摘要
通过改变环烷酸镍─三异丁基铝─三氟化棚乙醚络合物［（Ni（naph）2－Al（i－Bu）3－BF3OEt2）］体系中催化剂的配比，丁二烯浓度，聚合温度等聚合条件，考察了它们对适宜Al／B比活性范围的影响，结果表明：采用固定Ni变Al或者固定Al变Ni两种方式改变Al／Ni摩尔比，都能有效地调节适宜Al／B比范围，并认为目前工业生产顺丁橡胶的配方中Al／Ni＝4是太低的，有必要适当加以提高；丁二烯浓度太低时，适宜Al／B比范围很窄，从提高聚合活性和聚合速率来看，适当地提高丁二烯浓度是有益的；在一定范围内改变聚合温度，对适宜Al／B比范围没有明显影响。
The suitable ranges of Al/B ratio for polymerization in the Ni (naph)2-Al (i-Bu)3-BF3. OEt2 system were studied by changing the formula of catalyst,. the concentration of butadiene and the polymerizalion temperature,the experimental results showed: if Al/Ni ration was varied by means of either changing the amount of Al (with the amount of Ni constant ) or altering the amount of Ni (with the amount of Al unchanged), the suitable range of Al/B ratio would be effectively adjusted; the concentration of butadiene should be high enough so as to maintain the high catalytic activity and polymerization rate.
出处
《广州化学》
CAS
1994年第3期17-23,共7页
Guangzhou Chemistry
基金
国家自然科学基金
