Abstract
MgCl2-supported titanium Ziegler-Natta catalyst containing CO2-based poly(propylene ether carbonate) diols as a potential internal electron donor (IED) was synthesized and employed for 1-butene polymerization. When compared with the Ziegler-Natta catalyst using poly(polypropylene glycol) as IED, the catalyst prepared with poly(propylene ether carbonate) diols showed good particle morphology, higher activity and stereoselectivity. The results suggested that existence of the carbonate group within the structure of poly(propylene ether carbonate) diols truly plays an important role in improving the performance of the catalyst for the 1-butene polymerization.
Highlights
Isotactic poly(1-butene) (PB) is one of the polyolefin materials with outstanding physical and mechanical properties, such as high-temperature creep resistance, environmental stress cracking resistance, excellent elastic recovery, and good resistance to chemical corrosion
Industry is still the traditional heterogeneous Ziegler-Natta catalyst that is assisted by alkylaluminium, especially the fourth-generation Ziegler-Natta catalyst, which is prepared by embedding TiCl4 on
It is well known that internal electron donor (IED) play an important role in tuning the performance of catalysts and the properties of corresponding polymers [4,5,6], including the activity, isotacticity index, molecular weight (MW), molecular weight distribution (MWD) [7,8,9], and hydrogen response of the catalysts [10]
Summary
Isotactic poly(1-butene) (PB) is one of the polyolefin materials with outstanding physical and mechanical properties, such as high-temperature creep resistance, environmental stress cracking resistance, excellent elastic recovery, and good resistance to chemical corrosion. The preparation of PB materials is one of the important ways to balance the problem of the excess 1-butene resources [2]. MgCl2 support with diisobutylphthalate (DIBP) as potential internal electron donor (IED) [3]. It is well known that IEDs play an important role in tuning the performance of catalysts and the properties of corresponding polymers [4,5,6], including the activity, isotacticity index, molecular weight (MW), molecular weight distribution (MWD) [7,8,9], and hydrogen response of the catalysts [10]. It is of great significance to explore potential IED with novel structure and functions for MgCl2 -supported titanium Ziegler-Natta catalyst
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