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Michaël Lemoine Claire-Helene Brachais Gilles Boni Laurent Brachais Jean-Pierre Couvercelle 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(2):100-107
Extension of hydroxytelechelic polybutadiene oligomers ( 3200 g/mol) is performed in mild conditions, in order to avoid backbone modifications, using succinic anhydride or methylenedicyclohexyl diisocyanate. The two routes present significative extension of the initial oligomers. Extension through the anhydride route, in the presence of DCC and DMAP, leads to new hydroxytelechelic oligomers ( 8000 g/mol). Extension through the diisocyanate route, catalyzed by DBTL at 65°C leads to hydroxytelechelic oligomers of higher average molecular weight ( 20000 g/mol). New materials are characterized by FTIR/1H-NMR and changes in their Tg according to , are discussed. The influence of reaction time on the length of the macromolecular chains is also studied. 相似文献
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J. P. Kennedy 《高分子科学杂志,A辑:纯化学与应用化学》2013,50(2):329-346
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