摘要
用电导率法并配合化学分析及聚合实验,研究了用于丁二烯聚合的Mo(Ⅴ)催化剂各组分间的相互作用。结果表明,MoCl_5与n-C_8H_(17)OH的置换反应在50℃以上才明显发生。当Al/Mo(mol比)值为2～10时,MoCl_5与Al(i-Bu)_3体系的电导率随Al/Mo值的变化与所形成催化剂的聚合活性有对应关系。Al/Mo大于5,MoCl_5或MoCl_4均可被还原到电导率大致相同的状态,但电导率的测定表明,它们还原到这种状态的途径不同。
Interactions among components of Mo(V) catalyst system used in polymerization of butadiene were investigated by using the conductivity method accompanied with the chemical analysis and polymerization experiments . The results showed that the replacement reaction of MoCl5 by n -C8H17OH occured obviously above 50°C only . In the molar ratio range of Al/Mo 2 - 10 , there was a corresponding relation between conductivity - Al/Mo change and catalytic activity-Al/Mo change for the mixed system of Mods and Al (i-Bu)3 .When Al/Mo was larger than 5 ,MoCl5 or MoCl4 could be reduced approximately to a same conductivity state , but the conductivity measurement revealed that the course from MoCl5 to this state was different from the course of MoCl4 to this state .
出处
《合成橡胶工业》
CAS
CSCD
北大核心
1991年第6期405-408,共4页
China Synthetic Rubber Industry
基金
国家自然科学基金
关键词
聚丁二烯
聚合
催化剂
五氯化钼
molybdenum pentachloride
Ziegler - Natta catalyst
conductivity
butadiene
solution polymerization
polybutadiene
