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分别采用十六烷基三甲基溴化铵(CTAB)、CTAB与聚乙二醇400(PEG400)的复合体系对蛭石进行有机化处理,然后用有机改性的蛭石、甲基丙烯酸-β-羟乙酯、异佛尔酮二异氰酸酯、PEG400进行复合插层反应,制得丙烯酸酯类聚氨酯/蛭石纳米复合材料,并对有机处理前后的蛭石结构和复合材料的性能进行了表征。结果表明,经有机处理后,蛭石层间距明显增大,用CTAB/PEG400复合体系做插层剂时,蛭石的层间距较大;当有机蛭石质量分数为1.00%时,复合材料的综合性能较佳,拉伸强度为25.09MPa,拉伸断裂伸长率为30.02%,冲击强度为40.48kJ/m2,玻璃化转变温度为85.51℃,分别较纯丙烯酸酯类聚氨酯提高了12.5%、36.9%、446.3%、6.86℃。
The vermiculite was organically treated with cetyltrimethylammonium bromide (CTAB), CTAB and polyethylene glycol 400 (PEG400), respectively, and then modified with organic vermiculite, methacrylic acid - β-hydroxyethyl ester, isophorone diisocyanate, and PEG400 for intercalation reaction, the acrylate polyurethane / vermiculite nanocomposites were prepared, and the properties of vermiculite and composite before and after organic treatment were characterized . The results showed that the interlayer distance of vermiculite obviously increased after organic treatment. When CTAB / PEG400 composite system was used as intercalating agent, the interlayer distance of vermiculite was large. When the content of organic vermiculite was 1.00% The tensile strength is 25.09MPa, the tensile elongation at break is 30.02%, the impact strength is 40.48kJ / m2, the glass transition temperature is 85.51 ℃, which is 12.5% higher than the pure acrylate polyurethane, 36.9%, 446.3%, 6.86 ° C.