MgCl2-Supported TiCl4 Catalysts Containing Diethyl Norbornene-2,3-dicarboxylate Internal Electron Donor for 1-Butene Polymerization
作者：Xiaofang Dong,1 Li Zhang,Zhibo Liu, Min Yang, Zhongyu Duan, Kaihu Hou, Binyuan Liu, IL Kim
關鍵字：Ziegler–Natta polymerization,polybutene
論文來源：期刊
具體來源：J Appl Polym Sci, DOI: 10.1002/app.40758
發表時間：2014年
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-norborneneendo- 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 MgCl2, subsequently affecting the catalysts performance.