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首页> 外文期刊>Journal of Applied Polymer Science >Effect of the compatibility on the morphology and properties of acrylonitrile-butadiene rubber/polypropylene thermoplastic vulcanizates
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Effect of the compatibility on the morphology and properties of acrylonitrile-butadiene rubber/polypropylene thermoplastic vulcanizates

机译：相容性对丙烯腈-丁二烯橡胶/聚丙烯热塑性硫化橡胶的形态和性能的影响

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摘要

In this study, the morphologies of three types of acrylonitrile-butadiene rubber (NBR)/polypropylene (PP) thermoplastic vulcanizates (TPVs) (with an NBR/PP blend ratio of 70/30) were compared. The TPVs were (1) an ultrafine fully vulcanized acrylonitrile-butadiene rubber (UFNBR)/PP TPV made by the mechanical blending of UFNBR with PP, (2) a dynamically vulcanized NBR/PP TPV without the compatibilization of maleic anhydride grafted polypropylene (MP) and amine-terminated butadiene-acrylonitrile copolymer (ATBN), and (3) a dynamically vulcanized NBR/PP TPVs with the compatibilization of MP and ATBN. The influence of the compatibility therein on the size of the dispersed vulcanized NBR particles and the crystallization behavior of the PP in the TPVs and the resultant properties are also discussed. As indicated by Fourier transform infrared spectroscopy, scanning electron microscopy, differential scanning calorimetry, polarizing microscopy, dynamic mechanical thermal analysis, and rheological and mechanical testing, the compatibility was significantly improved by the reactive compatibilization of MP and ATBN, which led to a uniform and fine morphology. The compatibilization increased the crystallization rate and reduced the size of the spherulites of PP. On the other hand, it was found that the dispersed vulcanized NBR particles lowered the degree of crystallinity. The better the compatibility of the blend was, the lower the degree of crystallinity and the storage modulus were, but the higher the loss factor and the processing viscosity were. All TPVs showed almost the same oil resistance, but the TPV prepared with reactive compatibilization had the best mechanical properties.
机译：在这项研究中，比较了三种类型的丙烯腈-丁二烯橡胶（NBR）/聚丙烯（PP）热塑性硫化橡胶（TPVs）（NBR / PP混合比为70/30）的形貌。 TPV是（1）通过UFNBR与PP的机械共混制成的超细的全硫化丙烯腈-丁二烯橡胶（UFNBR）/ PP TPV，（2）动态硫化的NBR / PP TPV，而没有马来酸酐接枝聚丙烯（MP）的相容性）和胺端基的丁二烯-丙烯腈共聚物（ATBN），以及（3）具有MP和ATBN相容性的动态硫化NBR / PP TPV。还讨论了其中的相容性对分散的硫化NBR颗粒尺寸和PP在TPV中的结晶行为及所得性能的影响。如傅里叶变换红外光谱，扫描电子显微镜，差示扫描量热法，偏光显微镜，动态机械热分析以及流变和力学测试所表明的，MP和ATBN的反应相容性显着提高了相容性，从而实现了均匀和优良的形态。相容性增加了PP的结晶速率并减小了球晶的尺寸。另一方面，发现分散的硫化NBR颗粒降低了结晶度。共混物的相容性越好，结晶度和储能模量越低，但是损耗因子和加工粘度越高。所有TPV均显示出几乎相同的耐油性，但通过反应性相容性制备的TPV具有最佳的机械性能。

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