摘要
采用加速老化实验方法对特种氟橡胶密封材料的热氧老化性能进行了研究,获得了不同老化温度及老化时间对特种氟橡胶力学性能和交联结构的影响规律。研究结果表明,氟橡胶在热空气中老化时随老化温度的升高和老化时间的延长,材料的拉伸强度、硬度降低,100%定伸应力先增加后减小,拉断伸长率先减小后增大,回弹性和压缩永久变形增大。材料的交联密度先增加后减少,表明氟橡胶在热氧老化初期以交联为主,在老化后期以降解为主。
Fluoroelastomer can be used as a sealing material for different purposes.The aim of this work is the evaluation of the thermal-oxidative aging properties of fluoroelastomer by using accelerated aging test,then the relations between different aging temperatures and aging time and mechanical properties and crosslink structure of fluoroelastomer were obtained.The results showed that in the air-oven with extended aging time and aging temperature,the tensile strength and hardness decreased,and the tensile stress...
出处
《弹性体》
CAS
北大核心
2010年第4期25-30,共6页
China Elastomerics
基金
国防军工环境试验与观测重点项目
关键词
氟橡胶
热氧老化
交联结构
力学性能
fluoroelastomer
thermal-oxidative aging test
crosslink structure
mechanical properties
