窄分布支化结构稀土顺丁橡胶的性能

doi:10.11944/j.issn.1000-0518.2016.12.160399

摘要/Abstract

摘要：

利用稀土钕催化体系合成窄相对分子质量分布的顺丁橡胶(NMWD-NdBR),研究了NMWD-NdBR的结构和性能,并与宽相对分子质量分布的稀土顺丁橡胶(WMWD-NdBR)进行对比。结果表明,相同温度转速条件下NMWD-NdBR表现更为优异的流变行为;NMWD-NdBR与WMWD-NdBR相比,焦烧时间和硫化时间基本相似,但最小转矩(M_L)降低,最大转矩(M_H)提高,表现为更好的加工行为和更佳的物理机械性能;橡胶加工分析仪测试的数据可知,同样配方和加工工艺条件下,NMWD-NdBR具有与WMWD-NdBR相似的Payne效应和更低的滞后损失(tanδ),tanδ与碳黑分散性以及滚动阻力吻合性良好。

关键词: 窄相对分子质量分布, 长链支化, 稀土顺丁橡胶, Payne效应, 滞后损失

Abstract:

The structure and properties of polybutadiene rubber(BR) with narrow molecular mass distribution synthesized by rare earth Nd catalysts(NMWD-NdBR) were studied and compared with those of the sample with a wider molecular weight distribution(WMWD-NdBR). The results show that NMWD-NdBR gets a steady rheological behavior under the same rotation rate. The scorch time and the optimum curing point of NMWD-NdBR are similar to those of WMWD-NdBR, but the minimum torque(M_L), maximum torque(M_H) and mechanical properties of NMWD-NdBR are slightly better than those of WMWD-NdBR. The data of rubber processing analyzer(RPA) show that the Payne effect of NMWD-NdBR are similar to those of WMWD-NdBR, and the hysteresis loss(tanδ) of NMWD-NdBR are superior to those of WMWD-NdBR. The results of tanδ data are in good agreement with those of carbon black dispersion, heat build-up, permanent set, as well as rolling resistance.

Key words: narrow molecular mass distribution, long chain branching, Nd-based butadiene rubber, payne effect, hysteresis loss

张浩, 于琦周, 张新惠, 刘景圣. 窄分布支化结构稀土顺丁橡胶的性能[J]. 应用化学, 2016, 33(12): 1408-1414.

ZHANG Hao, YU Qizhou, ZHANG Xinhui, LIU Jingsheng. Properties of Branched Structure Nd-base Polybutadiene Rubber with Narrow Relative Molecular Mass Distribution[J]. Chinese Journal of Applied Chemistry, 2016, 33(12): 1408-1414.

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