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Updated: Nov 13, 2025

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing
Published on: July 3, 2020
Mechanical Properties of Epoxy Adhesive Under Thermal Aging and Their Chemical Degradation Behavior
Bongjin Chung1, Shin Sungchul2, Jaeho Shim3
1Department of Advanced Materials Engineering, The University of Suwon, 17, Wauan-gil, Bongdam-eup, Hwaseong-si, Gyeonggi-do 18323, Republic of Korea.
Abstract:
Epoxy adhesive was analyzed under long term thermal aging and mechanical properties and chemical degradation were observed by X-ray photoelectron spectroscopy (XPS). Long term thermal exposure of epoxy causes a noticeable reduction in adhesive properties. We developed a predictive model of temperature and time dependent aging. The temperature dependent aging behavior of epoxy adhesive shows good agreement with conventional Arrhenius equations. Using XPS analysis, we also discovered a correlation between chemical degradation and the adhesive properties. Decay of C-C bonding ratio induced chain-scission of epoxy adhesive; increase of total numbers of C-O and C═O induced oxidation of epoxy adhesive during thermal exposure.
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