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RESEARCH PRODUCT

Chain-extending of Hydroxytelechelic Polybutadiene: Synthesis and Characterization

Michael LemoineGilles BoniLaurent BrachaisJean-pierre CouvercelleClaire-hélène Brachais

subject

Reaction mechanismTelechelic polymerPolymers and PlasticsSuccinic anhydrideGeneral ChemistryOligomerchemistry.chemical_compoundPolybutadienechemistryPolymer chemistryMaterials ChemistryCeramics and CompositesMolar mass distributionOrganic chemistryGlass transitionMacromolecule

description

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.

yearjournalcountryeditionlanguage
2010-12-29Journal of Macromolecular Science, Part A
https://doi.org/10.1080/10601325.2011.534717