cis-1,4 Selective Coordination Polymerization of 1,3-Butadiene and Copolymerization with Polar 2-(4-Methoxyphenyl)-1,3-butadiene by Acenaphthene-Based α-Diimine Cobalt Complexes Featuring Intra-Ligand π-π Stacking Interactions.

cis-1,4 Selective Coordination Polymerization of 1,3-Butadiene and Copolymerization with Polar 2-(4-Methoxyphenyl)-1,3-butadiene by Acenaphthene-Based α-Diimine Cobalt Complexes Featuring Intra-Ligand π-π Stacking Interactions.
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1,3-丁二烯的 cis-1,4 选择性配位聚合以及具有配体内配位体的苊基 α-二亚胺钴配合物与极性 2-(4-甲氧基苯基)-1,3-丁二烯的共聚

DOI:
10.3390/polym13193329
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发表时间:
2021-09-29
期刊:
影响因子:
5
通讯作者:
Zhang X
Zhang X
中科院分区:
工程技术3区
文献类型:
--
作者:
Wang B;Liu H;Tang T;Zhang X

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1,3-丁二烯(BD)的1,3-丁二烯(BD)的1,3-丁二烯(BD)的高度顺式-1,4选择性(高达98%)的配位-插入聚合反应,是使用基于吖基的α-二亚胺钴配合物实现的。由于配体内π-π堆积作用的存在,配合物表现出很高的热稳定性,提供了高产率的聚丁二烯产品。此外,所有得到的聚合物都具有较窄的相对分子质量分布以及较高的相对分子质量(最高可达92.2×104道尔顿)。所合成的聚丁二烯的相对分子质量可以通过改变聚合温度、Al/Co比等参数进行微调,并成功地实现了丁二烯与极性单体2-(4-甲氧基苯基)-1,3-丁二烯(2-MOPB)的共聚,得到了顺式-1,4-聚丁二烯(顺-1,4含量高达98.1%),2-MOPB含量范围为0.46-1.83%。水接触角测量表明,将极性单体插入到聚合物链中可以显著改善聚合物的表面性质。
Highly cis-1,4 selective (up to 98%) coordination–insertion polymerization of 1,3-butadiene (BD) has been achieved herein using acenaphthene-based α-diimine cobalt complexes. Due to the presence of intra-ligand π-π stacking interactions, the complexes revealed high thermostability, affording polybutadiene products in high yields. Moreover, all of the obtained polymers possessed a relatively narrow molecular weight distribution as well as high molecular weight (up to 92.2 × 104 Dalton). The molecular weights of the resultant polybutadienes could be finely tuned by varying polymerization parameters, including temperature, Al/Co ratio, etc. Moreover, the copolymerization of butadiene with polar monomer 2-(4-methoxyphenyl)-1,3-butadiene (2-MOPB) was also successfully realized to produce a type of polar cis-1,4 polybutadiene (cis-1,4 content: up to 98.1%) with a range of 2-MOPB content (0.46–1.83%). Water contact angle measurements indicated that the insertion of a polar monomer into a polymer chain could significantly improve the polymer’s surface property.
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通过配体内氢键的构建和同时增加轴向/赤道体积来提高降冰片烯聚合中α-二亚胺钯配合物的热稳定性
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