-linked sites:

  1. 1. To state the possibility to decide which polymer has a greater tensile modulus.
  2. 2. If it is possible to decide and give the reason for the same.
  3. 3. If it is not possible to decide and give the reason for the same.

(c)

To determine

To do:

The following for branched polyethylene having the number-average molecular weight of 1,00,000g/mol and atactic polypropylene having the number-average molecular weight of 1,50,000g/mol :

  1. 1. To state the possibility to decide which polymer has a greater tensile modulus.
  2. 2. If it is possible to decide and give the reason for the same.
  3. 3. If it is not possible to decide and give the reason for the same.

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