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首页> 外文期刊>Journal of Applied Polymer Science >Thermoplastic elastomeric blend of nitrile rubber and poly(styrene-co-acrylonitrile). II. Replacement of nitrile rubber by its vulcanizate powder
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Thermoplastic elastomeric blend of nitrile rubber and poly(styrene-co-acrylonitrile). II. Replacement of nitrile rubber by its vulcanizate powder

机译：丁腈橡胶和聚（苯乙烯-丙烯腈）的热塑性弹性体混合物。二。用硫化橡胶粉末代替丁腈橡胶

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摘要

A model waste nitrile rubber powder (w-NBR) was prepared by ambient grinding of aged NBR vulcanizate based on an oil seal formulation. The w-NBR was characterized by scanning electron microscopic and optical microscopic techniques. Virgin nitrile rubber in a thermoplastic elastomeric 70:30 nitrile rubber/poly(styrene-coacrylonitrile) (SAN) blend was replaced by w-NBR, and the mechanical properties and swelling index were determined. The virgin NBR in the blend was replaced by the rubber present in w-NBR (r-w-NBR) and the optimum mechanical properties were achieved at 45% replacement where the blend was still reprocessable. Transmission electron microscopic and atomic force microscopic studies reveal that w-NBR particles coated with NBR are dispersed in a continuous SAN matrix. It was observed that migration of unreacted curatives from w-NBR to virgin NBR is not significant and incorporation of curatives is necessary for attainment of optimum level of mechanical properties. (C) 2003 Wiley Periodicals, Inc. [References: 35]
机译：通过对老化的NBR硫化橡胶根据油封配方进行环境研磨，制备了模型废丁腈橡胶粉（w-NBR）。 w-NBR用扫描电子显微镜和光学显微镜技术表征。用w-NBR代替热塑性弹性体70:30丁腈橡胶/聚（苯乙烯-丙烯腈）（SAN）混合物中的纯丁腈橡胶，并测定机械性能和溶胀指数。共混物中的原始NBR被w-NBR（r-w-NBR）中存在的橡胶代替，在共混物仍可再加工的情况下，以45％的替代率实现了最佳机械性能。透射电子显微镜和原子力显微镜研究表明，涂有NBR的w-NBR颗粒分散在连续的SAN基质中。观察到未反应的固化剂从w-NBR迁移到纯净的NBR并不重要，为了达到最佳的机械性能，必须掺入固化剂。 （C）2003 Wiley Periodicals，Inc. [参考：35]

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