摘要
考察集成橡胶(SIBR)的臭氧老化过程,并对老化过程中其微观结构及试样表面臭氧龟裂的变化规律进行研究。结果表明:SIBR分子链中双键含量在臭氧老化过程中减小,并伴有羰基结构的产生,其双键和羰基结构的变化趋势与溶聚丁苯橡胶(SSBR)相似,老化后期均趋于平缓。未填充和炭黑填充SIBR产生臭氧龟裂的初裂时间均居于SSBR和异戊橡胶(IR)之间,表面裂纹增长速度均较慢。与SSBR和IR相比,经臭氧老化后,SIBR物理性能变化率均较小,耐臭氧老化性能较优。
The ozone aging process of SIBR was studied,and the changes of its microstructure and surface cracking during the ozone aging were investigated. The results showed that, the content of double bonds in the molecular chain of SIBR decreased and carbonyl group formed during aging. Those changes slowed down in the late stage of aging which was similar to SSBR. The initial cracking times of unfilled and carbon black filled SIBRs were between SSBR and IR, respectively, and their crack growth rate was slower than that of SSBR and IR. Compared with SSBR and IR, the physical property retention of SIBR after ozone aging was higher,indicating better ozone aging resistance.
出处
《橡胶工业》
CAS
2015年第8期458-463,共6页
China Rubber Industry
基金
国家自然科学基金资助项目(51273099)
