Thermally exfoliated graphene oxide (TEGO) reinforced fast-cure epoxy resin: cure behavior and flexural properties

Elmas, Sinem and Şaş Çaycı, Hatice Sinem (2022) Thermally exfoliated graphene oxide (TEGO) reinforced fast-cure epoxy resin: cure behavior and flexural properties. Erciyes Üniversitesi Fen Bilimleri Enstitüsü Fen Bilimleri Dergisi, 38 (2). pp. 168-179. ISSN 1012-2354

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Fast-cure epoxy resin systems allow being manufacturing of composite parts in minutes. However, the brittle nature of the polymer limits its usage due to crack initiation and growth. Nanofillers are widely used to enhance the epoxy resin’s mechanical performance. However, final mechanical properties are typically governed by the process parameters, including curing temperature and time; therefore, the curing behavior of nano-integrated composites should also be characterized. Thermally exfoliated graphene oxide (TEGO) has a significant influence on the mechanical properties of the polymer matrix, even at low percentages. This study introduced TEGO into the fast cure epoxy resin system, and the cure kinetics was analyzed using dynamic differential scanning calorimetry (DSC). TEGO modification increased the curing time, but the system still maintains fast cure properties. Dynamic mechanical analysis (DMA) illustrated that the glass transition temperature (Tg) of TEGO-fast cure epoxy nanocomposite increased by 10°C. Moreover, flexural tests revealed that flexural stress was increased by 12.85% with even a low percentage of TEGO addition. Fracture surfaces were analyzed by scanning electron microscopy, and toughening mechanisms were addressed.
Item Type: Article
Uncontrolled Keywords: Fast-cure epoxy resin, Cure kinetic, Thermally exfoliated graphene oxide (TEGO), Flexural properties
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering and Natural Sciences
Integrated Manufacturing Technologies Research and Application Center
Depositing User: Hatice Sinem Şaş Çaycı
Date Deposited: 08 Oct 2022 22:16
Last Modified: 08 Oct 2022 22:16

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