Combined use of sepiolite and a hyperbranched polyester in the modification of epoxy/anhydride coatings: A study of the curing process and the final properties

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Title: Combined use of sepiolite and a hyperbranched polyester in the modification of epoxy/anhydride coatings: A study of the curing process and the final properties
Authors: Foix, D.1, Rodríguez, M.T.2, Ferrando, F.3, Ramis, X.4, Serra, A.1 angels.serra@urv.cat
Source: Progress in Organic Coatings. Dec2012, Vol. 75 Issue 4, p364-372. 9p.
Subjects: Meerschaum, Polyesters, Epoxy compounds, Anhydrides, Surface coatings, Curing, Ether (Anesthetic), Bisphenol A
Abstract: Abstract: The curing reaction of formulations of diglycidyl ether of bisphenol A (DGEBA) and tetrahydrophthalic anhydride (THPA) catalyzed with a tertiary amine and containing sepiolite and/or hyperbranched poly(ester) has been studied by means of DSC, and the effect of each additive has been evaluated. The resulting coatings have been characterized by DMTA, TGA and also the shrinkage during the curing process has been determined. The influence of the additives in the toughness of the resulting coatings has been determined by performing standardized impact tests and observing the fracture surfaces by SEM. The values of impact strength have been correlated to the morphology of the samples by means of TEM. Also microhardness of the cured materials has been measured. [Copyright &y& Elsevier]
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Database: Engineering Source
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Abstract:Abstract: The curing reaction of formulations of diglycidyl ether of bisphenol A (DGEBA) and tetrahydrophthalic anhydride (THPA) catalyzed with a tertiary amine and containing sepiolite and/or hyperbranched poly(ester) has been studied by means of DSC, and the effect of each additive has been evaluated. The resulting coatings have been characterized by DMTA, TGA and also the shrinkage during the curing process has been determined. The influence of the additives in the toughness of the resulting coatings has been determined by performing standardized impact tests and observing the fracture surfaces by SEM. The values of impact strength have been correlated to the morphology of the samples by means of TEM. Also microhardness of the cured materials has been measured. [Copyright &y& Elsevier]
ISSN:03009440
DOI:10.1016/j.porgcoat.2012.07.013