以丙烯酰胺(AM)、2-丙烯酰胺-2-甲基丙磺酸钠(AMPS)、马来酸酐(MA)和蚋米二氧化硅为亲水单体,苯乙烯(St)为疏水单体,十二烷基硫酸钠(SDS)为乳化剂,采用微乳液自由基聚合法制备了一种具有疏水缔舍结构的聚合物基蚋米二氧化硅复合材料.通过红外光谱、透射电镜、扫描电镜、粒径分布测试和凝胶渗透色谱法表征了聚合物蚋米材料的分子结构和相对分子质量,探讨了聚合物基蚋米二氧化硅在水溶液中疏水缔合特性,增粘性,抗温、耐温性及耐盐性能的影响规律.结果表明,当聚合物分子中含有1%的苯乙烯单体时,聚合物有较好的疏水缔合作用,纳米二氧化硅的引入可使聚合物分子在水溶液中产生特殊的微交联结构,且增粘性及热稳定性得到改善明显,复合材料热分解温度约为290℃,在室温至500℃范围内该材料的热失重总量仅为60%.
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