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Synthèse de polybutadiènes nitrés hydroxytéléchéliques par nitromercuration-demercuration—I. Étude de la réaction de nitromercuration

✍ Scribed by F. Lugadet; A. Deffieux; C. Servens; M. Fontanille


Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
490 KB
Volume
25
Category
Article
ISSN
0014-3057

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✦ Synopsis


R6sum6---Parmi les diff~rentes m&hodes de nitration des polybutadi6nes, celle qui utilise la nitromercuration par [HgCl2, NaNO2] est int6ressante d plusieurs points de vue. Dans un premier article, la r6action de nitromercuration est plus particuli6rement examin6e. Les conditions permettant de limiter l'influence d'une r6action de chloromercuration des chaines ainsi que la cause de l'insolubilisation partielle des polym6res au cours de la transformation ont 6t6 recherch6es. Cette derni~re est &roitement li6e au taux de mercure fix6 sur les chaines. La nitromercuration des deux types d'insaturations (1,2 et 1,4) s'effectue sans s61ectivit6 marqu6e. Enfin, les proportions relatives de groupements nitro et nitrite fix6s sur le polym6re selon les conditions de la r6action ont 6t6 examin6es. L'addition de d6riv6s ph6noliques au milieu r6actionnel permet d'accroitre la s61ectivit~ en groupes nitro.


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