Water sorption and diffusion studies in an epoxy resin system

Maggana, C; Pissis, P

dc.contributor.author	Maggana, C	en
dc.contributor.author	Pissis, P	en
dc.date.accessioned	2014-03-01T01:15:23Z
dc.date.available	2014-03-01T01:15:23Z
dc.date.issued	1999	en
dc.identifier.issn	0887-6266	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13469
dc.subject	epoxy resins	en
dc.subject	Fickian diffusion	en
dc.subject	water sorption	en
dc.subject	water-polymer interaction	en
dc.subject	Guggenheim-Anderson-de Boer equation	en
dc.subject.classification	Polymer Science	en
dc.subject.other	Crosslinking	en
dc.subject.other	Density (specific gravity)	en
dc.subject.other	Diffusion in solids	en
dc.subject.other	Ethers	en
dc.subject.other	Glass transition	en
dc.subject.other	Mathematical models	en
dc.subject.other	Phase separation	en
dc.subject.other	Plasticizers	en
dc.subject.other	Reaction kinetics	en
dc.subject.other	Saturation (materials composition)	en
dc.subject.other	Water absorption	en
dc.subject.other	Fickian diffusion	en
dc.subject.other	Guggenheim-Anderson-de Boer equation	en
dc.subject.other	Linear expansion coefficient	en
dc.subject.other	Thermomechanical analysis	en
dc.subject.other	Epoxy resins	en
dc.title	Water sorption and diffusion studies in an epoxy resin system	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/(SICI)1099-0488(19990601)37:11<1165::AID-POLB11>3.0.CO;2-E	en
heal.identifier.secondary	http://dx.doi.org/10.1002/(SICI)1099-0488(19990601)37:11<1165::AID-POLB11>3.0.CO;2-E	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	The kinetics of water absorption in epoxide materials was studied by the aid of a diglycidyl ether of bisphenol-A-triethylenetetramine (DGEBA-TETA) epoxy-resin system containing various amounts of the plasticizer THIOCOL (0-40 phr). The presence of plasticizer permits the formation of products with different crosslinking densities and hydrophilic characters. Dynamic water absorption experiments were carried out at 15, 40, and 70 degrees C. For the fitting of the experimental results, a new model was used, based on a model proposed earlier by Jacobs and Jones. This model considers epoxide product as a two-phase system consisting of a master phase (where the major part of the water is absorbed), which is homogeneous and nonpolar (phase 1), and of a second phase with different density and/or hydrophilic character (phase 2). By making the assumption that water diffusion can take place independently in the different phases of the material in accordance with Fick's second law, we can calculate the diffusion coefficient D and the water content at saturation M-infinity for each phase separately. Equilibrium water sorption measurements were performed at 40 degrees C, and the data were analyzed and discussed based on the Guggenheim-Anderson- de Beer (GAB) equation, the results being in support of the two-phase model used in the analysis of absorption kinetics. The linear expansion coefficient and the glass transition temperature of the materials, employed in the discussion of the results, were measured by thermomechanical analysis. (C) 1999 John Wiley & Sons, Inc.	en
heal.publisher	John Wiley & Sons Inc, New York, NY, United States	en
heal.journalName	Journal of Polymer Science, Part B: Polymer Physics	en
dc.identifier.doi	10.1002/(SICI)1099-0488(19990601)37:11<1165::AID-POLB11>3.0.CO;2-E	en
dc.identifier.isi	ISI:000079837100011	en
dc.identifier.volume	37	en
dc.identifier.issue	11	en
dc.identifier.spage	1165	en
dc.identifier.epage	1182	en