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- W2012199400 abstract "Abstract The copolymerization of ethylene (E) and norbornene (N) was carried out with ansa -metallocenes such as rac -Et(Ind) 2 ZrCl 2 (1) and iPr(CpFlu) 2 ZrCl 2 ( 2 ) cocatalyzed by modified methylaluminoxane in the presence of a 3 rd monomer. As 3 rd monomers, not only ɑ-olefins but also vinyl monomers were used. With the addition of a small amount of 3 rd monomer, the catalyst activity of 1 and 2 could increase depending on the structure and amount of 3 rd monomer added. The glass transition temperature ( T g ) of polymer obtained in the presence of a 3 rd monomer was higher than that of E/N copolymer. By using an appropriate mixed medium, the catalyst activity and T g of the polymer could be adjusted. With 13 C NMR analysis, it was found that the incorporation of N in the polymer was enhanced by the addition of 3rd monomer. The 3 rd monomer effect was also observed for the copolymerization system of E and 5-ethylidene-2-norbornene." @default.
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- W2012199400 date "2001-12-01" @default.
- W2012199400 modified "2023-09-26" @default.
- W2012199400 title "Improvement of catalytic activity and comonomer response in ethylene/norbornene copolymerization initiated with ansa-metallocene" @default.
- W2012199400 doi "https://doi.org/10.1515/epoly.2001.1.1.179" @default.
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