Results 31 to 40 of about 902,813 (269)
Monomer effect on the chain transfer by diethyl zinc in olefin polymerization by metallocene catalysts [PDF]
Polyolefins Journal, 2021 The present paper systematically studies the homo- and copolymerization of ethylene or propylene using metallocene as catalyst and diethyl zinc as chain transfer agent to obtain the polyolefin waxes with narrow molecular weight distribution and with a ...
Wei Wang, Taoyi Zhang, Liping Hou
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Silicoaluminates as “support activator” systems in olefin polymerization processes [PDF]
, 2010 In this work we report the polymerization behaviour of natural clays (montmorillonites, MMT) as activating supports. These materials have been modified by treatment with different aluminium compounds in order to obtain enriched aluminium clays and to ...
Alba Carranza, María Dolores +4 more
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Modeling of synthesis and flow properties of propylene-diene copolymers [PDF]
, 2014 Copolymerization with nonconjugated dienes offers an attractive route for introducing long-chain branching in polypropylene. From a simplified set of rate equations for such copolymerization with a metallocene catalyst, we derive the probabilities of ...
Das, C +3 more
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Polímeros, 2003 The intermolecular defect distribution of poly(propylenes) of the Ziegler-Natta (ZN) and metallocene (M) types is assessed by classical fractionation and analysis of the fractions by GPC and 13C NMR.
Rufina G. Alamo
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Molecules, 2011 We describe the synthesis of [bis(N-(3-tert-butylsalicylidene)anilinato)] titanium (IV) dichloride (Ti-FI complex) and examine the effects of comonomer (feed concentration and type) on its catalytic performance and properties of the resulting polymers ...
Patcharaporn Kaivalchatchawal +4 more
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Enantioselective synthesis and application to the allylic imidate rearrangement of amine-coordinated palladacycle catalysts of cobalt sandwich complexes [PDF]
, 2013 The reaction of (η5-(N,N-dimethylaminomethyl)cyclopentadien-yl)(η4-tetraphenylcyclobutadiene)cobalt with sodium tetrachloropalladate and (R)-N-acetylphenylalanine gave planar chiral palladacycle di-μ-chloridebis[(η5-(Sp)-2-(N,N-dimethylaminomethyl ...
Cassar, Doyle J. +5 more
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Kinetic Analysis and Optimization of Long Chain Branched Propylene Polymerization System [PDF]
, 2014 A kinetic model has been proposed for a binary catalyst system with the available experimental data from the open literature, in which one catalyst produces polypropylene macromonomer, while the other catalyst attacks the macromonomers as side chains ...
Majumdar, S +2 more
core +2 more sources
Advances in Materials Science and Engineering, 2018 The influence of multiwalled carbon nanotubes (MWCNTs) on the properties of polyethylene prepared by in situ polymerization using metallocene catalyst (Cp2ZrCl2) in combination with methylaluminoxane has been studied.
Mamdouh A. Al-Harthi +1 more
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Innovative catalytic systems driving sustainable olefin polymerization: Recent advances and green chemistry approaches [PDF]
Polyolefins JournalThis mini-review addresses the burgeoning requirements for environmentally friendly processes in the polymer industry, focusing on recent progress in developing catalytic systems for sustainable olefin polymerization.
Farabi Hossain, Md Enamul Hoque
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Modeling and Optimization of propylene polymerization with branching [PDF]
, 2014 A kinetic model has been proposed to fit the experimental data (2003) available from the open literature for branched propylene polymerization system. The present system considered is a binary catalyst system, in which the first catalyst produces the ...
Majumdar, S +2 more
core +2 more sources