Matches in SemOpenAlex for { <https://semopenalex.org/work/W3138836252> ?p ?o ?g. }
- W3138836252 endingPage "407" @default.
- W3138836252 startingPage "407" @default.
- W3138836252 abstract "The kinetics and terminations of ethylene polymerization, mediated by five bisarylimine pyridine (BIP) iron dichloride precatalysts, and activated by large amounts of methyl aluminoxane (MAO) was studied. Narrow distributed paraffins from initially formed aluminum polymeryls and broader distributed 1-polyolefins and (bimodal) mixtures, thereof, were obtained after acidic workup. The main pathway of olefin formation is beta-hydrogen transfer to ethylene. The rate of polymerization in the initial phase is inversely proportional to the co-catalyst concentration for all pre-catalysts; a first-order dependence was found on ethylene and catalyst concentrations. The inhibition by aluminum alkyls is released to some extent in a second phase, which arises after the original methyl groups are transformed into n-alkyl entities and the aluminum polymeryls partly precipitate in the toluene medium. The catalysis is interpretable in a mechanism, wherein, the relative rate of chain shuttling, beta-hydrogen transfer and insertion of ethylene are determining the outcome. Beta-hydrogen transfer enables catalyst mobility, which leads to a (degenerate) chain growth of already precipitated aluminum alkyls. Stronger Lewis acidic centers of the single site catalysts, and those with smaller ligands, are more prone to yield 1-olefins and to undergo a faster reversible alkyl exchange between aluminum and iron." @default.
- W3138836252 created "2021-03-29" @default.
- W3138836252 creator A5025198351 @default.
- W3138836252 creator A5057685586 @default.
- W3138836252 date "2021-03-23" @default.
- W3138836252 modified "2023-09-23" @default.
- W3138836252 title "Investigations on the Ethylene Polymerization with Bisarylimine Pyridine Iron (BIP) Catalysts" @default.
- W3138836252 cites W1602445732 @default.
- W3138836252 cites W1843124194 @default.
- W3138836252 cites W1848972972 @default.
- W3138836252 cites W1965983957 @default.
- W3138836252 cites W1966061406 @default.
- W3138836252 cites W1966336757 @default.
- W3138836252 cites W1968569128 @default.
- W3138836252 cites W1969570891 @default.
- W3138836252 cites W1972056545 @default.
- W3138836252 cites W1973263304 @default.
- W3138836252 cites W1978829998 @default.
- W3138836252 cites W1979541582 @default.
- W3138836252 cites W1979721822 @default.
- W3138836252 cites W1979776860 @default.
- W3138836252 cites W1985275714 @default.
- W3138836252 cites W1986267883 @default.
- W3138836252 cites W1989027918 @default.
- W3138836252 cites W1994604471 @default.
- W3138836252 cites W1995815400 @default.
- W3138836252 cites W1996843768 @default.
- W3138836252 cites W1997182737 @default.
- W3138836252 cites W2001619665 @default.
- W3138836252 cites W2002935022 @default.
- W3138836252 cites W2003162132 @default.
- W3138836252 cites W2005919018 @default.
- W3138836252 cites W2008964226 @default.
- W3138836252 cites W2013464543 @default.
- W3138836252 cites W2018215249 @default.
- W3138836252 cites W2021468188 @default.
- W3138836252 cites W2021911875 @default.
- W3138836252 cites W2022230793 @default.
- W3138836252 cites W2025177757 @default.
- W3138836252 cites W2026492406 @default.
- W3138836252 cites W2027335684 @default.
- W3138836252 cites W2032090479 @default.
- W3138836252 cites W2033340431 @default.
- W3138836252 cites W2038578435 @default.
- W3138836252 cites W2039410044 @default.
- W3138836252 cites W2042523671 @default.
- W3138836252 cites W2044490027 @default.
- W3138836252 cites W2044663447 @default.
- W3138836252 cites W2047287371 @default.
- W3138836252 cites W2052821148 @default.
- W3138836252 cites W2053482239 @default.
- W3138836252 cites W2058994509 @default.
- W3138836252 cites W2060591145 @default.
- W3138836252 cites W2060966918 @default.
- W3138836252 cites W2062038611 @default.
- W3138836252 cites W2065498479 @default.
- W3138836252 cites W2069568117 @default.
- W3138836252 cites W2069778813 @default.
- W3138836252 cites W2083924613 @default.
- W3138836252 cites W2087183014 @default.
- W3138836252 cites W2090006134 @default.
- W3138836252 cites W2092584020 @default.
- W3138836252 cites W2094217156 @default.
- W3138836252 cites W2100896869 @default.
- W3138836252 cites W2107724868 @default.
- W3138836252 cites W2124709351 @default.
- W3138836252 cites W2134318260 @default.
- W3138836252 cites W2136805196 @default.
- W3138836252 cites W2138533209 @default.
- W3138836252 cites W2139193183 @default.
- W3138836252 cites W2143290949 @default.
- W3138836252 cites W2145833868 @default.
- W3138836252 cites W2147328450 @default.
- W3138836252 cites W2147944801 @default.
- W3138836252 cites W2154104399 @default.
- W3138836252 cites W2154672959 @default.
- W3138836252 cites W2166047863 @default.
- W3138836252 cites W2169507090 @default.
- W3138836252 cites W2176999773 @default.
- W3138836252 cites W2238835878 @default.
- W3138836252 cites W2272981894 @default.
- W3138836252 cites W2296829390 @default.
- W3138836252 cites W2315746341 @default.
- W3138836252 cites W2327884384 @default.
- W3138836252 cites W2329687435 @default.
- W3138836252 cites W2346557320 @default.
- W3138836252 cites W2516650420 @default.
- W3138836252 cites W2582334138 @default.
- W3138836252 cites W2584740589 @default.
- W3138836252 cites W2595896188 @default.
- W3138836252 cites W2756160908 @default.
- W3138836252 cites W2766779676 @default.
- W3138836252 cites W2781978109 @default.
- W3138836252 cites W2794065196 @default.
- W3138836252 cites W2804030490 @default.
- W3138836252 cites W2897074687 @default.
- W3138836252 cites W2901570789 @default.
- W3138836252 cites W2902329803 @default.