Study on Hydrogen Sensitivity of Ziegler⁻Natta Catalysts with Novel Cycloalkoxy Silane Compounds as External Electron Donor

Hongming Li; Jing Wang; Lei He; Feng Nan; Fan Wang; Wantai Yang; Mingge Zhang; Tianxu Sun; Qigu Huang; Jianjun Yi

doi:10.3390/polym8120433

Study on Hydrogen Sensitivity of Ziegler⁻Natta Catalysts with Novel Cycloalkoxy Silane Compounds as External Electron Donor

Polymers (Basel). 2016 Dec 16;8(12):433. doi: 10.3390/polym8120433.

Authors

Hongming Li^{1

2}, Jing Wang³, Lei He⁴, Feng Nan⁵, Fan Wang⁶, Wantai Yang⁷, Mingge Zhang⁸, Tianxu Sun⁹, Qigu Huang¹⁰, Jianjun Yi¹¹

Affiliations

¹ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. lihongming010@petrochina.com.cn.
² Petrochemical Research Institute, PetroChina, Beijing 102206, China. lihongming010@petrochina.com.cn.
³ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. wangjing9917@126.com.
⁴ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. helei8818@163.com.
⁵ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. 2015200325@mail.buct.edu.cn.
⁶ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. wangf2011@lzu.edu.cn.
⁷ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. yangwt@mail.buct.edu.cn.
⁸ Petrochemical Research Institute, PetroChina, Beijing 102206, China. zhangmingge@petrochina.com.cn.
⁹ Petrochemical Research Institute, PetroChina, Beijing 102206, China. suntianxu@petrochina.com.cn.
¹⁰ State Key Laboratory of Chemical Resource Engineering, Key Laboratory of Carbon Fiber and Functional Polymers, Ministry of Education, the College of Material Science and Engineering, Beijing University of Chemical Technology, Beijing 100029, China. huangqg@mail.buct.edu.cn.
¹¹ Petrochemical Research Institute, PetroChina, Beijing 102206, China. yijianjun@petrochina.com.cn.

Abstract

Two novel cycloalkoxy silane compounds (ED1 and ED2) were synthesized and used as the external electron donors (EEDs) in Ziegler⁻Natta catalysts with diethyl 2,3-diisopropylsuccinate as internal electron donor. The results indicated that the Ziegler⁻Natta catalysts using ED1 and ED2 as EEDs had high catalytic activities and good stereoselectivities. The melt flow rate (MFR) and gel permeation chromatography (GPC) results revealed that the obtained polypropylene has higher MFR and lower average molecular weights than the commercial EED cyclohexyl methyl dimethoxysilane. The differential scanning calorimetry (DSC) results indicated that new isospecific active centers formed after the introduction of new external donors. The work implied that the novel EEDs could improve the hydrogen sensitivities of the catalyst system and obtain polymers with high melt flow rate.

Keywords: Ziegler–Natta catalyst; external electron donor; high melt flow rate polypropylene; isotactic polypropylene.

Abstract

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