Abstract

This paper details a new method for improving the interfacial bonding between PA66 short fiber (PSF) and natural rubber (NR) by reaction of the methacrylic acid (MAA)-grafting-modified PSF with rubber during vulcanization. Carbon-carbon double bonds introduced to the SF surface by MAA grafting were opened, and a vulcanization reaction occurred between the modified PSF and rubber in the presence of sulfur. The chemical reactions were verified by FTIR and XPS. The processing rheological behaviors of the compounded composites were investigated by a rubber processing analyzer (RPA). The morphology of modified PSF was characterized by AFM and SEM. The improved interfacial bonding was confirmed by DMA, which enhanced deformational stress at definite elongation of the NR/PSF composites. The volume concentration of the MAA solution for grafting on the SF surface had a great influence on the interfacial bonding and mechanical properties of the composites; when the volume concentration was 30 %, the modified PSF-reinforced NR/CB had the best interfacial bonding and mechanical properties.

中文翻译：

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原位硫化反应增强聚酰胺66短纤维/天然橡胶复合材料的性能

摘要

本文详细介绍了一种新方法，该方法可通过甲基丙烯酸（MAA）接枝改性的PSF与橡胶在硫化过程中的反应来改善PA66短纤维（PSF）与天然橡胶（NR）之间的界面粘结。打开通过MAA接枝引入到SF表面的碳-碳双键，在硫的存在下，改性PSF和橡胶之间发生硫化反应。化学反应通过FTIR和XPS验证。通过橡胶加工分析仪（RPA）研究了复合复合材料的加工流变行为。用AFM和SEM对改性后的PSF的形貌进行了表征。DMA证实了界面结合的改善，这在NR / PSF复合材料的确定伸长率下增加了变形应力。SF表面接枝的MAA溶液的体积浓度对复合材料的界面键合和力学性能有很大影响。当体积浓度为30％时，改性PSF增强的NR / CB具有最佳的界面结合和机械性能。