PA6/ABS共混物的脆-韧转变研究

采用熔融共混方法制备了苯乙烯-马来酸酐共聚物(SMA)增容的PA6/ARS共混物,结合吴守恒的临界基体层厚度(IDc)理论,考察了基体层厚度与界面粘接对PA6/ABS共混物脆一韧转变的影响.结果表明,温度低于8℃,当ID减小时,冲击强度先缓慢增加,当ID＜ID.时,共混物缺口冲击强度急剧增加;测试温度处于13℃～23℃...

Brittle-Ductile Transition Temperature of PA6/ABS Blends

The toughening mechanisms in blends of polyamide 6(PA6)/ acrylonitrile-butadiene-styrene copolymer(ABS) were studied using scanning electron microscopy.The effect of interfacial adhesion on fracture behavior of PA6/ABS blends strongly depended upon temperature by testing.The relation among temperature,fracture behavior and interfacial adhesion can be understood in terms of the deformation mechanisms,i.e.in the case of poor interfacial adhesion,the toughness lies on whether debonding exist at the interface relieves triaxial tension or no.It is believed that for good interfacial adhesion,internal cavitation followed by matrix shear yielding is a predominant factor for toughening.Furthermore,the fracture surfaces of these blends were probed to elucidate how interfacial adhesion affects the impact strength of the blends.It is found that increasing temperature and decreasing interparticle distance(ID) have equivalent effects on the brittle-tough transition of toughening PA6 with ABS.