Enhancing stereoselectivity of propylene polymerization with MgCl2-supported Ziegler-Natta catalysts by electron donor: Strong effects of titanium dispersion state
Sign Up to like & getrecommendations! Published in 2019 at "Catalysis Communications"
DOI: 10.1016/j.catcom.2018.12.008
Abstract: Abstract Propylene polymerization with two TiCl4/MgCl2 catalysts (Cat-1: Ti 0.1%; Cat-2: Ti 1.0%) showed different responses to (cyclo-C5H9)2Si(OCH3)2 (De) addition. Cat-1 was deactivated more than Cat-2 by De. Amount of three groups of active centers… read more here.
Keywords: cat; mgcl2; propylene polymerization; enhancing stereoselectivity ... See more keywords
Industrial Adaptability of the Ziegler–Natta Catalyst-Friendly Synthesis of Long-Chain-Branched Polypropylene Based on ω-Alkenylmethyldichlorosilane-Assisted Propylene Polymerization
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DOI: 10.1021/acs.iecr.1c00190
Abstract: ω-Alkenylmethyldichlorosilane-assisted propylene polymerization for the synthesis of long-chain-branched polypropylene (LCB-PP) was applied in a liquid bulk polymerization process to verify its ind... read more here.
Keywords: assisted propylene; propylene polymerization; alkenylmethyldichlorosilane assisted; synthesis long ... See more keywords
Substituent Effects on Propylene Polymerization in Cyclic Bis(phenoxyaldimine) Titanium Catalysts
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DOI: 10.1021/acs.macromol.0c01981
Abstract: To better understand the substituent effect of cyclic catalysts on propylene polymerization, a series of cyclic bis(phenoxyimine) titanium catalysts bearing different size substituents at the ortho... read more here.
Keywords: titanium catalysts; propylene polymerization; cyclic bis;
Multisubstituted C2-symmetric ansa-metallocenes bearing nitrogen heterocycles: influence of substituents on catalytic properties in propylene polymerization at higher temperatures.
Sign Up to like & getrecommendations! Published in 2021 at "Dalton transactions"
DOI: 10.1039/d1dt00645b
Abstract: In this work we systematically studied the effects of modifications of substituents on the performance of the isospecific zirconocene-based catalyst family, Me2Si(2-Alk-4-(N-carbazolyl)Ind)ZrX2 (X = Cl, Me), wherein the progenitor was shown to be particularly suitable… read more here.
Keywords: ansa metallocenes; polymerization; metallocenes bearing; symmetric ansa ... See more keywords
Preparation of MgCl2-Supported Ziegler-Natta Catalysts via New Surfactants Emulsion for Propylene Polymerization
Sign Up to like & getrecommendations! Published in 2021 at "Catalysts"
DOI: 10.3390/catal11050601
Abstract: This article describes a MgCl2-supported Ziegler-Natta catalyst for propylene polymerization prepared via an in situ emulsion technique with new surfactants. The effect of preparation conditions such as the TiCl4/toluene molar ratio, TiCl4-contacting temperature, amount of… read more here.
Keywords: ziegler natta; propylene polymerization; catalyst; mgcl2 supported ... See more keywords