Stability of plastic deformation and toughness of polycarbonate blended with poly(acrylonitrile-butadiene-styrene) copolymer
Stability of plastic deformation and toughness of polycarbonate blended with poly(acrylonitrile-butadiene-styrene) copolymer
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DOI：
10.1016/0032-3861(95)95297-e
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发表时间：
1995
期刊：
影响因子：
4.6
通讯作者：
M. Ishikawa
中科院分区：
文献类型：
--
作者：
M. Ishikawa
通过平面应变状态下U形缺口棒材的三点弯曲试验，研究了双酚A聚碳酸酯(PC)与聚丙烯腈-丁二烯-苯乙烯(ABS)共聚物共混体系的塑性变形稳定性和韧性。当改性剂的含量超过一定的临界值时，PC/ABS共混物的变形由银纹形核的抑制转变为稳定的模式，这取决于改性剂的结合强度。结果表明，PC/ABS共混物的变形模式可用膨胀应力作用下预制孔洞区域的塑性变形失稳理论来解释。此外，韧性的改善对改性剂粘结强度的降低非常敏感，加入少量低粘结强度的改性剂可以有效地改善韧性。
Stability of plastic deformation and toughness of bisphenol-A polycarbonate (PC) blended with poly(acrylonitrile-butadiene-styrene) (ABS) copolymer have been studied by three-point bending tests of U-notched bars under plane strain state. The deformation of PC/ABS blends was transformed into a stable mode by depression of craze nucleation when the content of modifier was increased beyond a certain critical level which was dependent on the cohesive strength of the ABS modifier. It was concluded that the deformation mode of PC/ABS blends could be explained in terms of the theory of instability of plastic deformation in the region of pre-formed voids under dilatational stress. Furthermore, toughness improvement was found to be very sensitive to the decrease of cohesive strength of the modifier and was efficiently accomplished by the addition of a small amount of the modifier of low cohesive strength.