作　　者： ; ;

机构地区： 四川大学高分子科学与工程学院高分子材料工程国家重点实验室

出　　处： 《高分子学报》 2004年第2期208-212,共5页

摘　　要： 通过对双酚A型苯并嗪中间体 (BOZ A) 蛭石插层纳米复合物固化过程的分析表明长链烷基铵阳离子对BOZ A的热开环聚合反应没有表现出催化作用 ,也不影响纳米复合物的结构形态 .不同蛭石含量的插层纳米复合物 ,在形成不同纳米分散状态的纳米复合物的过程中 ,蛭石晶片对BOZ A的热开环聚合具有明显不同的阻碍作用 ,蛭石含量为 3%的插层纳米复合物 16 0℃的凝胶化时间较纯树脂延长约 7min ,活化能升高约8kJ mol,固化反应热焓降低约 14J g ,使得固化物的固化程度较纯树脂降低约 7%～ 10 % ,阻碍作用最大 。 In the curing reaction processing of BOZ-A/vermiculite nanocomposites intercalated with polybenzoxazine (bisphenol A type) precursor (BOZ-A), the acidic onium poton on the organophilic vermiculite surface has not emerged catalytic effect on the ring-opening polymerization of BOZ-A. It may be indicated that different retarding effects took place while different kinds of dispersed status ('intercalation' and/or 'exfoliation') of vermiculite layers were forming, which were correlative with the content of vermiculite in resin matrix. As the content of vermiculite is about 3 wt%, the curing retardance is serious, compared with that of pristine BOZ-A, the t(gel) and the curing activation energy ( Ea) of BOZ-A in the nanocomposites increased 7min and 8 kJ/mol, respectively, and the curing enthalpy (DeltaH(d)) decreased by 14 J/g. As a result, the cure-degree of resin decreased by 7% similar to 10%. With the increase of vermiculite content, the curing retardance becomes not obvious.

关 键 词： 苯并噁嗪中间体 蛭石 插层纳米复合物 热固化行为 热开环聚合 热固性树脂

领　　域： [化学工程] [一般工业技术]