CAJ | 학술논문

通过4 - 溴甲基二苯甲酮与二甲基正十八胺反应合成的季铵盐光引发剂苯甲酰苄基二甲氨基十八烷基溴化铵(BDOB),进行插层修饰蒙脱土(MMT),通过层间引发聚合法光固化制备环氧丙烯酸酯/蒙脱土(EA/MMT)纳米复合材料;利用红外光谱法对EA/MMT的光固化行为进行了研究.XRD和TEM分析结果表明,MMT在光固化复合材料中已得到插层和部分剥离;增加光引发剂浓度及提高环境温度均可提高其固化速率和双键最终转化率,氧气的存在使体系的诱导期延长,双键转化率降低;光固化反应总级数约为6～7,表观活化能为9.8 kJ/mol.
통과4 - 추갑기이분갑동여이갑기정십팔알반응합성적계안염광인발제분갑선변기이갑안기십팔완기추화안(BDOB),진행삽층수식몽탈토(MMT),통과층간인발취합법광고화제비배양병희산지/몽탈토(EA/MMT)납미복합재료;이용홍외광보법대EA/MMT적광고화행위진행료연구.XRD화TEM분석결과표명,MMT재광고화복합재료중이득도삽층화부분박리;증가광인발제농도급제고배경온도균가제고기고화속솔화쌍건최종전화솔,양기적존재사체계적유도기연장,쌍건전화솔강저;광고화반응총급수약위6～7,표관활화능위9.8 kJ/mol.
EA/MMT UV-cured nanocomposites were prepared by using modified clays and epoxy resin via intra-gallery UV-curing polymerization, and the organic modified clays were used as the only photoinitiator. The organic modified clays were modified with new potoinitiator benzoylbenzyl-N,N-dimethyl-N-octadecylammonium bromide quaternary ammonium salt, which was synthesized through the reaction of 4-bromomethyl benzophenone with octadecyl dimethyl amine. The UV-cured process kinetics of the EA/MMT nanocomposites were studied immediately after UV exposure by means of infared spectroscopy. The morphology of the EA/MMT nanocomposites was studied using XRD and TEM, and the results showed that all the samples had an intercalated structure with partial exfoliation. It was found that both curing rate (R) and ultimate vinyl conversion (C) could be raised by increasing photoinitiator concentration and elevating temperature. The oxygen possessed an inhibition effect that prolonged the induction period on the curing. And the total apparent reaction exponent and apparent activation energy were obtained within the range of 6～7 and 9.8 kJ/mol.