The kinetic behavior of hydrogenation of styrene butadiene styrene tri block copolymers (SBS, S/B=3/7,linear) using the bis (cyclopentadineyl) titanium dichloride (Cp2TiCl2) as a catalyst and dimethyl (o-) phthialate (DMP) as a cocatalyst was systematically studied. It was showed that the catalysts had a high activity and a high selectivity with phenyl not being hydrogenated. The kinetics equation of hydrogenation,which was obtained with proper concentrations of the catalyst and the cocatalyst at 76℃ and under proper H2 pressure,was -d[c(C=C) ]/dt =kc1 (C=C )p1.12 (H2 )c1 (Ti )c-2 (DMP), and the activation energy of hydrogenation between 70~84℃ wad 83.48KT/mol.The structure of the products were also studied by 1H-NMR specta.The result indicated that 1,2-PB inits and trans-1,4 PB units were hydrogenated prior to cis-1,4-PB inits,and were fully hydrogenated.
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References
[1 ] Charles W Strobel. Hydrogenation of polymers [P] . USA ,3646142. 1972202229
[2 ] Yasushi Kishimoto , Hideo Morita. Method for hydro-genation of polymer [ P] . J PN , 582186983. 1983210207
[3 ] 李 伟,贺小进,陈建军,等. 二氯二茂钛用于丁苯嵌段共聚物加氢的研究[J ] . 化工科技,2001 ,9 (4) :19 - 23
[4 ] 尹绍明,李望明,梁红文,等. 一种含共轭二烯烃聚合物的选择氢化方法[ P] . 中国专利,1166498A. 1997212203
[5 ] 陆 逸,徐瑞清,金关泰,等. 丁苯嵌段共聚物的氢化反应研究[J ] . 北京化工学院学报,1982 ,9 (3) :103 - 113
[6 ] 张云云,郭 昕,岳冬梅,等. Rh2Ru 双金属催化剂的NBR 加氢动力学研究[J ] . 北京化工大学学报,2000 ,27(4) :56 - 58
[7 ] 张红星,宁朝晖,黄丽芳. 苯乙烯类热塑性弹性体部分双键氢化研究[J ] . 弹性体, 2003 ,13 (2) :22 - 25
[8 ] 吴蕙君,陈 良,杨 芝,等. 有机化学[M] . 上海:华东师范大学出版社,1995 ,178 - 201
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Footnotes
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