Structure and mechanical properties of poly(sulfone of bisphenol A)/poly(butylene terephthalate) blends

被引:4
作者
Retolaza, A
Eguiazábal, JI
Nazábal, J
机构
[1] EHU, UPV, Fac Ciencias Quim, Dept Ciencia & Tecnol Polimeros, San Sebastian 20080, Spain
[2] EHU, UPV, Fac Ciencias Quim, Inst Mat Polimer POLYMAT, San Sebastian 20080, Spain
关键词
poly(sulfone of bisphenol A); poly(butylene terephthalate); blends; morphology; mechanical properties;
D O I
10.1002/pi.1635
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Blends of poly(sulfone of bisphenol A) (PSU) with poly(butylene terephthalate) (PBT) were obtained by direct injection moulding across the composition range. The two components of the blends reacted slightly in the melt state, producing linear copolymers. The slight changes observed in the two glass transition temperatures indicate that the copolymers were present in the two amorphous phases of the blends. The observed reactions and the high viscosity of the matrix of the PSU-rich compositions led to a very fine morphology which could not be attained in the PBT-rich compositions due to the low viscosity of the matrix and the direct injection moulding procedure used. This procedure is fast and economically advantageous, but leads to poor mixing. The different morphologies influenced neither the modulus nor the yield stress, which tended to follow the rule of mixtures. However, the low fracture properties of the PBT-rich compositions contrasted with the ductility behaviour, and even the impact strength of the PSU-rich blends, which also tended to be proportional to the blend composition. (C) 2004 Society of Chemical Industry.
引用
收藏
页码:2107 / 2114
页数:8
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