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Effect of synergistic environmental conditions on thermal properties of a cold curing epoxy resin

Maljaee, Hamid; Ghiassi, Bahman; Louren�o, Paulo B.


Hamid Maljaee

Bahman Ghiassi

Paulo B. Louren�o


This study presents an investigation addressing the effect of environmental conditions on the thermal properties of a cold curing epoxy resin used in repair and strengthening of masonry structures. The exposure conditions consist of laboratory indoor conditions (IC), long-term water immersion (WI), hygrothermal exposure (HG) and outdoor real exposure conditions (OC). The changes in the glass transition temperature, Tg, relaxation enthalpy and enthalpy peak temperature are monitored with Differential Scanning Calorimetry (DSC). Different measurement techniques for obtaining the Tg from DSC curves are also presented and discussed. The results showed a reduction of Tg in WI tests due to plasticization, which reversed at long-term periods. In HG conditions, post-curing of epoxy resin led to an increment of Tg. It was observed that the changes of Tg in OC conditions in the studied environment have a good correlation with the moisture absorption level and the obtained results from WI tests.

Journal Article Type Article
Acceptance Date Jan 22, 2017
Online Publication Date Jan 23, 2018
Publication Date Mar 15, 2017
Deposit Date Nov 27, 2018
Journal Composites Part B: Engineering
Print ISSN 1359-8368
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 113
Pages 152-163
Keywords Mechanical Engineering; Industrial and Manufacturing Engineering; Mechanics of Materials; Ceramics and Composites
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