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Influence of the end groups of hyperbranched poly(glycidol) on the cationic curing and morphology of diglycidylether of bisfenol A thermosets
Santiago, David; Morell, Mireia; Fernández Francos, Xavier; Serra Albet, Àngels; Salla Tarragó, José María; Ramis Juan, Xavier
Universitat Politècnica de Catalunya. Departament de Màquines i Motors Tèrmics; Universitat Politècnica de Catalunya. TERFIQ - Grup de Termodinàmica i Fisico-Química
The cationic curing of DGEBA with hyperbranched polymers (HBPs) based on poly(glycidol) using ytterbium triflate as initiator, has been studied. Poly(glycidol) (PG) has been synthesized and the terminal hydroxyl groups have been partially end-capped with benzoyl end groups to produce benzoylated poly(glycidol) (PGBz). The hydrophylic character caused by the high hydroxyl group content of unmodified PG limits its solubility in DGEBA, while a partial modification with benzoyl groups makes PGBz fully miscible in DGEBA. Therefore, important differences are observed with respect to the curing kinetics, network development, properties and morphology of the cured materials, which may be related to the hydroxyl group content of the HBPs.
Peer Reviewed
Àrees temàtiques de la UPC::Física::Termodinàmica
Hyperbranched polymers
Addition polymerization
Polimers hiperramificats
polimeritzacio
info:eu-repo/semantics/publishedVersion
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