摘要
研究了丁二烯结构单元的含量(0~24.3%(mol))对反式丁戊橡胶(TBIR)性能的影响。结果表明,随丁二烯结构单元含量的提高,TBIR大分子链的热稳定性改善;硫化过程焦烧时间和工艺正硫化时间略有延长,硫化速率降低,交联密度略提高;硫化胶结晶性能大幅度削弱直至消失。强结晶性赋予丁二烯含量为0%(mol)和8.5%(mol)的TBIR硫化胶呈现强而韧的拉伸行为,其拉伸强度和定伸应力较高,拉断伸长率较低;丁二烯含量为16.3%(mol)和24.3%(mol)的TBIR硫化胶呈现典型的硫化橡胶的拉伸行为,其拉伸强度和定伸应力较低,拉断伸长率较高。同时随丁二烯结构单元含量的提高,TBIR硫化胶的滚动阻力和压缩生热降低,耐湿滑性能、耐磨耗性能、回弹性能和耐老化性能改善。丁二烯结构单元含量的适量提高可显著改善反式丁戊橡胶的"魔鬼三角"性能。
The influence of the contents of butadiene repeating units(0~24.3%(mol))on the properties of trans-1,4-Poly(butadiene-co-isoprene)copolymer rubber(TBIR)were invested.The results showed that,the thermo stability of TBIR molecular chain improved with the increase of the contents of butadiene repeating units.The scorch time and optimum curing time were slightly delayed,the crosslinking density increased slightly.The crystallinity of TBIR vulcanizates was greatly weakened until it disappeared.TBIR vulcanizates with 0%(mol)and 8.5%(mol)butadiene repeating units showed strong and tough tensile deformation behavior,the higher tensile strength and modulus,the lower elongation at break.TBIR vulcanizates with 16.3%(mol)and 24.3%(mol)butadiene repeating units showed tensile deformation behavior of typical vulcanized rubber,the lower tensile strength and modulus,the higher elongation at break.The rolling resistance and heat built-up of TBIR vulcanizates decreased obviously,the wet-skid resistance,abrasion resistance,rebounce and ageing resistance improved significantly with the increase of the contents of butadiene repeating units.TBIR with higher contents of butadiene repeating units have better devil triangle properties for high performances tyre.
作者
王浩
李兰阁
王日国
李太衬
葛怀涛
任学斌
栾波
WANG Hao;LI Lan-ge;WANG Ri-guo;LI Tai-chen;GE Huai-tao;REN Xue-bin;LUAN Bo(Shandong Huaju Polymer Materials Co.,Ltd.,Binzhou 256500,China)
出处
《高分子通报》
CAS
CSCD
北大核心
2020年第8期33-40,共8页
Polymer Bulletin
基金
2019年博兴县产业集群科技重大专项。
关键词
反式丁戊橡胶
高性能轮胎
胎面胶
魔鬼三角
耐湿滑性能
滚动阻力
Trans-1,4-poly(butadiene-co-isoprene)copolymer rubber
High performances tyre
Tread stock
Devil triangle
Wet-skid resistance
Rolling resistance
