YANG Yongqing, WANG Feng, WANG Lianbiao
(College of Chemistry and Chemical Engineering, Ningxia University, Yinchuan 710021, China)
Abstract:EPDM modified by PTFE and nanometers SiO2 were prepared by vulcanization after mixing. The morphology tests such as scanning electron microscopy, infrared spectroscopy and differential scanning calorimetry show that PTFE and EPDM have good compatibility when PTFE content is 5 phr, the tensile strength, the elongation at break, the hardness and the tear strength of the composites are 22.42 MPa, 588.91%, 82.0° and 49.60 kN/m, respectively. Thermogravimetric analysis and the aging experiments show that the aging resistance and heat resistance of PTFE modified composites are improved. After adding 5 phr nanometers of SiO2, the mechanical properties of EPDM are also greatly improved.
Keywords: ethylene propylene rubber; polytetrafluoroethylene; mechanical property; nanometers SiO2; thermal properties
中图分类号：TU535 文献标志码：A
收稿日期： 2019-04-04， 修回日期：2019-05-19，在线出版时间：2019-06-21 11:37。
基金项目：宁夏高等学校研究基金项目，编号：NGY2017040；宁夏大学大学生创新创业基金项目，编号：Q2018107490082。
第一作者简介：杨永清(1978—)，女，博士，副教授，研究方向为功能性复合材料。E-mail：yqyang@nxu.edu.cn。
文章编号：1008-5548(2019)05-0023-06
doi:10.13732/j.issn.1008-5548.2019.05.004
