Comparison of Glass-Transition Temperatures for Epoxy Polymers Obtained by Methods of Thermal Analysis

• Published in: Mechanics of composite materials Vol. 56; no. 2; pp. 227 - 240
• Main Authors: Startsev, O. V., Vapirov, Yu. M., Lebedev, M. P., Kychkin, A. K.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-05-2020; Springer; Springer Nature B.V
• Subjects: Ceramics; Characterization and Evaluation of Materials; Chemistry and Materials Science; Classical Mechanics; Comparative analysis; Composite materials; Composites; Epoxy resins; Fiber composites; Fiber reinforced polymers; Glass; Glass transition temperature; Heating rate; Materials Science; Natural Materials; Polymer industry; Polymer matrix composites; Solid Mechanics; Temperature; Temperature distribution; Thermal analysis; calorimetry; thermomechanical analysis; glass-transition temperature; epoxy polymer; dynamic mechanical analysis
• ISSN: 0191-5665; 1573-8922
• DOI: 10.1007/s11029-020-09875-5

In this review, the characteristic temperatures for epoxy polymers and epoxy matrices of fiber-reinforced composites in the glass-transition ( α-transition) range determined using different methods of thermal analysis (DSC, DMA, and TMA) are compared. The influence of loading frequency in the DMA method and of uniformity of heating and postcuring of specimens in all the methods is revealed. The agreement between the glass-transition temperatures given by different methods is achieved using the same characteristic points in experimental curves and the same time parameters (the frequency of external actions, heating rate, and the uniformity of temperature distribution in specimens in testing chambers).