MELT ELASTICITY OF INCOMPATIBLE BLENDS OF POLY(BUTYLENE TEREPHTHALATE)(PBT) AND POLYAMIDE 6 (PA6)

被引：20
|
作者：
WAKITA, N
机构：
[1] Daicel Chemical Industries, Ltd, Research Center, Polymer Laboratory, Himeji, Hyogo, Aboshi‐ku
来源：
POLYMER ENGINEERING AND SCIENCE | 1993年 / 33卷 / 13期
关键词：
D O I：
10.1002/pen.760331302
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The extrudate swell and the dynamic rheological properties of poly(butylene terephthalate) (PBT) and polyamide 6 (PA6) binary blends were investigated at 240-degrees-C. The extrudate swell of the blend varies with the viscosity ratio and composition of constituents, and it is several times larger than that of homopolymers when the viscosity ratio of constituents is around unity. The dynamic oscillatory data could be interpreted by Oldroyd's emulsion model proposed by Graebling, et al. These results suggest that the extrudate swell is caused by the shape recovery of the dispersed particles. A semi-empirical method to estimate the terminal relaxation time with experimental data was introduced, and a clear correlation between the extrudate swell and the terminal relaxation time was obtained.
引用
收藏
页码：781 / 788
页数：8
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