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

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

Abstract

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.

Citation

Maljaee, H., Ghiassi, B., & Lourenço, P. B. (2017). Effect of synergistic environmental conditions on thermal properties of a cold curing epoxy resin. Composites Part B: Engineering, 113, 152-163. https://doi.org/10.1016/j.compositesb.2017.01.027

• 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
• DOI: https://doi.org/10.1016/j.compositesb.2017.01.027
• Keywords: Mechanical Engineering; Industrial and Manufacturing Engineering; Mechanics of Materials; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/1309907
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1359836816316766