聚四氟乙烯微粉/硅橡胶共混物耐高温橄榄油性能的研究  

Study on High Temperature-Olive Oil Resistance of PTFE/Silicone Rubber Blends

作　　者：李志才[1] 郭建华[1] 许传臻 

机构地区：[1]华南理工大学材料科学与工程学院,广州510640 [2]惠州源东国际硅胶制品有限公司,广东惠州516005

出　　处：《特种橡胶制品》2015年第1期1-5,18,共6页Special Purpose Rubber Products

基　　金：国家自然科学基金项目(51103048);中央高校基本科研业务费资助项目(2004ZZ0007)

摘　　要：采用机械共混法制备了聚四氟乙烯微粉(PTFE)/甲基乙烯基硅橡胶共混物,并研究了PTFE微粉用量对共混物力学性能和耐高温橄榄油性能的影响,通过ATR-FTIR、TGA和SEM分析技术对共混物进行了表征。结果表明,随着PTFE微粉用量的增加,共混物力学性能有所下降,耐油质量变化率和VOC排放值均减小,耐油性能提高。高温橄榄油浸泡前后,共混物化学结构基本不变。PTFE/硅橡胶共混物的耐热稳定性比纯硅橡胶好。随着PTFE用量的增加,共混物拉伸断面粗糙度增大,填料颗粒和基体界面清晰,经高温橄榄油浸泡后硫化胶拉伸断面略显平整,填料颗粒和基体界面变得模糊。Polytetra fluoroethylene（PTFE）powders/methylvinyl silicone rubber blends were prepared by using the mechanical blending technology,and effects of the content of PTFE powders on mechanical properties and high temperature-olive oil resistance of the blends were investigated.The blends were characterized by using ATR-FTIR,TGA and SEM analysis.The results showed that the mechanical properties of the blends decreased with the increase of PTFE powder content,and both mass change rate in oil and VOC values of the blends decreased,oil resistance increased.After the immersion in hot olive oil,chemical structure of the blends basically remained unchanged.The thermal stability of PTFE powders/silicone rubber blends was better than that of silicone rubber.The roughness of tensile fracture surface increased with the increase of PTFE powders content,and the interface between PTFE particles and rubber matrix became clear.After immersion in hot olive oil,the tensile fracture surface became flatter and the interface between the fillers particles and matrix became blurred.

关 键 词：甲基乙烯基硅橡胶 聚四氟乙烯微粉 橄榄油 耐油性能 

分 类 号：TQ333.93[化学工程—橡胶工业]