粉状填充剂对橡胶复合材料拉断伸长率的影响  

Effects of powdered fillers on elongation at break of rubber composites

作　　者：张琦[1] 吴友平[2] 刘力[2] 田明[1] 张立群[1] 

机构地区：[1]北京化工大学教育部纳米材料重点实验室,北京100029 [2]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029

出　　处：《橡胶工业》2005年第9期517-522,共6页China Rubber Industry

基　　金：教育部博士点基金资助项目(20020010004);出国留学人员回国启动基金资助项目(ZLX2003-06)

摘　　要：以不同粒径的氢氧化镁、轻质碳酸钙和炭黑N110填充SBR、EPDM、NBR和硅橡胶,探讨粉状填充剂(简称粉体)对其填充橡胶复合材料拉断伸长率的影响。结果表明,粉体的表面活性、粒径、分散性、用量以及基体橡胶的拉伸强度和拉断伸长率等因素对橡胶复合材料拉断伸长率的影响存在着竞争关系。粉体的粒径和基体橡胶的交联密度影响橡胶复合材料拉断伸长率随粉体用量增大而提高的幅度。粉体对基体橡胶表现出较强的补强作用时,使橡胶复合材料的拉断伸长率出现峰值的粉体用量较小。与传统观点不同,试验得出大多数情况下填充粉体有利于橡胶复合材料拉断伸长率提高的结论。The effects of the powdered fillers on the elongation at break of the rubber composites were investigated using SBR, EPDM, NBR and silicone rubber compounds filled with different levels of magnesium hydroxide,which had different particle sizes, light calcium carbonate and black Nl10 respectively. The results showed that there was a competitive relationship among the effects of the sur- face activity, particle size, dispersity and addition level of powdered fillers, as well as the tensile strength and elongation at break of rubber matrix on the elongation at break of rubber composites. The increase of the elongation at break of rubber composites with the addition level of powdered fillers was influenced by the particle size of powdered fillers and the cross-linking density of rubber matrix. If the powdered fillers gave the rubber matrix the stronger reinforcing effect, the addition level of powdered fillers with which the peak elongation at break of rubber composites occured was lower. In contrast with the traditional viewpoint ,it was concluded from the test that the powdered fillers were beneficial to increase the elongation at break of rubber composites.

关 键 词：粉状填充剂 SBR EPDM NBR 硅橡胶 拉断伸长率 

分 类 号：TQ330.1[化学工程—橡胶工业]