Zhao Dong, Liu Wei, Shen Yucai, Jiang Guodong, Wang Tingwei
College of Material Science and Engineering, Nanjing Tech University, Nanjing 211816, China.
Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing 211816, China.
Polymers (Basel). 2020 Jul 9;12(7):1523. doi: 10.3390/polym12071523.
Ceramifiable ethylene propylene diene monomer (EPDM) composites with fiber network structures were prepared by using aramid fiber (AF), ammonium polyphosphate (APP), and silicate glass frits (SGF). The effect of AF on the curing characteristic of the ceramifiable EPDM composites was studied. The morphology of AF in the composites system was observed by optical microscopy (OM) and scanning electron microscope (SEM). The effects of the observed AF network structures on the solvent resistance, mechanical properties, ablative resistance, self-supporting property, and ceramifiable properties of the composites were investigated. Results suggested that the existence of the AF network structure improved the vulcanization properties, solvent resistance, thermal stability, and ablative resistance of the EPDM composites. An excellent self-supporting property of the EPDM composites was obtained by combining the formation of the AF network and the formation of crystalline phases at higher temperature (above 600 °C). The thermal shrinkage performance of AF and the increased thermal stability of the EPDM composites improved the ceramifiable properties of the EPDM composites.
采用芳纶纤维（AF）、聚磷酸铵（APP）和硅酸盐玻璃粉（SGF）制备了具有纤维网络结构的可陶瓷化三元乙丙二烯单体（EPDM）复合材料。研究了AF对可陶瓷化EPDM复合材料固化特性的影响。通过光学显微镜（OM）和扫描电子显微镜（SEM）观察了复合材料体系中AF的形态。研究了观察到的AF网络结构对复合材料的耐溶剂性、力学性能、耐烧蚀性、自支撑性能和可陶瓷化性能的影响。结果表明，AF网络结构的存在改善了EPDM复合材料的硫化性能、耐溶剂性、热稳定性和耐烧蚀性。通过在较高温度（600℃以上）下结合AF网络的形成和结晶相的形成，获得了EPDM复合材料优异的自支撑性能。AF的热收缩性能和EPDM复合材料热稳定性的提高改善了EPDM复合材料的可陶瓷化性能。
