EPDM接枝改性对其热防护材料性能的作用研究  

Effects of EPDM graft modification on the performances of thermal protection material

作　　者：王连庆 丁培杰 吴剑 张双琨[1] 刘伟[1] 吴战鹏[1] Wang Lianqing;Ding Peijie;Wu Jian;Zhang Shuangkun;Liu Wei;Wu Zhanpeng(State Key Laboratory of Organic-Inorganic Composites,Beijing University of Chemical Technology,Beijing 100029;Shandong Xinlong Group Co.,Ltd.,Weifang City,Weifang 262700)

机构地区：[1]北京化工大学有机无机复合材料国家重点实验室,北京100029 [2]山东新龙集团有限公司,潍坊262700

出　　处：《化工新型材料》2023年第6期76-80,共5页New Chemical Materials

基　　金：国家自然科学基金(51773010)。

摘　　要：针对三元乙丙橡胶(EPDM)的非极性特点所带来的界面粘接性能较差的技术问题,采用密炼机改性及单螺杆挤出工艺,对EPDM进行接枝极化改性,获得了不同接枝率的改性EPDM(g-EPDM)。并将g-EPDM作为第二基体制备了EPDM绝热材料,研究了其对EPDM绝热材料的加工性能、力学性能、烧蚀性能和粘接性能的影响。结果表明,g-EPDM接枝率的增大及其添加量的增加都有助于提高EPDM绝热材料与金属的粘接强度;当g-EPDM添加量为30份时,接枝率为0.305%的g-EPDM(0.305%-g-EPDM)填充的EPDM绝热材料具有较优异的加工性能和粘接性能,其与铝片的粘接性能达3.8MPa,相较不添加g-EPDM的绝热材料提高了79.2%。0.305%-g-EPDM添加量为15份时,EPDM绝热材料的综合性能最佳,其抗拉强度为11.4MPa,断裂伸长率达500%以上,线烧蚀率为0.058mm/s,与铝片的粘接剪切强度为3.06MPa。To improve the poor adhesion caused by the non-polar characteristics of EPDM,EPDM was grafted and polarized by polar monomer in internal mixer and fellow by a single screw extruder processing to obtain modified EPDM(g-EPDM)with different grafting ratios.The g-EPDM was used as a second substrate to prepare EPDM insulation materials,and the effects of g-EPDM on the processing properties,mechanical properties,adhesive and ablative performance of EPDM insulation materials were studied.The results showed that the increase of the grafting rate of g-EPDM or the increase of its addition could improve the bonding strength of EPDM insulation materials with metal.When the addition of g-EPDM was 30 phr,the grafting rate of g-EPDM was 0.305%,the EPDM insulation had excellent processing and bonding performance,and its bonding performance with aluminum sheet reached 3.8MPa,which was 79.2%higher than that of EPDM insulation without g-EPDM.When the addition amount of 0.305%-g-EPDM was 15 phr,the comprehensive performance of EPDM insulation material was the best,and the tensile strength,elongation at break,bonging strength with aluminum sheet,and linear ablation rate reach 11.4MPa;over 500%;3.06MPa and 0.058mm/s,respectively.

关 键 词：三元乙丙橡胶 接枝改性 粘接强度 线烧蚀率 绝热材料 

分 类 号：V435[航空宇航科学与技术—航空宇航推进理论与工程]