Results 61 to 70 of about 5,506 (175)
Polímeros, 1998 Este trabalho apresenta uma discussão sobre aspectos gerais da nova tecnologia de síntese de polímeros com microestrutura e propriedades controladas, obtidos via sistema catalítico metaloceno/MAO.
Maria de Fátima V. Marques +3 more
doaj +1 more source
Molecules, 2021 Homogeneous olefin polymerization catalysts are activated in situ with a co-catalyst ([PhN(Me)2-H]+[B(C6F5)4]− or [Ph3C]+[B(C6F5)4]−) in bulk polymerization media. These co-catalysts are insoluble in hydrocarbon solvents, requiring excess co-catalyst (>3
Hyun-Ju Lee +7 more
doaj +1 more source
Polymer Engineering &Science, Volume 66, Issue 5, Page 3100-3141, May 2026.This review integrates the molecular fundamentals, key challenges, and mitigation strategies in polyolefin 3D printing, focusing on shrinkage, warpage, and adhesion control. It highlights material design approaches using recycled polyolefins and functional fillers to improve printability, mechanical properties, and sustainability in additive ...
Malik Hassan +5 more
wiley +1 more source
Beneficial influence of nanocarbon on the aryliminopyridylnickel chloride catalyzed ethylene polymerization [PDF]
, 2013 A series of 1-aryliminoethylpyridine ligands (L1―L3) was synthesized by condensation of 2-acetylpyridine with 1-aminonaphthalene, 2-aminoanthracene or 1-aminopyrene, respectively.
Durand, Jérôme +6 more
core +4 more sources
Chemistry – A European Journal, Volume 32, Issue 14, 15 April 2026.A copper‐catalyzed three‐component radical cascade of 1,5‐enynes with toluene and benzoic acids enables regioselective benzyl radical addition to multi‐Π systems, efficiently delivering polysubstituted indenes from an abundant solvent feedstock. ABSTRACT C─H activation of toluene generates a benzyl radical that undergoes C─C coupling, converting an ...
Saideh Rajai‐Daryasarei +7 more
wiley +1 more source
Comparative NMR study on the reactions of Hf(IV) organometallic complexes with Al/Zn alkyls [PDF]
, 2016 NMR spectroscopy has been exploited to investigate the reactions of Hf(IV) organometallic complexes with trialkylaluminum and dialkylzinc, with the aim of obtaining insights into the elementary steps of coordinative chain transfer polymerization (CCTP ...
Busico, Vincenzo +3 more
core +2 more sources
ChemCatChem, Volume 18, Issue 7, 14 April 2026.This review maps how electroenzymatic cascades that couple nitrogen‐cycle enzymes with C─N bond forming auxilary enzymes, powered by direct electron transfer (DET) or mediated electron transfer (MET), can upgrade N2 and waste nitrogen streams into value‐added amines, amides, amino acids, and other nitrogen‐based chemicals.
Rohit G. Jadhav +4 more
wiley +1 more source
Six-coordinated half-metallocene catalyst for ethylene polymerization and its mechanism study
GiantThe demand for catalysts capable of enabling olefin polymerization at elevated temperatures to meet industrial requirements continues to grow. Among emerging candidates, novel six-coordinated half-metallocene catalysts, which combine the advantages of ...
Qian Li +10 more
doaj +1 more source
The ethene polymerisation behaviour of zirconium metallocenes: A steric and electronic investigation into the influence of substituent effects [PDF]
, 2006 PhD - Biochemistry There are 9 files which have been withheld at the author's requestA systematic investigation into the effect that alkyl and aryl substituents have on the ethene polymerisation behaviour of a series of MAO co-catalysed mono ...
Grimmer, Neil Eugene
core
Isotactic and syndiotactic alternating ethylene/propylene copolymers obtained through non-catalytic hydrogenation of highly stereoregular cis-1,4 poly(1,3-diene)s [PDF]
, 2017 The homogeneous non-catalytic hydrogenation of cis-1,4 poly(isoprene), isotactic cis-1,4 poly(1,3-pentadiene) and syndiotactic cis-1,4 poly(1,3-pentadiene) with diimide, formed by thermal decomposition of para-toluenesulfonylhydrazide, is examined ...
Auriemma, Finizia +7 more
core +1 more source