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Comparative curing kinetics and thermal–mechanical properties of DGEBA thermosets cured with a hyperbranched poly(ethyleneimine) and an aliphatic triamine

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10.1016/j.tca.2011.08.016
 
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hdl:2117/14296

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Santiago, David
Fernández Francos, XavierMés informacióMés informacióMés informació
Ramis Juan, XavierMés informacióMés informacióMés informació
Salla Tarragó, José MaríaMés informacióMés informació
Sangermano, Marco
Document typeArticle
Defense date2011-11-10
Rights accessRestricted access - publisher's policy
All rights reserved. This work is protected by the corresponding intellectual and industrial property rights. Without prejudice to any existing legal exemptions, reproduction, distribution, public communication or transformation of this work are prohibited without permission of the copyright holder
Abstract
The use of commercially available hyperbranched poly(ethyleneimine)s (Hbpei, LupasolTM, BASF) as curing agent of DGEBA has been studied. HBpei can react with epoxy monomers by an epoxy-amine condensation mechanism and get incorporated into the network structure of the thermoset. The resulting materials have been compared with those obtained using diethylenetriamine (DETA) as curing agent. The curing kinetics have been studied with DSC and rheology. The thermal–mechanical properties have been determined with DMA and DSC. The thermal stability has been assessed with TGA. The curing kinetics and the different transformations that take place during curing of both formulations have been summarized in a TTT diagram. Because of the low mobility of HBpei, curing kinetics is slower than the formulations with DETA. Both HBpei and DETA produce homogeneous materials with similar Tg and thermal stability, but HBpei materials are more densely crosslinked than DETA because of the preexisting internal crosslinks of HBpei.
CitationSantiago, D. [et al.]. Comparative curing kinetics and thermal–mechanical properties of DGEBA thermosets cured with a hyperbranched poly(ethyleneimine) and an aliphatic triamine. "Thermochimica acta", 10 Novembre 2011, vol. 526, núm. 1-2, p. 9-21. 
URIhttp://hdl.handle.net/2117/14296
DOI10.1016/j.tca.2011.08.016
ISSN0040-6031
Publisher versionhttp://dx.doi.org/10.1016/j.tca.2011.08.016
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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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