Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 89: Issue 1
Influence of the addition of erbium and ytterbium triflates in the curing kinetics of a DGEBA/ o -tolybiguanide powder mixture
Authors:
S. García Universitat Jaume I Àrea de Ciència dels Materials, Departament d’Enginyeria de Sistemes Industrials i Disseny Avda Vicent Sos Baynat s/n 12071 Castellón Spain

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A. Serra Universitat Rovira i Virgili Departament de Q. Analítica i Q. Orgànica, Facultat de Química C/Marcel·lí Domingo s/n 43007 Tarragona Spain

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X. Ramis Universitat Politècnica de Catalunya Laboratori de Termodinàmica, Escola Tècnica Superior Enginyeria Industrial Barcelona Diagonal 647 08028 Barcelona Spain

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J. Suay Universitat Politècnica de València Centro de Biomateriales Camino de Vera s/n 46071 València Spain

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Pages:
223–231
Online Publication Date:
11 Aug 2006
Publication Date:
01 Jul 2007
Article Category:
Research Article
DOI:
https://doi.org/10.1007/s10973-006-7519-0
Keywords:
catalyst; epoxy; erbium triflate; kinetics (polym.); ytterbium triflate
Restricted access

Abstract  

Solid bisphenol-A epoxy resin (DGEBA) of medium molecular mass was cured using o-tolylbiguanide (TBG) as cross-linking agent. In order to improve the kinetics of the reactive system, two Lewis acid catalysts (erbium(III) and ytterbium(III) trifluoromethanesulfonates) were added in proportions of 1 phr. The kinetic study was performed by dynamic scanning calorimetry (DSC) and the complete kinetic triplet (E, A and g(α)) determined. The kinetic analysis was performed with an integral isoconversional procedure (model-free), and the kinetic model was determined by the Coats-Redfern method and through the compensation effect (IKR). All the systems followed the m=1.5/n=0.5 isothermal curing model simulated from non-isothermal experiments. The addition of a little proportion of ytterbium or erbium triflates accelerated the curing process. In order to extract further information about the role of the lanthanide triflates added to epoxy/TBG systems, the kinetic results were compared with our previous kinetic studies made on DGEBA/lanthanide triflates initiated systems.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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