| PHA与TDI本体聚合反应动力学 |
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| 引用本文： | 陈建福,张卫英,李晓,罗启涛. PHA与TDI本体聚合反应动力学[J]. 高分子材料科学与工程, 2012, 0(5): 77-80 |
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| 作者姓名： | 陈建福 张卫英 李晓 罗启涛 |
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| 作者单位： | 福州大学化学化工学院;福建省三棵树涂料股份有限公司 |
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| 基金项目： | 福建省区域科技重大项目(2009H4005) |
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| 摘 要： | 用滴定法测定了甲苯二异氰酸酯(TDI),聚酯多元醇(聚己二酸己二醇酯PHA)在无催化剂和有催化剂时的本体聚合反应动力学。结果表明,TDI和PHA为二级反应,无催化剂时反应活化能为41.58 kJ/mol,在二月桂酸二丁基锡(DBTDL)催化下,活化能降为34.02 kJ/mol,说明催化剂能有效降低反应的活化能,提高反应速率。但无论有无催化剂,反应后期体系黏度均升高,反应逐步转为扩散控制而偏离二级动力学规律。
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| 关 键 词： | 聚氨酯 反应动力学 聚己二酸己二醇酯 |
Reaction Kinetics of the PHA/TDI Bulk Polymerization |
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| Jianfu Chen,Weiying Zhang,Xiao Li,Qitao Luo. Reaction Kinetics of the PHA/TDI Bulk Polymerization[J]. Polymer Materials Science & Engineering, 2012, 0(5): 77-80 |
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| Authors: | Jianfu Chen Weiying Zhang Xiao Li Qitao Luo |
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| Affiliation: | 1.College of Chemistry and Chemical Engineering,Fuzhou University,Fuzhou 350108,China;2.Sankeshu Paint Joint-Stock Limited Company,Putian 351100,China) |
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| Abstract: | Reactive kinetics of the toluene-2,4-diisocyanate(TDI)/polyhexa-methylene adipate diol(PHA) bulk polymerization with or without catalyst was studied by means of titration analysis.The results indicate that the polymerization of TDI/PHA is a second order reaction,and the activation energy is 41.58 kJ/mol without catalyst and reduced to 34.02 kJ/mol with dibutyltion dilaurate(DBTDL) as catalyst,indicating that the catalyst can decrease the activation energy and improve the reaction rate.The reaction system viscosity increases at the later reaction stage whether the catalyst in the system or not,and the reaction is turned gradually to the diffusion control and deviates from the second order reaction kinetics. |
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| Keywords: | polyurethane reaction kinetics polyhexamethylene adipate diol |
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