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| 环氧丙烷阴离子聚合及反应动力学 | |
| 引用本文： | 朱叙伟,杨鹏飞,李俊英,李天铎. 环氧丙烷阴离子聚合及反应动力学[J]. 高分子材料科学与工程, 2010, 0(3): 15-18 |
| 作者姓名： | 朱叙伟 杨鹏飞 李俊英 李天铎 |
| 作者单位： | 山东轻工业学院轻化与环境工程学院;江南大学化学与材料工程学院; |
| 基金项目： | 国家自然科学基金资助项目(20676074) |
| 摘 要： | 用六甲基磷酰三胺作溶剂,叔丁醇钾作引发剂进行环氧丙烷的活性聚合反应,得到分子量分布系数为1.04的聚环氧丙烷,用红外光谱(IR)和核磁共振(1H-NMR)表征产物结构,确定了1H-NMR谱图中各峰的归属;用核磁共振法测定了产物的数均分子量,发现其存在2800的上限;同时,根据1H-NMR数据计算出反应中的链转移常数,链转移常数的迅速增大是产生分子量上限的原因之一;最后,用在线红外技术研究环氧丙烷阴离子聚合过程,根据吸光度-浓度工作曲线求得聚合反应的活化能为38.0kJ/mol,动力学方程为r=dC/dt=1.7×103exp(Ea/RT)C(mol.L-1.min-1)。 |
| 关 键 词： | 阴离子聚合 聚环氧丙烷 动力学 在线红外 |
Anionic Polymerization of Propylene Oxide and Its Kinetics |
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| ZHU Xu-wei,YANG Peng-fei,,LI Jun-ying,LI Tian-duo. Anionic Polymerization of Propylene Oxide and Its Kinetics[J]. Polymer Materials Science & Engineering, 2010, 0(3): 15-18 | |
| Authors: | ZHU Xu-wei YANG Peng-fei LI Jun-ying LI Tian-duo |
| Affiliation: | 1.School of Light Chemistry and Environment Engineering;Shandong Institute of Light Industry;Jinan 250353;China;2.School of Chemical and Material Engineering;Jiangnan University;Wuxi 214122;China |
| Abstract: | The polymerization of propylene oxide in hexamethyl phosphoramide(HMPT)was investigated with potassium t-butoxide as initiator.Monodisperse poly(propylene oxide)was obtained(PDI=1.04),then infrared spectroscopic(IR)and hydrogen nuclear magnetic resonance spectrum(1H-NMR)were used to characterize its structure,all the peaks in 1H-NMR spectra was assigned as well.Number average molecular weight was calculated by 1H-NMR and was limited to about 2800.Chain-transfer constants were calculated out and were found t... |
| Keywords: | anionic polymerization poly(propylene oxide) kinetics in-situ FT-IR |
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