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Synthesis of pyrrole-bridged constrained geometry complexes and their application for olefin polymerization

机译:吡咯 - 桥接约束几何复合物的合成及其对烯烃聚合的应用

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摘要

In this article, four constrained geometry complexes 4a [(eta(5)-C5H4)CH2(alpha-C4H3N)]Ti(NMe2)(2), 7a [(eta(5)-C9H6)CH2(alpha-C4H3N)]Ti(NMe2)(2), 4b [(eta(5)-C5H4)CH2(alpha-C4H3N)]Zr(NEt2)(2), 7b [(eta(5)-C9H6)CH2(alpha-C4H3N)]Zr(NEt2)(2) with pyrrole-bridged fragment were synthesized and characterized by H-1 NMR, C-13 NMR, MASS, and EA. When combined with MAO, complex 4b given the highest activity, the activity of copolymerizing ethylene and 1-hexene reached 2.48 x 10(6) g polymer/mol center dot M center dot h. The effects of temperature, pressure, and ratio of Al/Metal on the polymerization reaction and properties of polymers had been investigated. The polymers with these complexes were characterized by C-13 NMR and DSC, and the results shown that polymer with 4a had the highest alpha-olefin incorporation, the incorporation of 1-hexene reached up to 9.81 mol%, and the 1-octene was 8.84 mol%. Actually, there was no [HH] or [OO] sequence in the copolymer, according to the formula of reactivity ratio, rE center dot rH = 0, all these results suggested that the copolymerization mode is alternating copolymerization. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48620.
机译:在本文中,四个受约束的几何络合物4a [(eta(5)-c5h4)ch 2(α-c4h3n)] ti(nme2)(2),7a [(eta(5)-c9h6)ch 2(alpha-c4h3n)] Ti(NME2)(2),4B [(ETA(5)-C5H4)CH2(α-C4H3N)] Zr(Net2)(2),7b [(Eta(5)-C9H6)CH 2(α-C4H3N)]合成吡咯 - 桥接片段的Zr(Net2)(2)由H-1 NMR,C-13 NMR,质量和EA表征。当与MAO结合时,给定最高活性的复合物4B时,共聚乙烯和1-己烯的活性达到2.48×10(6 )g聚合物/摩尔中心点M中心点H.研究了Al /金属的温度,压力和比例对聚合反应和聚合物的性质。具有这些配合物的聚合物的特征在于C-13 NMR和DSC,结果表明,具有4A的聚合物具有最高的α-烯烃掺入,1-己烯的掺入达到高达9.81摩尔%,并且1-辛烯8.84 mol%。实际上,共聚物中没有[HH]或[OO]序列,根据反应性比的公式,重新中心点RH = 0,所有这些结果表明共聚模式是交替的共聚合。 (c)2019 Wiley期刊,Inc.J.Phill。聚合物。 SCI。 2019,137,48620。

著录项

  • 来源
    《Journal of Applied Polymer Science》 |2020年第18期|共8页
  • 作者单位

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn 130 Meilong Rd Shanghai 200237 Peoples R China;

    East China Univ Sci &

    Technol Sch Chem &

    Mol Engn 130 Meilong Rd Shanghai 200237 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 高分子化合物工业(高聚物工业);
  • 关键词

    catalysts; catalysts; copolymers;

    机译:催化剂;催化剂;共聚物;

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