端羧基超分散剂对剑麻纤维/聚丙烯性能的影响  

Effect of End-Carboxyl Hyperdispersant on Property of SF/PP

作　　者：罗崇禧[1] 陆绍荣[1] 刘括[1] 郭栋[1] 樊新[1] 李善荣[1] 

机构地区：[1]桂林理工大学有色金属及材料加工新技术教育部重点实验室,广西桂林541004

出　　处：《现代塑料加工应用》2012年第2期35-38,共4页Modern Plastics Processing and Applications

基　　金：国家自然科学基金项目(51163004);广西科技攻关项目(0992022-4);广西自科基金项目(0991003Z;0842003-4A)

摘　　要：采用自制端羧基超分散剂(ECH)改性剑麻纤维(SF)/聚丙烯(PP)复合材料,探讨了ECH的使用对SF/PP复合材料的力学性能、热力学性能和结晶性能的影响,并采用扫描电镜(SEM)观察复合材料的冲击断面形貌。结果表明,经ECH改性后的SF/PP复合材料的冲击强度、弯曲强度分别比未改性的复合材料提高了67.3%和21.0%,复合材料的热稳定性、PP相的结晶速率和结晶度有所提高,但晶态结构仍是典型的α晶型,ECH的加入使得复合材料的储能模量提高,损耗因子降低。End-carboxyl hyperdispersant （ECH） was synthesized and used to modified sisal fiber（SF）/polypropylene （PP） composites. The effects of ECH on mechanical properties, thermal properties, crystallization of SF/PP composites were discussed, and the impact fracture surface of SF/PP composites was observed with scanning electron microscopy （SEM）. The results show that the impact strength and flexural strength of the SF/PP composites modified with ECH are higher than those of unmodified system, which increases by 67.3% and 21.0%, respectively. And the thermal stability of the composites, crystallization rate and degree of crystallinity of PP increase. The crystalline structures of PP are still typical a crystal form. With addition of ECH, the storage modulus of the SF/PP composites increases, but the loss factor is decreased.

关 键 词：聚丙烯 剑麻纤维 端羧基超分散剂 复合材料 力学性能 势力学性能 结晶性能 

分 类 号：TQ327[化学工程—合成树脂塑料工业]