摘要
利用多巴胺自聚、硅烷偶联剂的接枝反应以及植酸(PA)、三价铁离子(Fe^(3+))之间的络合反应对芳纶纤维(AF)表面进行化学修饰,制备改性芳纶纤维AF-Si-P、AF-Si-P-Fe,并且考察了芳纶纤维改性前后对三元乙丙橡胶(EPDM)基复合材料综合性能的影响。结果表明,与空白样和未改性AF相比,两种改性AF的表面粗糙度提高,高温成炭能力增强,两种改性AF填充EPDM混炼胶的加工安全性、硫化程度均提高,硬度和撕裂强度提高。与空白样相比,AF的引入有利于降低峰值热释放速率,延长引燃时间,增加残余质量,而AF经过改性后,阻燃效果进一步提升,其中AF-Si-P-Fe表现出对EPDM硫化胶优异的抑烟效果。
The surface of aramid fibre(AF)was chemically modified using self-polymerization of dopamine,graft reaction of silane coupling agent,and complexation reaction between phytic acid(PA)and trivalent iron ions(Fe 3+),in order to prepare modified aramid fibre AF-Si-P and AF-Si-P-Fe.The effect of aramid fibre modification on the comprehensive performance of ethylene-propylene-diene monomer(EPDM)composites was investigated.The results showed that compared with the control sample and unmodified AF,the surface roughness of the two modified AFs was increased,the char formation ability at the high temperature range was enhanced,and the processing safety and curing extent of the two modified AF-filled EPDM blends were improved.Compared to control sample and unmodified AF-filled EPDM vulcanizate,the hardness and tear strength of modified AFs-filled EPDMs increased.Compared with the control sample,the introduction of AF was beneficial to reduce the peak of heat release rate,prolong the ignition time and increase the residual mass,and the effect of modified AF on the flame retardant properties of EPDM vulcanizates was further improved.What’s more,AF-Si-P-Fe showed excellent smoke suppression effect on EPDM vulcanizate.
作者
鹿寒冰
晏欢
周苏
苏路遥
许兰威
王鹤
LU Hanbing;YAN Huan;ZHOU Su;SU Luyao;XU Lanwei;WANG He(College of Polymer Science and Engineering/Key Laboratory of Rubber and Plastic Materials and Engineering,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China;Zhongce Rubber(Tianjin)Co.,Ltd.,Tianjin 300452,China)
出处
《弹性体》
CAS
2024年第4期63-69,共7页
China Elastomerics
