双马来酰亚胺树脂/SiO_2纳米复合材料的制备及性能  

Preparation and properties of bismaleimides resin/SiO_2 nanocomposites

作　　者：柳准[1] 赵梦溪[1] 孙闯[1] 徐启杰[1] 

机构地区：[1]黄淮学院化学化工系,河南驻马店463000

出　　处：《化学研究》2016年第2期241-245,共5页Chemical Research

基　　金：驻马店市科技攻关;黄淮学院校级科研项目(201512713;201512701)

摘　　要：以表面含有胺基官能团的纳米SiO_2为填料,通过一步原位聚合法制备双马来酰亚胺树脂/SiO_2纳米复合材料(BMI/SiO_2).采用热重分析仪(TGA)、红外光谱分析仪(FTIR)、邵氏D硬度计(H)等仪器设备对BMI/SiO_2纳米复合材料进行测试分析,探讨纳米SiO_2对双马来酰亚胺聚酯树脂的热稳定性能、硬度和界面强度的影响.结果表明,所制备的BMI/SiO_2纳米复合材料的硬度随加入的纳米SiO_2含量的增加,呈现逐渐升高趋势.当纳米SiO_2含量为3%时,相对于双马来酰亚胺聚酯,复合材料的硬度提高了80%.通过热稳定性分析可知,纳米SiO_2的加入降低了双马来酰亚胺树脂基体材料的热分解温度,使其从458℃降低到451℃.通过对双马来酰亚胺/SiO_2纳米复合材料的界面分析发现,纳米SiO_2的表面接枝了双马来酰亚胺分子链,说明纳米SiO_2参与了双马来酰亚胺的聚合过程,有利于提高聚合物基体材料与填料间的界面强度,进而提高复合材料的机械性能.Bismaleimides/SiO2 nanocomposites（BMI/SiO2）was prepared readily by in situ polymerization method with nano-SiO2 with surface amino groups used as the filler.The characteristics of namocomposites were studied by TGA,FT-IR,Shore hardness tester（D）,and so on.Furthermore,the effects of nano-SiO2 on the thermal stability performance,hardness of bismaleimides,and interfacial strength between nano-SiO2 and bismaleimides were studied.The results showed that the hardness of as-prepared BMI/SiO2 nanocomposites were gradully improved with increasing the amount of nano-SiO2,increased by 80%in comparison with BMI imide polyester when the nano-SiO2 content was 3%.It indicated that nano-SiO2 significantly improved the hardness of bisimide.The thermal stability analysis showed that the thermal decomposition temperature of BMI was 458℃,however,the addition of nano-SiO2 led to decreasing the decomposition temperature of BMI matrix.Thermal decomposition temperature reached to 451 ℃ when the amount of nano-SiO2 was added to 9%.This showed that thermal decomposition temperature of bismaleimide polyester gradually decreased with the addition of nano-SiO2.Additionally,BMI molecular chains anchored on the surface of nano-SiO2 by chemically bonding action because the surface amino groups of nano-SiO2 particuted in the polymerization process of BMI.It resulted in the improvement for the interfacial strength of nano-SiO2 and BMI.

关 键 词：原位聚合 纳米复合材料 力学性能 硬度 纳米SIO2 交联度 

分 类 号：O635.2[理学—高分子化学]