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Efficient impact resistance improvement of epoxy/anhydride thermosets by adding hyperbranched polyesters partially modified with undecenoyl chains

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10.1016/j.polymer.2012.09.031
 
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hdl:2117/19655

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Flores Guillen, Marjorie
Fernández Francos, XavierMés informacióMés informacióMés informació
Ferrando Piera, FrancescMés informació
Ramis Juan, XavierMés informacióMés informacióMés informació
Serra Albet, Maria ÀngelsMés informació
Document typeArticle
Defense date2012-10-26
PublisherElsevier
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
Boltorn H30 hyperbranched polyester has been modified by acylation with 10-undecenoyl chloride to obtain HBPs with different degree of modification. These HBPs have been used as reactive modifiers, in a proportion of 5 and 10%, of DGEBA/MHHPA/BDMA formulations. The materials obtained have been characterized and their mechanical properties evaluated. Depending on the degree of modification of the HBP, homogeneous or phase separated materials were obtained, which influence the properties. When the degree of modification of the HBP was a 76%, a 4-fold increase in impact resistance was achieved without sacrificing thermomechanical characteristics, thermal stability or processability. This has been attributed to the regular microphase separation achieved and to the good interfacial interaction of the microparticles with the epoxy matrix by formation of covalent bonds between the remaining hydroxyl groups at the shell of the HBP and the anhydride as the curing agent.
CitationFlores, M. [et al.]. Efficient impact resistance improvement of epoxy/anhydride thermosets by adding hyperbranched polyesters partially modified with undecenoyl chains. "Polymer", 26 Octubre 2012, vol. 53, núm. 23, p. 5232-5241. 
URIhttp://hdl.handle.net/2117/19655
DOI10.1016/j.polymer.2012.09.031
ISSN0032-3861
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  • TERFIQ - Grup de Termodinàmica i Fisico-Química - Articles de revista [61]
  • Departament de Màquines i Motors Tèrmics - Articles de revista [449]
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