Organic Chemistry (8th Edition)
Organic Chemistry (8th Edition)
8th Edition
ISBN: 9780134042282
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 27, Problem 28P
Interpretation Introduction

Interpretation:

Reason for configuration of a polymer of isobutylene is neither isotactic, syndiotactic, nor atactic has to be explained.

Concept Introduction:

Polymers:

Monomers combine together to form polymers.  Monomers are the repeating units of small molecules which link together to form polymers and the process is called as polymerization.

Two types of polymers:

  • Synthetic and biopolymers.
  • DNA is an example for biopolymer and these type of polymers are synthesized by cells.
  • Polymers synthesized by scientists are called synthetic polymers and some examples are nylon, polyester etc.

Isotactic polymer: Substituents will be on the same side of the chain.

Syndiotactic polymer: Substituents will be on the alternate side of the chain.

Atactic polymer: Substituents will be randomly oriented.

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11c. Nylon 6 and poly(ε-caprolactone) have similar polymer backbone structure with one carbonyl, 5 methylene and a heteroatom, nitrogen or oxygen, respectively. Each is able to undergo crystallization. However, their thermal transition temperature differs significantly. The glass transition temperature (Tg) for Nylon 6 is 52 °C, whereas the Tg for poly(εcaprolactone) is 112 degree lower than Nylon 6 at – 60 °C. Similarly, the melting temperature (Tm) for Nylon 6 is 223 °C, whereas the Tm for poly(εcaprolactone) is 60 °C. Briefly explain the significant differences in the thermal properties of these two polymers.

Chapter 27 Solutions

Organic Chemistry (8th Edition)

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