高等学校化学学报

高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (12): 2518.

• 研究论文 • 上一篇    下一篇

茂基二价钐配合物高效催化己内酯开环聚合

齐民华1,2, 贾惠芳1, 刘智生1, 沈琪2, 沈之荃3   

  1. 1. 茂名学院化工学院,  茂名 525000;
    2. 苏州大学化学化工系,  苏州 215006;
    3. 浙江大学高分子科学与工程系,  杭州 310027
  • 收稿日期:2010-02-01 修回日期:2010-05-15 出版日期:2010-12-10 发布日期:2010-12-06
  • 通讯作者: 齐民华 E-mail:qiminhua2002@sohu.com
  • 作者简介:齐民华, 男, 博士, 副教授, 主要从事金属有机配合物合成及催化聚合性能的研究.
  • 基金资助:

    国家自然科学基金(批准号: 20072027)资助.

High Effective Ring-open Polymerization of ε-Caprolactone Catalyzed by Bicycolopentadienyl Samarium(Ⅱ) Complex (C5H5)2Sm(THF)

QI Min-Hua1,2*, JIA Hui-Fang1, LIU Zhi-Sheng1, SHEN Qi2, SHEN Zhi-Quan3   

  1. 1. Institute of Chemical Engineering, Maoming College, Maoming 525000, China;
    2. Department of Chemistry and Chemical Engineering, Suzhou University, Suzhou 215006, China;
    3. Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2010-02-01 Revised:2010-05-15 Online:2010-12-10 Published:2010-12-06
  • Contact: QI Min-Hua E-mail:qiminhua2002@sohu.com
  • About author:齐民华, 男, 博士, 副教授, 主要从事金属有机配合物合成及催化聚合性能的研究.
  • Supported by:

    National Natural Science Foundation of China

PDF (PC)

被引次数

5

摘要： 研究了二茂基二价钐配合物(C5H5)2Sm(THF)作为单组分催化剂催化己内脂开环聚合反应，考察了催化剂用量、聚合反应时间、聚合反应温度对己内酯聚合反应的影响。结果表明，配合物(C5H5)2Sm(THF)对己内酯聚合有极高的催化活性且产物的数均分子量较高，当催化剂与单体摩尔比为1：5000时，聚合产率仍可达50.3%，数均分子量可高达32.4万；温度升高，聚合反应的转化率增加，聚合产物数均分子量降低；催化剂用量增加，聚合转化率增加，聚合产物分子量降低；聚合产物的分子量分布较窄；通过凝胶色谱法对聚合产物的分子量及分子量分布进行了表征。

关键词: 钐, 稀土配合物, 己内酯, 开环聚合

Abstract: Lanthanide (II) complex (C5H5)2Sm(THF) applied in catalyzing the polymerization of ε-caprolactone was investigated. The results indicated that the complex as single component catalyst showed very high activity and the number-average molecular weight of the polymer gained was also very high. For example, when the molar ratio of catalyst to monomer was 1/5000, the conversion could still reach 50.3% and the number-average molecular weight of the polymer gained was as high as 32.4?104. The conversion of the polymerization and the number-average molecular weight of the polymers were affected by temperature, time of polymerization and use level of catalyst in polymerization process. The number-average molecular weight of the polymer decreased, the molecular weight distribution was slightly wide, but the conversion increased as the polymerization temperature increasing. The conversion increased and the number-average molecular weight decreased as the dosage of catalyst increased. The molecular weight distribution of polycaprolactones gained were narrow. The number-average molecular weight and molecular weight distribution of polycaprolactone were measured by GPC.

Key words: Samarium, Lanthanide complex, ε-Caprolactone, Ring-opening polymerization

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