再生橡胶高性能化策略及其结构与性能研究

The Structures and Properties of Reclaimed Rubber Modified with High Performance Strategy

研究了再生橡胶(RR)的高性能化策略及反式-1, 4-丁二烯-异戊二烯共聚橡胶(TBIR)/RR并用胶的结构与性能。结果表明,实验用再生橡胶由100份橡胶和58份填料组成;采用100份TBIR与58份炭黑共混制备TBIR母炼胶,90～60份RR与10～40份TBIR母炼胶按比例共混,相比RR硫化胶,RR/TBIR并用硫化胶具有非常优异的综合性能:拉伸强度提高33%～83%,100%定伸应力提高31%～75%,撕裂强度提高39%～76%,邵A硬度提高3%～11%,弹性提高30%～65%,耐磨耗性能提高11%～25%,100%伸张疲劳寿命提高0.5～2.1倍,耐屈挠疲劳裂纹引发性能提高1.0～7.3倍,耐热空气老化性能提高11%～59%,耐臭氧老化性能提高5%～27%,滚动阻力降低20%～42%。通过RR与TBIR简单的物理共混,可实现RR更完善的橡胶网络结构及优异的物理机械性能,为廉价橡胶材料的再生利用提供高性能化方案与策略,赋予再生橡胶更广泛的用途。

The structures and.properties of reclaimed rubber (RR)modified with multi-block trans-1,4-poly (butadiene-co-isoprene)copolymer rubber (TBIR)were research'ed.The results showed that,the reclaimed rubber used in this experiment was consisted of 100phr-rubber and 58 phr filler.100phr TBIR and 58phr carbon black (CB)were mixed for the TBIR master-batch preparation.90-60 phr RR and 10-40 phr TBIR master-batch were mixed to prepare the RR/ TBIR compounds.Compared with RR vulcanizates,RR/TBIR vulcanizates showed excellent performances,such as improved tensile strength (33% to 83% higher),modulus at 100%(31% to 75%higher),tear strength (39% to 76% higher),shore A hardness (3% to 11% higher,),rebound (30%to 65% higher),abrasion resistance (11% to 25% higher),tensile fatigue resistance (0.5 to 2.1 times),flex fatigue crack initiation resistance (1.0 to 7.3 times),hot-air ageing resistance (11% to 59% higher)and ozone ageing resistance (5% to 27% higher),and decreased rolling resistance (20% to 42% lower).The improved polymer networks,filler-polymer interaction and filler distribution of RR was obtained through the simple blending of RR and TBIR.A high performance modification strategy for RR with TBIR is proposed.