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Epoxy/anhydride thermosets modified with end-capped star polymers with poly(ethyleneimine) cores of different molecular weight and poly(epsilon-caprolactone) arms

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10.3144/expresspolymlett.2015.76
 
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Acebo Gorostiza, Cristina
Alorda, M.
Ferrando Piera, FrancescMés informació
Fernández Francos, XavierMés informacióMés informacióMés informació
Serra Albet, Maria ÀngelsMés informació
Morancho Llena, José MaríaMés informacióMés informacióMés informació
Salla Tarragó, José MaríaMés informacióMés informació
Ramis Juan, XavierMés informacióMés informacióMés informació
Document typeArticle
Defense date2015-09-01
Rights accessOpen Access
Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain
Abstract
Multiarm star polymers, with a hyperbranched poly(ethyleneimine) (PEI) core and poly(epsilon-caprolactone) (PCL) arms end-capped with acetyl groups were synthesized by ring-opening polymerization of epsilon-caprolactone from PEI cores of different molecular weight. These star polymers were used as toughening agents for epoxy/anhydride thermosets. The curing process was studied by calorimetry, thermomechanical analysis and infrared spectroscopy. The final properties of the resulting materials were determined by thermal and mechanical tests. The addition of the star polymers led to an improvement up to 130% on impact strength and a reduction in the thermal stresses up to 55%. The structure and molecular weight of the modifier used affected the morphology of the resulting materials. Electron microscopy showed phase-separated morphologies with nano-sized fine particles well adhered to the epoxy/anhydride matrix when the higher molecular weight modifier was used.
CitationAcebo, C., Alorda, M., Ferrando, F., Fernández, X., Serra, À., Morancho, J., Salla, J., Ramis, X. Epoxy/anhydride thermosets modified with end-capped star polymers with poly(ethyleneimine) cores of different molecular weight and poly(epsilon-caprolactone) arms. "Express polymer letters", 01 Setembre 2015, núm. 9, p. 809-823. 
URIhttp://hdl.handle.net/2117/76456
DOI10.3144/expresspolymlett.2015.76
ISSN1788-618X
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  • POLTEPO - Polímers Termoestables Epoxídics - Articles de revista [99]
  • Departament de Màquines i Motors Tèrmics - Articles de revista [429]
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