Results 91 to 100 of about 81,401 (281)
Advantages of an Emulsion‐Produced Ziegler‐Natta Catalyst Over a Conventional Ziegler‐Natta Catalyst
Macromolecular Materials and Engineering, 2005 AbstractSummary: Self‐supported and MgCl2‐supported Ziegler‐Natta catalysts, produced by two catalyst synthesis methods are compared. Borealis Polymers OY (Finland), who supplied the catalysts, developed the catalyst synthesis methods. The first method (Method One) is based on an emulsion system and consists of an in situ single step preparation.
Mohammed Abboud +2 more
openaire +1 more source
Threshold effect of residual catalyst on volume resistivity of polypropylene polymers
High Voltage, Volume 10, Issue 4, Page 939-952, August 2025.Abstract Polypropylene (PP) has become the focus of research and development of recyclable polymer dielectric materials because of its excellent electrical and thermal properties. The residual catalyst after PP polymerisation is the main part of ash. It was found that ash particles are uniformly dispersed in the PP matrix.
Xinhua Dong +11 more
wiley +1 more source
Revista Técnica de la Facultad de Ingeniería, 2011 The properties of supported Ziegler-Natta catalysts depend mostly on the preparation of the support. Four kinds of Ziegler-Natta catalysts consisting of TIC4 supported on MgCh were prepared, differting mainly by the method used to prepare the support ...
F. Medina +4 more
doaj
Tailoring polypropylene properties by package of internal/external donor in Ziegler Natta catalysts [PDF]
Polyolefins JournalInsights have been developed into the influence of different structures, including bismethoxymethylfluorene (B) and 2,2-diisopropyl succinate (I), on both internal donor (ID) and external donor (ED) roles on the performance of MgCl2/ID/TiCl4.
Nona Ghasemi Hamedani +3 more
doaj +1 more source
Heterogeneous Distribution of Entanglements in a Nonequilibrium Polymer Melt of UHMWPE: Influence on Crystallization without and with Graphene Oxide [PDF]
, 2016 In the past, studies have been performed to follow chain dynamics in an equilibrium polymer melt using low molar mass polymers. Here we show that in linear ultrahigh molecular weight polyethylene entanglements formed during or after polymerization are ...
Dario Romano +6 more
core +4 more sources
ANALYSIS OF MOLECULAR CHARACTERISTICS OF THE ISOPRENE POLYMERIZATION PRODUCT ON A ZIEGLER-NATTA TITANIUM CATALYST BY MATHEMATICAL MODELING [PDF]
, 2020 Eldar Miftakhov +2 more
openalex +1 more source
Polímeros, 2014 O objetivo deste trabalho foi estudar sistemas catalíticos ternários constituídos por versatato de neodímio, cloreto de t-butila e hidreto de di-isobutil-alumínio para a polimerização de 1,4-cis de butadieno em hexano.
Neusa Maria Tocchetto Pires +4 more
doaj +1 more source
Bond Length - Bond Valence Relationships for Carbon - Carbon and Carbon - Oxygen Bonds [PDF]
, 2015 In the present study, relationships are developed for determining bond orders (also referred to as bond valences or bond numbers) from published bond lengths for carbon-carbon (C-C) and carbon-oxygen (C-O) bonds.
Hardcastle, F. D., Harris, C.
core +3 more sources
Electronic Properties of Ti Sites in Ziegler–Natta Catalysts
ACS Catalysis, 2021 A. Piovano +8 more
semanticscholar +1 more source
Polímeros, 2005 Atualmente, há uma grande demanda pelo polibutadieno com alto teor de unidades 1,4-cis, devido às suas excelentes propriedades físicas, tais como alta resistência à abrasão, baixo desenvolvimento de calor, baixa resistência ao rolamento, maior ...
Denise S. S. Nunes +2 more
doaj +1 more source