合成杜仲胶与天然杜仲胶的改性及性能研究  

Modification and performance of natural and synthetic gutta-percha

作　　者：任庆海[1] 童晓梅[1] 李欢乐[1] 马红红[1] 

机构地区：[1]陕西科技大学化学与化工学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2014年第5期73-77,共5页Journal of Shaanxi University of Science & Technology

基　　金：陕西省大学生创新创业训练计划项目(20131069);陕西科技大学博士科研启动基金项目(BJ12-06)

摘　　要：采用高密度聚乙烯(HDPE)分别对合成杜仲胶、天然杜仲胶进行共混改性,并研究了制备工艺对力学性能和形状记忆性能的影响.结果表明,合成杜仲胶、天然杜仲胶体系中的硫、高密度聚乙烯、白炭黑、KH-560等的最佳质量分数分别为1、15、20(40)、2;最佳硫化温度为165℃、155℃;最佳硫化时间为15min、20min.合成杜仲胶、天然杜仲胶混炼胶的软化点分别为56℃、53℃,热回复率高且回复极快,冷回复率几乎为0;体系中加入KH-560后,材料的记忆性能和力学性能增强;天然杜仲胶的熔点、硬度都比合成杜仲胶小,其制品颜色较合成杜仲胶深,其它物理机械性能与合成杜仲胶相差不大.Gutta-percha/HDPE was prepared by blend method.The influence of process on mechanics performance and shape memory performance were studied in the paper.The results showed that the formula（S 1phr,HDPE 15 phr,Silica 20、40phr,KH-560 2phr）is the best for synthetic and natural gutta-percha.The best vulcanized temperature and the time are 165℃,15 min,and 155℃,20 min.The softening point of vulcanized gutta-percha is about 56℃and 53℃.The thermal recovery ratio is high and the cold recovery ratio is about 0.The mechanics performance and shape memory performance of products strengthen when added KH-560.Melting point and hardness of the blends of natural gutta-percha are smaller than synthetic.The color is darker than the synthetic gutta-percha.Other physical and mechanical properties of gutta-percha blends are not significant.

关 键 词：杜仲胶 HDPE KH-560 形状记忆材料 

分 类 号：TQ321[化学工程—合成树脂塑料工业]