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- W2040370161 abstract "Resume Nous avons etudie par voie cinetique la bromation heterolytique, en phase liquide homogene, du polystyrene (PS) par Br 2 . Les catalyseurs sont des acides de Lewis (AL) SnCl 4 , SbCl 5 et TiCl 4 . L'equation des vitesses est: ν = k 4 [Al] α [Br 2 ] 3 [PS] ou ∝ = 1,22; 1,25; 2,0 pour SbCl 5 , TiCl 4 , SnCl 4 , respectivement. k 4 s'accroit avec la fraction molaire en CH 2 Cl 2 dans le binaire cyclohexane—CH 2 Cl 2 . La reactivite du PS est tres proche de celle du cumene, dans nos mesures cinetiques. Aucun “effect de proximite” n'a pu etre decele: le voisinage d'un site brome n'a aucune influence sur la reactivite d'une unite constitutive styrene. Un mecanisme de bromation est propose." @default.
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- W2040370161 date "1991-01-01" @default.
- W2040370161 modified "2023-09-25" @default.
- W2040370161 title "Bromation heterolytique du polystyrene en phase homogene—II. Etude cinetique de la bromation catalysee par SnCl4, SbCl5 et TiCl4" @default.
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- W2040370161 doi "https://doi.org/10.1016/0014-3057(91)90194-s" @default.
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