论文成果
Ni(acac)_2 Mediated Vinyl Polymerization of Norbornene in the Presence of Bulky Salicylaldiminate Ligands:An Effective Strategy to Access Soluble Polynorbornenes
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摘要:Late transition metals have long served as workhorses for vinyl polymerization of norbornene derivatives. Nevertheless, for such catalytic systems, insoluble polynorbornene(PNB) products are often produced which hampers their further detailed characterizations, such as molecular weights, polydispersities, stereoregularities, etc. In this work, we surprisingly found that for a traditional Ni(acac)_2/MAO system that was previously reported to give insoluble PNBs, incorporation of highly bulk salicylaldiminate ligands could significantly improve the solubility of the PNBs in common organic solvents, which allowed for subsequent thorough detailed analysis of the polymer products. Moreover, it was also observed that high-temperature polymerization was beneficial for further improving the PNB's solubilities due to the decreased molecular weights and stereoregularities. Different ligand skeletons and ligand equivalents were also investigated to give a comprehensive view of their influences on the polymers' solubilities, and based on these results, a plausible mechanism that caused such a big difference was tentatively proposed.
卷号:v.41
期号:03
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张春雨

教授 博士生导师 硕士生导师

教师拼音名称:zhangchunyu

出生日期:1978-11-30

电子邮箱:

入职时间:2019-11-28

所在单位:先进橡胶材料教育部重点实验室

学历:博士研究生

办公地点:国家大学科技园北楼702 CCF大楼1517室

性别:男

联系方式:13844852208

学位:理学博士

毕业院校:吉林大学

所属院系:先进橡胶材料教育部重点实验室

学科:材料科学与工程其他专业
高分子化学与物理

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