摘要
研究了在２５℃加氢汽油介质中，铁系胶体催化剂［Ｆｅ（ｎａｐｈ）２Ａｌ（ｉＢｕ）３—ＣＨ２ＣＨＣＨ２Ｃｌ］单组分、多组分按不同配比混合，非水体系电导率与浓度的关系，结合Ｔｙｎｄａｌ效应，聚合实验结果，得出Ａｌ（ｉＢｕ）３以缔合状态存在并解离成离子对；它同环烷酸亚铁的作用是形成胶核的主要反应，与氯丙烯反应生成的氯化异丁基铝，在胶核表面参与形成活性中心；由过量Ａｌ（ｉＢｕ）３解离的离子对形成的双电层结构，使胶粒保持相对稳定．催化剂各组分较佳配比对应稳定胶粒的形成；它具有颗粒小、均匀、较高的催化活性．催化体系加入丁二烯引起电导率下降表明活性中心是正离子性的．
Single component and multi component of iron system colloidal catalyst Fe(naph)_2Al(i- Bu)_3CH_2CHCH_2Cl were mixed by different ratios in hydrogenated gasoline medium at 25℃.This paper studied the relationship between the nonaqueous systematic electroconductivity and the concentration of catalyst components.In combination with Tyndall effect,polymerization experimental results,Al(i-Bu)_3 existed in associated state and dissociated into ionpair.The reaction between Al(i-Bu)_3 and Fe(naph)_2 was the main reaction which formed colloidal core.Al(i-Bu)_3 reacted on CH_ 2CHCH_ 2Cl and Al(i- Bu)_2Cl was yielded which joined the formation of active center on the surface of colloidal core.The excessive Al(i- Bu)_3 was dissociated into ionpair which formed double electrode layer,and the double electrode layer kept the colloidal particles relatively stable.The optimal components ratio of the catalyst formed stable colloidal particles which were tiny,uniform and with high catalytic activity.When butadiene was added into the catalytic system the decline of the electroconductivity showed that the active center was the positive ionicity.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1998年第3期262-268,共7页
Acta Polymerica Sinica
基金
国家自然科学基金
