Gradient Modulation of Ansa‐Metallocenes for Syndiotactic Propylene Polymerization: Multi‐Stage Remote Substituent Effects
Sign Up to like & getrecommendations! Published in 2025 at "Macromolecular Rapid Communications"
DOI: 10.1002/marc.202500382
Abstract: The production of economical and sustainable thermoplastic all‐polyolefin composites has been a grand challenge in polymer chemistry. Polypropylene ranks at the top in the life cycle assessment but generally needs alien materials or modifications to… read more here.
Keywords: gradient modulation; propylene polymerization; polymerization; ansa ... See more keywords
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
Sign Up to like & getrecommendations! Published in 2021 at "Industrial & Engineering Chemistry Research"
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
Sign Up to like & getrecommendations! Published in 2020 at "Macromolecules"
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
Synthesis of High-Molecular-Weight Polypropylene Elastomer by Propylene Polymerization Using α-Diimine Nickel Catalysts
Sign Up to like & getrecommendations! Published in 2024 at "Polymers"
DOI: 10.3390/polym16162376
Abstract: The α-diimine late transition metal catalyst represents a new strategy for the synthesis of atactic polypropylene elastomer. Taking into account the properties of the material, enhancing the molecular weight of polypropylene at an elevated temperature… read more here.
Keywords: propylene polymerization; polypropylene elastomer; polypropylene; molecular weight ... See more keywords