少量碳纳米管非等量替代炭黑对丁苯橡胶抗疲劳破坏性能的影响  

Effect of non-equivalent substitution of a small amount carbon nanotubes for carbon black on fatigue resistance of carbon black/styrene-butadiene rubber composites

作　　者：黄舟[1] 刘畅[1] 董彬[1] 吴友平[1,2] 

机构地区：[1]北京化工大学北京市新型高分子材料制备与加工重点实验室,北京100029 [2]北京化工大学有机无机复合材料国家重点实验室,北京100029

出　　处：《合成橡胶工业》2014年第1期52-56,共5页China Synthetic Rubber Industry

基　　金：国家"九七三"计划项目(2011CB932603);教育部新世纪优秀人才计划资助项目(NCET-10-0202)

摘　　要：对于炭黑／丁苯橡胶复合材料，分别用l、2和3份（质量，下同）碳纳米管替代4、8和12份炭黑，研究了复合材料在宽应变范围（30％～100％）的抗疲劳破坏性能。结果表明，在30％～70％应变下，与纯炭黑填充的胶料相比，加入碳纳米管疲劳寿命提高，裂纹增长速率降低；在70％～100％应变下，胶料的疲劳寿命降低，裂纹增长速率提高。原因是碳纳米管的加入增大了滞后损失，在小应变下滞后生热可分担部分外界能量，而在大应变下滞后生热增大，使降解加速所致。撕裂能与裂纹增长速率的关系也证明了这一点。此外还证明了采用1份碳纳米管与4份炭黑N234对丁苯橡胶抗疲劳破坏性能的贡献基本相同。In carbon black/styrene-butadiene rubber coinposites,4 ,8 ,12 phr of carbon black were replaced respectively with 1,2,3 phr of carbon nanotube, and the fatigue resistance of the composites was studied in a wide strain range（30% -100% ）. The results showed that compared with pure carbon black filled composites,the fatigue life of the carbon nanotube filled composites lasted, and the crack growth rate reduced in the strain range 30% to 70% , but they went the other way round in the strain range 70% to 100%. The above results could be attributed to the increase of hysteresis loss based on the filling carbon nanotube,in low strain range,the hysteresis heat dissipated part of external energy, and in high strain range, it increased and accelerated the degradation of composite. And this was verified by the relationship between crack growth rate and tearing energy,from which it was concluded that 1 phr of carbon nanotube and 4 phr of carbon black N 234 presented equivalent contribution to the fatigue resistance of composites.

关 键 词：丁苯橡胶 碳纳米管 疲劳破坏 撕裂能 滞后能 

分 类 号：TQ330.1[化学工程—橡胶工业]