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Polymers 2015, 7(4), 680-694; doi:10.3390/polym7040680

Enhancement in the Glass Transition Temperature in Latent Thiol-Epoxy Click Cured Thermosets

1
Department of Analytical and Organic Chemistry, University Rovira i Virgili, C/Marcel•lí Domingo s/n, 43007 Tarragona, Spain
2
Thermodynamics Laboratory, ETSEIB (Escola Tècnica Superior d'Enginyeria Industrial de Barcelona), University Politècnica de Catalunya, C/Av. Diagonal 647, 08028 Barcelona, Spain
3
Centre Tecnològic de la Química de Catalunya C/Marcel•lí Domingo s/n, 43007 Tarragona, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Antonio Pizzi
Received: 19 March 2015 / Revised: 27 March 2015 / Accepted: 31 March 2015 / Published: 9 April 2015
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Abstract

Tri and tetrafunctional thiol were used as curing agent for diglycidyl ether of bisphenol A (DGEBA) catalyzed by a commercially available amine precursor, LC-80. Triglycidyl isocianurate (TGIC) was added in different proportions to the mixture to increase rigidity and glass transition temperature (Tg). The cooperative effect of increasing functionality of thiol and the presence of TGIC in the formulation leads to an increased Tg without affecting thermal stability. The kinetics of the curing of mixtures was studied by calorimetry under isothermal and non-isothermal conditions. The latent characteristics of the formulations containing amine precursors were investigated by rheometry and calorimetry. The increase in the functionality of the thiol produces a slight decrease in the storage lifetime of the mixture. The materials obtained with tetrathiol as curing agent showed the highest values of Young’s modulus and Tg. View Full-Text
Keywords: thermosets; thiol; epoxy resin; triglycidyl isocyanurate; click reaction; latency thermosets; thiol; epoxy resin; triglycidyl isocyanurate; click reaction; latency
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Guzmán, D.; Ramis, X.; Fernández-Francos, X.; Serra, A. Enhancement in the Glass Transition Temperature in Latent Thiol-Epoxy Click Cured Thermosets. Polymers 2015, 7, 680-694.

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