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dc.contributor.author Stefani, Pablo Marcelo
dc.contributor.author Moschiar, Stella Maris
dc.contributor.author Aranguren, Mirta Ines
dc.date.available 2018-02-19T21:48:27Z
dc.date.issued 2001-03
dc.identifier.citation Stefani, Pablo Marcelo; Moschiar, Stella Maris; Aranguren, Mirta Ines; Curing kinetics of epoxy-urethane copolymers; John Wiley & Sons Inc; Journal of Applied Polymer Science; 79; 10; 3-2001; 1771-1779
dc.identifier.issn 0021-8995
dc.identifier.uri http://hdl.handle.net/11336/36800
dc.description.abstract The cure of the epoxy resin diglycidyl ether of bisphenol A (Araldyt GY9527) with a mixture of cycloaliphatic amines (Distraltec) was studied, and the focus was on the effect of the copolymerization with a commercial polyurethane (PU) elastomer (Desmocap 12). A simplified phenomenological model was proposed to represent the copolymerization reaction. It considered the effect of the temperature and the concentration of the elastomer on the reaction rate, and it was simple enough to be included in models of processing conditions. A nonlinear regression analysis of the experimental conversion data obtained from differential scanning calorimetry was utilized to find the best fitting parameters to Kamal's equation for the chemically controlled part of the reaction (short times) under isothermal and constant heating-rate conditions. The Rabinowitch approach together with the Addam–Gibbs theory was utilized to introduce the effect of diffusion control at the end of the reaction on the overall constant for the reaction rate. The Di Benedetto equation was used to predict the conversion at which vitrification takes place for each run. Experimental results for conversions higher than this critical conversion were utilized to obtain information about the diffusion kinetic constant using a nonlinear regression analysis as previously. The overall model obtained was used to calculate a calorimetric conversion and reaction rate as functions of time, which was in excellent agreement with the experimental results. The addition of PU elastomers affected the values of the activation energies of the chemically and diffusion controlled parts of the reaction, as well as the final conversion reached by the epoxy–amine system. The proposed model allowed prediction of all the observed features using parameters that were independent of the temperature of the curing reaction.
dc.format application/pdf
dc.language.iso eng
dc.publisher John Wiley & Sons Inc
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject EPOXY-AMINE
dc.subject POLYUIRETHANE MODIFIERS
dc.subject CURING KINETIC
dc.subject DIFUSSION CONTROL
dc.title Curing kinetics of epoxy-urethane copolymers
dc.type info:eu-repo/semantics/article
dc.type info:ar-repo/semantics/artículo
dc.type info:eu-repo/semantics/publishedVersion
dc.date.updated 2018-02-19T16:55:59Z
dc.journal.volume 79
dc.journal.number 10
dc.journal.pagination 1771-1779
dc.journal.pais Estados Unidos
dc.journal.ciudad ny
dc.description.fil Fil: Stefani, Pablo Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil Fil: Moschiar, Stella Maris. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.description.fil Fil: Aranguren, Mirta Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mar del Plata. Instituto de Investigaciones en Ciencia y Tecnología de Materiales. Universidad Nacional de Mar del Plata. Facultad de Ingeniería. Instituto de Investigaciones en Ciencia y Tecnología de Materiales; Argentina
dc.journal.title Journal of Applied Polymer Science
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/url/http://onlinelibrary.wiley.com/doi/10.1002/1097-4628(20010307)79:10%3C1771::AID-APP50%3E3.0.CO;2-D/abstract
dc.relation.alternativeid info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1002/1097-4628(20010307)79:10<1771::AID-APP50>3.0.CO;2-D
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    Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)

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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)