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Photocuring of cycloaliphatic epoxy formulations using polyesters with multiarm star topology as additives

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10.1002/app.40005
 
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hdl:2117/23102

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Flores Guillen, Marjorie
Fernández Francos, XavierMés informacióMés informacióMés informació
Ramis Juan, XavierMés informacióMés informacióMés informació
Sangermano, Marco
Ferrando Piera, FrancescMés informació
Serra Albet, Maria ÀngelsMés informació
Document typeArticle
Defense date2014-03-15
Rights accessRestricted access - publisher's policy
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
Multiam star polyesters were synthesized by growing poly(e- caprolactone) (PCL) arms from hyperbranched polyesters cores of different molecular weight and used as polymeric modifiers in UV-curable cationic formulations based on a biscycloaliphatic epoxy resin. The effect of the multiarm stars on the curing kinetics has been investigated by real-time FTIR. The thermal-mechanical properties of the photocured thermosets have been studied with calorimetry and dynamomechanical and thermogravimetric analysis. Impact strength tests have been performed to assess their effect on the toughness of the cured materials. An accelerative effect of these modifiers has been observed as a consequence of the participation of the hydroxyl groups of the modifiers in the cationic curing of the epoxy resin. A modest increase in toughness accompanied by a decrease in the glass transition are observed, as a consequence of the incorporation of the modifiers into the network structure, leading to homogeneous, in situ reinforced materials. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2014, 131, 40005. Copyright © 2014 Wiley Periodicals, Inc.
CitationFlores, Marjorie [et al.]. Photocuring of cycloaliphatic epoxy formulations using polyesters with multiarm star topology as additives. "Journal of applied polymer science", 15 Març 2014, vol. 131, núm. 6, p. 1-9. 
URIhttp://hdl.handle.net/2117/23102
DOI10.1002/app.40005
ISSN0021-8995
Publisher versionhttp://onlinelibrary.wiley.com/doi/10.1002/app.40005/abstract
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  • TERFIQ - Grup de Termodinàmica i Fisico-Química - Articles de revista [61]
  • Departament de Màquines i Motors Tèrmics - Articles de revista [429]
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