端烯丙基聚硅氧烷的合成及其在乙烯聚合中的行为

通过与大分子单体的共聚合是合成接枝聚合物的一个重要方法。已有人合成了端苯乙烯和丙烯酸酯的聚硅氧烷大分子单体,本文报道对端烯丙基聚二甲基硅氧烷的合成以及添加聚硅氧烷对Ziegler-Natta型催化剂乙烯聚合行为的影响。     

水滑石选择性催化合成三乙二醇单丁醚

The hydrotalcite (n(Mg)/n(Al)=3) calcined at 500 ℃, containing a great number of fine pores (d<3 5 nm, 34% of the all pore volume) and increased BET surface area by about three times (from 75 to 205 m 2/g), has been successfully applied to the selective ethoxylation reaction of a mixture of alcohols. The experimental results showed that the calcined hydrotalcite is an efficient solid base catalyst for synthesis of BuO(EO) 3H with high selectivity of over 90%.