| 聚氧乙烯-聚氧丙烯嵌段共聚物在水溶液中的胶束化作用 |
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| 引用本文： | 戴乐蓉,莫金强.聚氧乙烯-聚氧丙烯嵌段共聚物在水溶液中的胶束化作用[J].应用化学,1987,0(3):31-34. |
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| 作者姓名： | 戴乐蓉 莫金强 |
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| 作者单位： | 北京大学化学系 |
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| 摘 要： | 本实验采用表面张力法,苯红紫可见光吸收法测定L64,AE32,AP221等三种不同结构的聚氧乙烯-聚氧丙烯嵌段共聚物的临界胶束形成浓度CMC,发现L64与AE32在低浓度下形成单分子胶束,在高浓度下形成聚集胶束。AP221则只在较低的浓度下形成聚集胶束。不同温度下CMC的测定结果表明温度对L64形成单分子胶束的CMC影响较小,而聚集胶束的浓度则随着温度升高而迅速下降,后者胶束形成热ΔH较高,为140.6kJ/mol。
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| 收稿时间： | 1986-05-26 |
| 修稿时间： | 1986-07-22 |
MICELLIZATION OF POLYOXYETHYLENE-POLYOXYPROPYLENE BLOCK COPOLYMERS IN AQUEOUS SOLUTION |
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| Dai Lerong,Mo Jinqiang.MICELLIZATION OF POLYOXYETHYLENE-POLYOXYPROPYLENE BLOCK COPOLYMERS IN AQUEOUS SOLUTION[J].Chinese Journal of Applied Chemistry,1987,0(3):31-34. |
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| Authors: | Dai Lerong Mo Jinqiang |
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| Institution: | Department of Chemistry, Peking University |
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| Abstract: | The critical micelle concentration (CMC) of three kinds of polyoxyethylene-polyoxypro-pylene block copolymer-L64, AE21, AP221 has been measured by surface tension and benzopurpurine uptake. Results showed that L64 and AE21 form monomolecular micelles at low concentration and aggregated micelles at high concentration, while AP221 only forms aggregated micelle at low concentration. Measurement of CMC at different temperature showed that in aqueous solution temperature has little effect on the CMC of L64 for monomolecular micellization, but has marked effect for aggregated micellization which decreases sharply with increase of temperature. Heat of formation of aggregated micelle has a large value, of 140.6kJ/mol. |
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