Results 91 to 100 of about 4,945 (173)
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
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, 2003 The past 15 years have witnessed tremendous advances in the design and use of organometallic complexes as precatalysts for olefin polymerization. Most recently, an intense search has been started in next-generation single-site catalysts. New approaches have been taken to ligand design.
openaire +1 more source
POTASSIUM SELECTIVE METALLOCENE CRYPTAND MOLECULES
, 1986 Novel metallocene cryptand molecules have been synthesized exhibiting selective complexation of K+ to the exclusion of either Li+, Na+ or Cs+.
CRANE, C, WHYMAN, A, BEER, P, KEEFE, A
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InorganicsSince the synthesis of ferrocene in 1951, metallocenes have attracted attention, making the accurate prediction of their electronic structure and ionization energy crucial for understanding their photophysical and electrochemical behavior in materials ...
Christina Eleftheria Tzeliou +2 more
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An Evaluation of Dilution Rheology for the Characterization of Long Chain Branching of Polyethylenes
Applied Rheology, 2006 The purpose of this paper was to re-evaluate the novel rheological method of Crosby et al. [J. Rheol. 46 (2002) 401] to characterise long chain branching (LCB) in polyethylenes (PE) using the rheology of concentrated solutions.
Chai Choon K., Ang Swe Chong
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Characterization of metallocene-oligonucleotide adducts with different activation techniques
, 2017 Introduction: Bent metallocenes [Cp2M]2+ (with Cp = cyclopentadienyl and derivatives) based on the transition metals Ti, V, Nb, and Mo are a promising class of antitumor compounds that are active against cisplatin sensitive or resistant cancer cell lines.
Schürch, Stefan, Eberle, Rahel Patricia
core
Advances in High-Temperature Non-Metallocene Catalysts for Polyolefin Elastomers
Despite the great successes achieved by metallocene catalysts in high-value-added polyolefin elastomer, the challenging preparation conditions and undesirable high-temperature molecular weight capabilities have compromised the efficiency and cost of ...
Cheng Wang, Xin Li, Tianyu Shan, Si Chen
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, 2019 Metallocene-based olefin polymerization catalysts often require large excesses of co-catalyst for optimal catalyst activation. In this work, mechanistic insights into the activation of supported metallocenes by methylaluminoxane as co-catalyst are ...
Sub Inorganic Chemistry and Catalysis +5 more
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Synthesis of Linear Ethylene/Divinylbenzene Copolymers by Metallocene Catalysis
, 2016 Synthesis of Linear Ethylene/Divinylbenzene Copolymers by Metallocene ...
T. C. Chung (2665975) +1 more
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