Interdiffusion in blends of deuterated polystyrene and poly(α-methylstyrene)

被引：19
|
作者：
Geoghegan, M
Jones, RAL
van der Grinten, MGD
Clough, AS
机构：
[1] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[2] Univ Surrey, Dept Phys, Guildford GU2 5XH, Surrey, England
来源：
POLYMER | 1999年 / 40卷 / 09期
关键词：
polymer blends; ion-beam profiling; interdiffusion;
D O I：
10.1016/S0032-3861(98)00456-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The differing glass transitions between deuterated polystyrene and poly(alpha-methylstyrene) are shown to have a profound effect on their interdiffusion coefficient. We have measured the interdiffusion coefficient as a function of concentration and temperature for two blends. The results can be interpreted in terms of the 'fast' theory of interdiffusion with the temperature dependence obtained from a Williams-Landel-Ferry (WLF) treatment. The intradiffusion coefficients of the two polymers have also been deduced by this analysis. It is found that the deuterated polystyrene has a much more concentration-dependent intradiffusion coefficient than the poly(alpha-methylstyrene). Thermodynamic slowing down is also observed in one blend. (C) 1999 Elsevier Science Ltd. All rights reserved.
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页码：2323 / 2329
页数：7
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