| s-PB/TPI釜内原位聚合共混物的非等温结晶动力学 |
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| 引用本文： | 李皓,宗成中.s-PB/TPI釜内原位聚合共混物的非等温结晶动力学[J].弹性体,2011,21(4):10-14. |
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| 作者姓名： | 李皓 宗成中 |
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| 作者单位： | 青岛科技大学橡塑材料与工程教育部重点实验室,山东 青岛,266042 |
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| 基金项目： | 国家自然科学基金资助项目(51073086) |
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| 摘 要： | 采用2种负载型催化体系在反应釜内原位合成了间同聚丁二烯（s-PB）及s-PB/反式-1,4-聚异戊二烯（TPI）（80/20）共混物。用DSC方法研究了s-PB及共混物的非等温结晶行为,结果表明：Jeziorny修正的Avrami法和Mo法对s-PB及s-PB/TPI（80/20）共混物的非等温结晶行为有较好的适用性,Ozawa法则存在一定的缺陷。s-PB及其共混物的结晶活化能分别为-253 kJ/mol和-310 kJ/mol。TPI的加入降低了s-PB的结晶速率,使得共混物的结晶活化能绝对值增大。
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| 关 键 词： | 负载型催化体系 间同聚丁二烯 非等温结晶行为 结晶活化能 |
Nonisothermai crystallization kinetics of syndiotactic 1,2-polybutadiene/trans-1,4-polyisoprene blends of in-situ polymerization |
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| LI Hao,ZONG Cheng-zhong.Nonisothermai crystallization kinetics of syndiotactic 1,2-polybutadiene/trans-1,4-polyisoprene blends of in-situ polymerization[J].China Elastomerics,2011,21(4):10-14. |
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| Authors: | LI Hao ZONG Cheng-zhong |
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| Affiliation: | LI Hao,ZONG Cheng-zhong(Key Laboratory of Rubber-Plastics,Ministry of Education,Qingdao University of Science and Technology,Qingdao 266042,China) |
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| Abstract: | s-PB,s-PB/TPI(80/20) blends were prepared in the reactor with supported catalysts SiO2/Co(naph)2-Al(i-Bu)3-CS2 and MgCl2·SiO2/TiCl4-Al(i-Bu)3.The nonisothermal crystallization kinetics of s-PB and s-PB/TPI were investigated by DSC.The results showed that the Avrami method modified by Jeziorny and the Mo method are feat,but the Ozawa method has a blemish to s-PB.The activation energies have been evaluated by Kissinger method to be-253 kJ/mol and-310 kJ/mol for s-PB and the blends.The TPI has decreased the crystal rates.The absolute value of activation energy of crystallization of s-PB/TPI blends is higher than s-PB. |
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| Keywords: | supported catalysts syndiotactic 1 2-polybutadiene nonisothermal crystallization activation energy of crystallization |
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