成分因素对PC/ABS合金暴露在烷基苯中力学性能的影响研究

Effect of Composition Factors on Mechanical Properties of PC/ABS Alloy Exposed to Alkylbenzene

通过万能拉伸试验机检测聚碳酸酯/丙烯腈⁃丁二烯⁃苯乙烯共聚物(PC/ABS)合金置于烷基苯后拉伸应变和拉伸强度的变化,研究了烷基苯对其力学性能的影响规律。结果表明,经过60℃烷基苯浸渍处理30 d后,分别添加了马来酸酐接枝低密度聚乙烯(PE⁃g⁃MAH)、马来酸酐接枝ABS(ABS⁃g⁃MAH)、甲基丙烯酸缩水甘油酯接枝乙烯⁃1⁃辛烯共聚物(POE⁃g⁃GMA)的PC/ABS的断裂拉伸应变变化率下降了58.8%、25.4%和41.3%;相比于ABS,PC组分是导致断裂拉伸应变下降的一个关键因素;有效的相容剂能延长PC/ABS合金在类烷基苯溶剂中保持力学性能稳定性的时间;阻燃剂分散在PC/ABS体系中,在烷基苯渗透作用下更容易发生韧⁃脆行为转变。

The tensile strain and tensile strength of PC/ABS alloy was tested after exposed to alkylbenzene using a univer⁃sal tensile testing machine.The influence of alkylbenzene on mechanical properties of PC/ABS alloy was investigated.The results indicated that after 30 days of alkylbenzene impregnation at 60℃,PC/ABS alloys containing PE⁃G⁃MAH,ABS⁃G⁃MAH and POE⁃g⁃GMA showed a decrease in the rate of tensile strain at fracture by 58.8%,25.4%,and 41.3%,respectively.Compared to ABS,PC component is a key factor for the decrease of tensile strain at fracture.The effective compatibilizer can prolong the time for the PC/ABS alloy to maintain its mechanical property stability in al⁃kylbenzene solvent.When the flame retardant was dispersed in PC/ABS matrix,a ductile⁃brittle transformation behavior is more likely to occur due to the osmosis effect of alkylbenzene.