| RING OPENING POLYMERIZATION OF PROPYLENE SULFIDE BY RARE EARTH COORDINATION CATALYSTS* |
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| 引用本文： | 沈之荃,张一烽,彭建德,凌陇. RING OPENING POLYMERIZATION OF PROPYLENE SULFIDE BY RARE EARTH COORDINATION CATALYSTS*[J]. 中国科学B辑(英文版), 1990, 0(5) |
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| 作者姓名： | 沈之荃 张一烽 彭建德 凌陇 |
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| 作者单位： | Department of Chemistry，Zhejiang University，Hangzhou 310027，PRC，Department of Chemistry，Zhejiang University，Hangzhou 310027，PRC，Department of Chemistry，Zhejiang University，Hangzhou 310027，PRC，Department of Chemistry，Zhejiang University，Hangzhou 310027，PRC |
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| 基金项目： | Project supported by the National Natural Science Foundation of Chins, the National Education Commission of China and Chinese Petrochemical Corporation. |
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| 摘 要： | Ring opening polymerization of propylene sulfide using rare earth coordination catalysts has been investigated for the first time. It has been found that trinary rare earth coordination catslysts composed of rare earth compounds of phosphonate, naphthenate or acetylacetonate, trialkyl sluminum and water are effective catalysts for the polymerization of propylene sulfide. The polymerization in toluene is a homogeneous reaction. High molecular weight as high as several million poly(propylene sulfide) with high yield can be prepared by these catalysts. Kinetic studies showed that the polymerization rate is of first order with respect to both monomer concentration and catalyst concentration. The activation energy of the polymerization reaction is 61.4 k fJ/mol. The structure of the polymers so obtained has also been characterized by ~(13)C NMR spectroscopy, X-ray diffraction, gel permeation chromatography and differential scanning calorimetry.
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RING OPENING POLYMERIZATION OF PROPYLENE SULFIDE BY RARE EARTH COORDINATION CATALYSTS* |
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| SHEN ZHI-QUAN ZHANG YI-FENG PENG JIAN-DE AND LING LONG. RING OPENING POLYMERIZATION OF PROPYLENE SULFIDE BY RARE EARTH COORDINATION CATALYSTS*[J]. Science in China(Chemistry), 1990, 0(5) |
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| Authors: | SHEN ZHI-QUAN ZHANG YI-FENG PENG JIAN-DE AND LING LONG |
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| Abstract: | Ring opening polymerization of propylene sulfide using rare earth coordination catalysts has been investigated for the first time. It has been found that trinary rare earth coordination catslysts composed of rare earth compounds of phosphonate, naphthenate or acetylacetonate, trialkyl sluminum and water are effective catalysts for the polymerization of propylene sulfide. The polymerization in toluene is a homogeneous reaction. High molecular weight as high as several million poly(propylene sulfide) with high yield can be prepared by these catalysts. Kinetic studies showed that the polymerization rate is of first order with respect to both monomer concentration and catalyst concentration. The activation energy of the polymerization reaction is 61.4 k fJ/mol. The structure of the polymers so obtained has also been characterized by ~(13)C NMR spectroscopy, X-ray diffraction, gel permeation chromatography and differential scanning calorimetry. |
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| Keywords: | rare earth compounds coordination catalysts propylene sulfide ring opening polymerization kinetics. |
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