Vinylic polymerization of norbornene by neutral nickel(II)-based catalysts
Data(s) |
2002
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Resumo |
Neutral Ni(II) salicylaldiminato complexes activated with modified methylaluminoxane as catalysts were used for the vinylic polymerization of norbornene. Catalyst activities of up to 7.08 x 10(4) kg(pol)/(mol(Ni) (.) h) and viscosity-average molecular weights of polymer up to 1.5 x 10(6) g/mol were observed at optimum conditions. Polynorbornenes are amorphous, soluble in organic solvents, highly stable, and show glass-transition temperatures around 390 degreesC. Catalyst activity, polymer yield, and polymer molecular weight can be controlled over a wide range by the variation of the reaction parameters such as the Al/Ni ratio, monomer/catalyst ratio, monomer concentration, polymerization reaction temperature, and time. |
Identificador | |
Idioma(s) |
英语 |
Fonte |
Li XF;Li YS.Vinylic polymerization of norbornene by neutral nickel(II)-based catalysts,JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY,2002,40(15):2680-2685 |
Palavras-Chave | #ALUMINOXANE CATALYSTS #COPOLYMERIZATION #ETHYLENE #LIGANDS #ETHENE #BICYCLO<2.2.1>HEPT-2-ENE #HOMOPOLYMERIZATION #POLYNORBORNENE #POLYMERS |
Tipo |
期刊论文 |