氟醚橡胶的耐热性能研究

研究200 ℃下老化时间对氟醚橡胶耐热老化性能与结构的影响。结果表明：氟醚橡胶老化22 d后仍保持优异的物理性能；氟醚橡胶的玻璃化温度、-50 ℃以上的储能模量不随老化时间的变化而变化，而损耗因子峰值随老化时间的延长呈小幅增大趋势；氟醚橡胶适合用于-50 ℃以上环境下使用的密封材料。;The influence of aging time at 200 ℃ on the heat aging resistance and structure of fluoroether rubber was investigated.The results showed that，fluoroether rubber kept good physical properties after aging for 22 days.As the aging time prolonged， the glass transition temperature and storage modulus of fluoroether rubber at the temperature above -50 ℃ were not changed，but loss factor increased slightly.Fluoroether rubber was suitable for sealing material used at the temperature above -50 ℃