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（ML）降低，最大转矩（MH）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。
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 ( ML ), maximum torque ( MH ) 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 tanδdata are in good agreement with those of carbon black dispersion , heat build-up, permanent set , as well as rolling resistance .
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