弹性体/刚性粒子协同增韧PVC研究

研究了不同组成的聚氯乙烯(PVC)树脂/耐热改性剂/(甲基丙烯酸甲酯/丁二烯/苯乙烯)共聚物(MBS)复合体系的力学性能和耐热性能,用扫描电子显微镜分析共混材料的冲击断面微观形态,用动态热机械分析仪测定其动态热力学性能.结果表明,在PVC中添加8份MBS、10份耐热改性剂时共混材料的力学性能和耐热性能达到一个均衡值,冲击断面出现了明显的"须根"现象,PVC材料由脆性断裂转变为韧性断裂,二者协同作用既提高了共混材料的韧性,又改善了其耐热性能.

RESEARCH OF PVC COOPERATIVE TOUGHENING BY ELASTOMER/RIGID PATICLES

The mechanical property and heat resistance of PVC/heat resistance modifier/MBS comples system were studied. The microgeometry of impact fault surface was analysed by SEM, and the dynamic mechanical property was analysed by dynamic mechanical analhyzer(DMA). Results showed that the mechanical property and heat resistance of the PVC including MBS8 pvw and heat resistance modifier 10 pbw achieved a balanced value, the root fivril phenomenon was appeared on impact fault surface obviously, the brittle rupture o...