Probing the Contraction and Association of Polystyrene Chains in Semidilute Solution by Non-Radiative Energy Transfer

✍ Scribed by Fangfang Tao; Xiaoliang Wang; Bo Che; Dongshan Zhou; Wei Chen; Gi Xue; Dawei Zou; Zuoxiu Tie

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 162 KB
• Volume: 29
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200700578

✦ Synopsis

Abstract

The interchain contraction and association of polystyrene in semidilute solution near the Θ temperature are studies using NET. The results reveal that during a drop of temperature, polystyrene chains pass through different states: a smooth change of conformation at temperatures above the Θ temperature, an accelerated contraction and association, aggregation of polymer chains, and then further continuous contraction below the Θ temperature. A pronounced hysteresis is observed during repeated heating. A viscosity study of the same solution was compared with the NET results. It indicates that NET can effectively be used to study conformational changes like contraction and association of polymer chains in a semidilute solution.

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