研究了取代茚基二价稀土配合物(C5H9C9H6)2Yb(THF)2作为单组分催化剂,催化DMAEMA/MMA的共聚反应.结果表明,(C5H9C9H6)2Yb(THF)2对DMAEMA/MMA的共聚反应具有较高的催化活性,温度对共聚反应影响明显,单体配比对共聚反应的转化率影响不大,几种取代茚基二价稀土配合物都显示出较高的催化活性.其活性次序为:(C5H9C9H6)2Sm(THF)＞(C2H5C9H6)2Sm(THF)2＞(C5H9C9H6)2Yb(THF)2＞KSm(C5H9C9H6)3(THF)3＞(PhCH2C9H6)2Sm(THF)2.对聚合产物进行了热分析的表征,发现产物为两种单体的无轨共聚物.通过核磁共振技术确定了共聚物中两种单体所占的比例,并测定了(C5H9C9H6)2Yb(THF)2催化DMAEMA/MMA的共聚反应的竟聚率,其竟聚率为r1=0.98,r2=0.71.
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