SBS选择性催化加氢动力学研究

梅铭1; 李蕾1,*;张红星2;

北京化工大学学报(自然科学版) ›› 2004, Vol. 31 ›› Issue (4) : 82-86.

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北京化工大学学报(自然科学版) ›› 2004, Vol. 31 ›› Issue (4) : 82-86.
研究论文

SBS选择性催化加氢动力学研究

  • 梅铭; 李蕾,*;张红星;
作者信息 +

Kinetic studies of SBS catalytic hydrogenation with high selectivity

  • Mei Ming 1;Li Lei 1,*;Zhang Hong-xing2;
Author information +
文章历史 +

摘要

以双环戊二烯二氯化钛(Cp2TiCl2)为主催化剂,邻苯二甲酸二甲酯(DMP)为助催化剂研究了苯乙烯丁二烯嵌段共聚物选择性催化加氢动力学。在76℃、适宜的氢气压力以及主、助催化剂浓度下进行SBS加氢动力学研究得到动力学方程为-d[c(C=C) ]/dt =kc1 (C=C )p1.12 (H2 )c1 (Ti )c-2 (DMP),相应的在70~84℃范围内加氢反应活化能为83.48kJ/mol。对加氢产物微观结构分析表明该催化体系加氢效率高,选择性高,且对SBS中PB链段1,2-结构和反式1,4-结构先加氢,并且达到完全饱和.

Abstract

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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导出引用
梅铭1; 李蕾1,*;张红星2;. SBS选择性催化加氢动力学研究 [J]. 北京化工大学学报(自然科学版), 2004, 31(4): 82-86
Mei Ming 1;Li Lei 1,*;Zhang Hong-xing2;. Kinetic studies of SBS catalytic hydrogenation with high selectivity[J]. Journal of Beijing University of Chemical Technology, 2004, 31(4): 82-86

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