1. For polyphosphazene shown below, it has the number of repeat units N= 7500 and length I=1.53 Å.PolyphosphazeneRCalculate the followinga) Contour lengthb) 12 for a freely-jointed chainc) 12 for a free-rotation chaind) 12 for a restricted-rotation chainAssume that the bond angle is the average of different bond angles (i.e., average over the P-N=Pand N=P-N bonds) in the polymer backbone, and = 0.56.

Given, Number of repeat units, N = 7500 length, l = 1.53 Å

1. For polyphosphazene shown below, it has the number of repeat units N= 7500 and length / =1.53 Å. Polyphosphazene R R Calculate the following a) Contour length b) I2 for a freely-jointed chain c) l/2 for a free-rotation chain d) l² for a restricted-rotation chain

1. For polyphosphazene shown below, it has the number of repeat units N= 7500 and length / =1.53 Å. Polyphosphazene R R Calculate the following a) Contour length b) I2 for a freely-jointed chain c) l/2 for a free-rotation chain d) l² for a restricted-rotation chain

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter14: Rotational And Vibrational Spectroscopy

Section: Chapter Questions

Problem 14.96E

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Question

1. For polyphosphazene shown below, it has the number of repeat units N= 7500 and length I
=1.53 Å.
Polyphosphazene
R
Calculate the following
a) Contour length
b) <R?>12 for a freely-jointed chain
c) <R?>12 for a free-rotation chain
d) <R?>12 for a restricted-rotation chain
Assume that the bond angle is the average of different bond angles (i.e., average over the P-N=P
and N=P-N bonds) in the polymer backbone, and <cosq> = 0.56.

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