MgCl 2 ‐supported TiCl 4 catalysts containing diethyl norbornene‐2,3‐dicarboxylate internal electron donor for 1‐butene polymerization: Effects of internal electron donor configuration

ABSTRACT Three isomeric 5‐norbornene‐2,3‐dicarboxylic acid diethyl ester (NDDE) with endo ‐, exo ‐, and trans ‐configuration have been synthesized and employed as internal electron donors (IED) in 1‐butene polymerization over magnesium chloride supported Ziegler–Natta catalysts. It was found that th...

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Published in:Journal of applied polymer science 2014-09, Vol.131 (18)
Main Authors: Dong, Xiaofang, Zhang, Li, Liu, Zhibo, Yang, Min, Duan, Zhongyu, Hou, Kaihu, Liu, Binyuan, Kim, IL
Format: Article
Language:English
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Summary:ABSTRACT Three isomeric 5‐norbornene‐2,3‐dicarboxylic acid diethyl ester (NDDE) with endo ‐, exo ‐, and trans ‐configuration have been synthesized and employed as internal electron donors (IED) in 1‐butene polymerization over magnesium chloride supported Ziegler–Natta catalysts. It was found that the configuration of NDDE plays a key role in tuning the catalyst activity, stereospecificity, molecular weight (MW), and polydispersity index (PDI) of resulting poly(1‐butene). The type of catalyst with cis ‐5‐norbornene‐ endo ‐2,3‐dicarboxylic acid diethyl ester as IED shows the highest catalyst activity, while catalyst with trans ‐NDDE as IED yields the poly(1‐butene) with the highest MW and the most broad PDI. IR results showed that the NDDE with endo ‐, exo ‐, and trans ‐configuration have different coordination way to MgCl 2 , subsequently affecting the catalysts performance. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 40758.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.40758