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Configurational-conformational statistics of stereoirregular polystyrene

✍ Scribed by Zhiping Zhou; Deyue Yan

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
292 KB
Volume
5
Category
Article
ISSN
1022-1344

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✦ Synopsis

Abstract

The dependence of the configurational‐conformational characteristics, such as the mean‐square end‐to‐end distance, the mean‐square radius of gyration, and the temperature coefficient of the stereoirregular polystyrene chains on the fraction of meso dyads, P~m~ was investigated, using the periodic condition method. The calculation shows that polystyrene has the most compact chain when P~m~ = 0.7, and the temperature coefficient of the characteristic ratio of the mean‐square end‐to‐end distance reaches the minimum, −0.89 × 10^−3^ K^−1^, at P~m~ = 0.5. The theoretical result of the mean‐square radius of gyration for atactic polystyrene, 〈S^2^〉^1/2^ = 0.2245 M^0.5106^ shows good agreement with the experimental measurement in both bulk amorphous state and θ‐solvent.

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