茂钛催化剂用于SBS均相加氢的研究  

Application of Titanocenes to Homogeneous Hydrogenation of SBS

作　　者：陈建军[1] 李伟[1] 贺小进[1] 冯增国[2] 

机构地区：[1]中国石油化工股份有限公司北京燕山分公司研究院,北京102500 [2]北京理工大学材料学院,北京100081

出　　处：《石化技术》2004年第1期1-5,共5页Petrochemical Industry Technology

摘　　要：在烷基锂助催化剂存在下,分别以双环戊二烯二氯化钛、双环戊二烯二芳基钛为催化剂对苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)进行加氢反应,用傅里叶红外光谱和核磁共振氢谱分析了氢化前后聚合物结构的变化。为优化加氢反应条件,分别考察了活性基础聚合物组成、Li/Ti、催化剂用量、加氢温度、压力等对加氢效果的影响。当催化剂用量为0.2～0.4 mmol/100 g聚合物时,反应2 h,可达到二烯烃段加氢度大于98％的良好效果。另外,对茂钛加氢反应机理进行了初步探索。A series of titanocenes catalyst including Ti(Ti5-C5H5)2Cl2, Ti(η5-C5H5)2-(MeC6H4)2, Ti(η5-C5H5)2-(C6H5)2 screened separately as catalyst was hydrogenated with styrene-butadiene-styrene block copolymer (SBS) at the existence of lithium alkylide promoter. The structure of polymer before and after hydrogenation was analyzed by FTIR and 'H-NMR. The hydrogenation effecting factors, such as polymer component of active base, the ratio of Li to Ti, dosage of catalyst, temperature and hydrogen pressure, were investigated to optimize reaction condition. When the amount of catalyst was between 0.2-0.4 mmol/100 g polymer, the hydrogenation efficiency can reach 98% after hydrogenation for 2 hours. In addition, hydrogenation reaction theory for titanocenes was explored preliminarily.

关 键 词：茂钛催化剂 SBS 均相加氢技术 双环戊二烯二氯化钛 热塑性弹性体 苯乙烯 丁二烯 

分 类 号：TQ334[化学工程—橡胶工业]