摘要
研究了常压下采用含苯甲酸乙酯的钛系负载型催化剂的丙烯聚合动力学,并用动力学方法测定了这一催化体系聚合加氢和不加氢的活性中心比浓度[C~*],聚合速率常数Kp,链增长活化能△E.结果是加氢聚合在30～50℃温度下[C~*]值为5×10^(-3)～15×10^(-3)mol/molTi,Kp 值为65～94 L/mol·s,△E为19.2kJ/mol;不加氢聚合[C~*]值为1×10^(-3)～3.5×10^(-3)mol/molTi,Kp 值为527—766 L/mol·s,△E 为16.7kJ/mol.讨论了聚合加氢对丙烯聚合的影响.
The kinetics of propylene polymerization with suppoted titanium catal-yst at normal pressure has been studied.The number of active site[C~*],reactionrate constant Kp,and activation energy ΔE of the above polymerization processeswere determined by kinetic method.The values of[C~*],Kp,and ΔE were foundto be 5×10^(-3)～15×10^(-3)mol/mol Ti,65～94 L/mol.sec,and 19.2 kJ/mol respectively,in the presence of H_2;and 1×10^(-3)～3.5×10^(-3)mol/mol Ti,527～766 L/mol.sec,and16.7 kJ/mol respectively,in the absence of H_2.The effects of hydrogen on thepolymerization of propylene with supported titanium catalyst were discussed.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
1993年第4期9-14,共6页
Acta Scientiarum Naturalium Universitatis Sunyatseni
关键词
催化剂
丙烯
聚合
钛系
负载型
suported catalyst
Ziegler-Natta catalyst
propylene polymerization
kinetics
