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Probing the Contraction and Association of Polystyrene Chains in Semidilute Solution by Non‐Radiative Energy Transfer
Author(s) -
Tao Fangfang,
Wang Xiaoliang,
Che Bo,
Zhou Dongshan,
Chen Wei,
Xue Gi,
Zou Dawei,
Tie Zuoxiu
Publication year - 2008
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.200700578
Subject(s) - contraction (grammar) , polystyrene , polymer , drop (telecommunication) , materials science , radiative transfer , thermodynamics , chemistry , polymer chemistry , optics , composite material , physics , medicine , telecommunications , computer science
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.