| SYNTHESIS OF POLY(5,5-DIMETHYL-1,3-DIOXAN-2-ONE)BY LIPASE-CATALYZED RING-OPENING POLYMERIZATION |
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| 作者姓名： | 贺枫 卓仁禧 |
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| 作者单位： | Department of Chemistry Wuhan University Wuhan 430072，China，Department of Chemistry Wuhan University Wuhan 430072，China |
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| 基金项目： | The authors are grateful for the financial support of the National Natural Science Foundation of China (No. 20104005) and Hubei Province Natural Science Foundation of China (No. 2001B053) and a grant from National Key Fundamental Research Program of Chin |
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| 摘 要： | Porcine pancreas lipase (PPL) and PPL immobilized on narrow distributed micron-sized glass beads wereemployed successfully for the ring-opening polymerization of 5, 5-dimethyl-1, 3-dioxan-2-one (DTC) for the first time.Different polymerization conditions such as enzyme concentration and reaction temperature were studied. Immobilized PPLexhibits higher activity than native PPL. Along wth the increasing enzyme concentration, the molecular weigh of resultingPDTC decreases. PPL immobilized on narrow distributed micron-sized glass beads has outstanding recyclability. For thethird recycle time, immobilized PPL exhibits the highest catalytic activity and with high activity even after the fifth recyletime for the synthesis of PDTC. The ~1H-NMR spectra indicate that decarboxylation does not occur during the ring-openingpolymerization.
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| 收稿时间： | 2002-08-30 |
| 修稿时间： | 2002-09-18 |
SYNTHESIS OF POLY(5,5-DIMETHYL-1,3-DIOXAN-2-ONE)BY LIPASE-CATALYZED RING-OPENING POLYMERIZATION* |
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| Feng He,Ying-xia Wang,Ren-xi Zhuo.SYNTHESIS OF POLY(5,5-DIMETHYL-1,3-DIOXAN-2-ONE)BY LIPASE-CATALYZED RING-OPENING POLYMERIZATION[J].Chinese Journal of Polymer Science,2003,0(1):5-8. |
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| Authors: | Feng He Ying-xia Wang Ren-xi Zhuo |
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| Institution: | Department of Chemistry Wuhan University Wuhan 430072; China |
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| Abstract: | Porcine pancreas lipase (PPL) and PPL immobilized on narrow distributed micron-sized glass beads wereemployed successfully for the ring-opening polymerization of 5, 5-dimethyl-1, 3-dioxan-2-one (DTC) for the first time.Different polymerization conditions such as enzyme concentration and reaction temperature were studied. Immobilized PPLexhibits higher activity than native PPL. Along wth the increasing enzyme concentration, the molecular weigh of resultingPDTC decreases. PPL immobilized on narrow distributed micron-sized glass beads has outstanding recyclability. For thethird recycle time, immobilized PPL exhibits the highest catalytic activity and with high activity even after the fifth recyletime for the synthesis of PDTC. The ~1H-NMR spectra indicate that decarboxylation does not occur during the ring-openingpolymerization. |
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| Keywords: | Enzymatic polymerization Immobilized enzyme Ring-opening polymerization Polycarbonates |
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