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
core +1 more source
Testing DFT ability to predict the stereoselectivity of group 4 metallocenes in propylene polymerization [PDF]
Polyolefins Journal, 2014 In this study we have tested the ability of a standard DFT computational protocol to reproduce the experimentally obtained stereoselectivity of 26 different C2-symmetric zirconocene catalysts active in propylene polymerization.
Naeimeh bahri-Laleh +2 more
doaj +1 more source
Polímeros, 1997 Recentes inovações tecnológicas no setor de polímeros levaram a novos catalisadores que poderão mudar a estrutura de toda a indústria. É feita uma análise das estratégias competitivas adotadas pelas empresas do setor e do impacto que a adoção dos ...
Francisco A. Ribeiro Fº +2 more
doaj +1 more source
Half-titanocene 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate chlorides: Synthesis, characterization and ethylene (co-) polymerization behavior [PDF]
, 2013 A series of half-titanocene chloride complexes bearing 5-t-butyl-2-(1-(arylimino)methyl)quinolin-8-olate ligands (L), CpTiLCl₂, has been synthesized in acceptable yields by the stoichiometric reaction of CpTiCl₃ with the respective potassium 5-t-butyl-2-(
Chen, Langqiu +5 more
core +1 more source
Química Nova, 2011 The inadequacy of strategies used for the heterogeneization of metallocene catalysts is pointed out as one of the main causes of the lack of industrial employability of such polymerization catalysts.
Adriano G. Fisch +3 more
doaj +1 more source
Modification of ethylene-norbornene copolymer by Gamma irradiation [PDF]
Hemijska Industrija, 2006 The possibility of modifying polyethylene and many other polymers with high energy radiation has led to many useful applications. Due to their new combination of properties and the shortage of experimental data, the radiolysis of a new class of materials,
Kačarević-Popović Zorica M. +4 more
doaj +1 more source
Gas phase polymerization of ethylene with a silica-supported metallocene catalyst: influence of temperature on deactivation [PDF]
, 1997 Ethylene was polymerized at 5 bar in a stirred powder bed reactor with silica supported rac-Me2Si[Ind]2ZrCl2/methylaluminoxane (MAO) at temperatures between 40°C and 80°C using NaCl as support bed and triethylaluminium (TEA) as a scavenger for impurities.
Meier, G.B. +5 more
core +2 more sources
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
Polímeros, 2001 O monômero eteno foi polimerizado através dos sistemas catalíticos Cp2ZrCl2/SiO2 e Cp2ZrCl2/MAO/SiO2. Foi elaborado um planejamento estatístico de experimentos a fim de se identificar as melhores condições de preparo dos catalisadores heterogêneos.
Anunciata Conte +1 more
doaj +1 more source
Morphology control of clay-mineral particles as supports for metallocene catalysts in propylene polymerization [PDF]
Polyolefins Journal, 2016 Spray dry granulation of clay minerals was studied to obtain clay mineral base support material for metallocene supported olefin polymerization catalysts.
Takao Tayano +5 more
doaj +1 more source