Results 51 to 60 of about 5,159 (225)
Molecules, 2011 This research aimed to investigate the copolymerization of ethylene and various 1-olefins. The comonomer lengths were varied from 1-hexene (1-C6) up to 1-octadecene (1-C18) in order to study the effect of comonomer chain length on the activity and ...
Mingkwan Wannaborworn +2 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
Molecules, 2005 Activities during ethylene/1-hexene copolymerization were found to increaseusing the mixed titania/silica-supported MAO with rac-Et[Ind]2ZrCl2 metallocenecatalyst. Energy Dispersive X-ray spectorcopy (EDX) indicated that the titania wasapparently located
P. Praserthdam +2 more
doaj +1 more source
Redox-mediated reactions of vinylferrocene: Toward redox auxiliaries [PDF]
, 2016 Chemical redox reactions have been exploited to transform unreactive vinylferrocene into a powerful dienophile for the Diels–Alder reaction and reactive substrate for thiol addition reactions upon conversion to its ferrocenium state.
Cooke, Graeme +5 more
core +1 more source
Complex Macromolecular Architectures Utilizing Metallocene Catalysts
Macromolecules, 2003 Graft copolymers having poly(methyl methacrylate), PMMA, backbone and polystyrene, PS, polyisoprene, PI, poly(ethylene oxide), PEO, poly(2-methyl-1,3-pentadiene), P2MP, and PS-b-PI branches were prepared using the macromonomer methodology and high-vacuum techniques. The methacrylic macromonomers, mMM, were synthesized by anionic polymerization, whereas
Batis, C. +3 more
openaire +2 more sources
Polyolefin Synthesis by Metallocene Catalysts.
Kobunshi, 1993 メタロセン触媒は,ポリオレフィンの世界を変革する技術として注目を集めている.ここでは,メタロセン触媒によるポリプロピレン,ポリエチレン,ポリスチレン等のポリオレフィンの高性能化,シクロオレフィン,ジエン,極性モノマーを使った新規ポリオレフィン開発の可能性について紹介する.
Toshio Sasaki, Hirofumi Johoji
openaire +2 more sources
Unveiling the Role of Curvature in Carbon for Improved Energy Release of Ammonium Perchlorate
Advanced Materials, EarlyView.High‐curvature carbon materials identified via machine learning and simulation can enhance the heat release and combustion performance of ammonium perchlorate. ABSTRACT The catalytic role of carbon curvature in the thermal decomposition of ammonium perchlorate (AP) remains largely unexplored. To address this gap, this study employs machine learning and
Dan Liu +8 more
wiley +1 more source
Kinetic resolution of racemic {alpha}-olefins with ansa-zirconocene polymerization catalysts: Enantiomorphic site vs. chain end control [PDF]
, 2006 Copolymerization of racemic {alpha}-olefins with ethylene and propylene was carried out in the presence of enantiopure C1-symmetric ansa metallocene, {1,2-(SiMe2)2({eta}5-C5H-3,5-(CHMe2)2)({eta}5-C5H3)}ZrCl2 to probe the effect of the polymer chain end ...
Bercaw, John E., Byers, Jeffery A.
core +1 more source
UHMWPE/HDPE in-reactor blends, prepared by in situ polymerization: synthetic aspects and characterization [PDF]
, 2017 This work covers the synthesis and characterization of in-reactor Ultra-High Molecular Weight Polyethylene/ High Density Polyethylene, UHMWPE/HDPE, blends by in situ polymerization in a single reactor, through dual catalyst immobilization. These blends
Cerrada, M. L. +8 more
core +4 more sources
Developments of Chiral Metallocenes as Polymerization Catalysts [PDF]
Molecules, 2005 This review article describes developments in chiral metallocenes as polymerization catalysts focusing on C2 symmetric ansa-zirconocene complexes. Selective synthesis of rac-isomers of ansa-zirconocenes are surveyed. Isospecific polymerizations of propylene catalyzed by chiral zirconocenes are summarized.
Yuushou Nakayama, Takeshi Shiono
openaire +3 more sources