摘要
通过Ｔｙｎｄａｌ效应，电镜观察，电导率测定，结合聚合实验，发现铁体系催化剂在加氢汽油介质中为胶体催化剂，而且是聚结不稳定胶体体系．催化剂各组分配比，加入顺序影响胶粒的形态，因而影响到催化活性与聚合物微观结构．其中较佳配比，较佳加入顺序（Ｆｅ）∶（Ｃｌ）∶（Ａｌ）＝１∶２．５∶２０，催化剂颗粒比较小，均匀，因而比表面积大，催化活性高，相反其他配比的颗粒大，不均匀，催化活性低．陈化使胶粒聚集变大，故催化活性降低．
By means of Tyndall effect investigation,electromicroscope observation, electroconductivity measurement,and in combination with the consideration of the polymerization experiment result,it was found that Fe(naph) 2 Al(i Bu) 3—CH 2=CHCH 2Cl despersed in hydrogenated gasoline medium was a coalescence unstable colloidal catalyst system.Component ratios and feeding order of catalyst affected the form of the colloidal particles and further affected the catalytic activity and the microstructure of polymer.The optimal component ratio and feeding order were found to be Fe ∶ Cl ∶ Al =1∶2 5∶20,and the catalytic particles were tiny and uniform,so the specifical surface area was large and the catalytic activity was high.But it was not so for other ratios.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1997年第5期537-542,共6页
Acta Polymerica Sinica
基金
国家自然科学基金
关键词
胶体催化剂
丁二烯聚合
活性
催化剂
铁系
Colloidal catalyst,Tyndall effect,Ageing,Electroconductivity
