氢氧化铝/无机填料协同阻燃乙丙橡胶的性能研究  

Study on properties of aluminum hydroxide/inorganic filler synergistic flame retardant ethylene propylene rubber

作　　者：石志强 徐香 杨斌 夏茹 钱家盛 柯玉超 SHI Zhiqiang;XU Xiang;YANG Bin;XIA Ru;QIAN Jiasheng;KE Yuchao(College of Chemistry&.Chemical Engineering,Key Laboratory of Environment Friendly Polymeric Materials of Anhui Province,Anhui University,Hefei 230601,China;Anhui Provincial Key Laboratory of High-Performance Rubber and Products,Anhui Zhongding Sealing Parts Co.,Ltd.,Ningguo 242399,China)

机构地区：[1]安徽大学化学化工学院,绿色高分子材料安徽省重点实验室,安徽合肥230601 [2]安徽宁国中鼎密封件有限公司,高性能橡胶材料及制品安徽省重点实验室,安徽宁国242399

出　　处：《安徽大学学报（自然科学版）》2024年第2期76-81,共6页Journal of Anhui University(Natural Science Edition)

基　　金：安徽省教育厅高等学校自然科学研究重点项目(KJ2020A0023,KJ2021A0034);国家级大学生创新创业训练计划项目(202210357034)。

摘　　要：笔者在三元乙丙橡胶(EPDM)基体中通过熔融共混法添加氢氧化铝/膨胀石墨(ATH/EG)、氢氧化铝/有机蒙脱土(ATH/OMMT)、氢氧化铝/硼酸锌(ATH/ZB)3种复合阻燃剂,制得三元乙丙橡胶/氢氧化铝/膨胀石墨(EPDM/ATH/EG)、三元乙丙橡胶/氢氧化铝/有机蒙脱土(EPDM/ATH/OMMT)、三元乙丙橡胶/氢氧化铝/硼酸锌(EPDM/ATH/ZB)3种复合橡胶.采用热重分析、极限氧指数和锥形量热等手段,研究了3种无机阻燃剂EG、OMMT及ZB与ATH对EPDM的协同阻燃效果.结果表明,3种协同阻燃剂都能增加复合橡胶的初始分解温度,增加残炭量,降低燃烧峰值,提高极限氧指数.说明3种无机阻燃剂都对EPDM/ATH具有一定的阻燃效果.其中,EPDM/ATH/EG复合橡胶的初始分解温度(443.7℃)和残炭量(40.3%)最高,EPDM/ATH/OMMT复合橡胶的总热释放量(62.3MJ·m^(-2))和燃烧峰值(232.9kW·m^(-2))最低,极限氧指数(34.5%)最高.综合比较发现,OMMT协同ATH阻燃EPDM最为理想.This paper mainly dealt with the addition of three types of inorganic flame retardants,aluminum hydroxide/expanded graphite(ATH/EG),aluminum hydroxide/organic montmorillonite(ATH/OMMT)and aluminum hydroxide/zinc borate(ATH/ZB)by the melt blending,and the preparation of EPDM/ATH/EG,EPDM/ATH/OMMT and EPDM/ATH/ZB composite rubbers.Synergistic flame retardant effects of various inorganic flame retardants expanded graphite(EG),organic montmorillonite(OMMT)and zinc borate(ZB)with aluminum hydroxide(ATH)were investigated by means of thermogravimetric analysis,ultimate oxygen index and cone calorimetry.The results showed that the three synergistic flame retardants increased the initial decomposition temperatures of the composite rubber,increased the amount of residual carbon,reduced the burning peak and improved the limited oxygen index(LOI).The experimental data indicated that the three flame retardants had certain flame retardant effect on the matrix.Among them,EPDM/ATH/EG composite rubber had the highest initial decomposition temperature(443.7℃)and the highest residual carbon amount(40.3%).EPDM/ATH/OMMT composite rubber had the lowest total heat release(62.3 MJ·m^(-2)),the lowest combustion peak(232.9 kW·m^(-2))as well as the highest limited oxygen index(34.5%).Comparison of all experimental data suggested the EPDM/ATH/OMMT composite rubber was the most desirable.

关 键 词：三元乙丙橡胶 氢氧化铝 膨胀石墨 有机蒙脱土 硼酸锌 阻燃 

分 类 号：TQ333.4[化学工程—橡胶工业]