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Study of cure kinetics of DGEBA with optically active curing agents

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Abstract

3-Deoxy-D-erythro-hexos-2-ulose bis (thiosemicarbazone) (I) readily obtained from d-glucose reacts with copper acetate hydrate to give the corresponding chelate (II). The complex (II) was acetylated to give the corresponding tri-O-acetyl derivative (III). The (I), (II), and (III) were used as optically active curing agents for diglycidyl ether of bisphenol A (DGEBA)-based epoxy resin, and the cure reaction was studied by the non-isothermal DSC method. The maximum exothermic temperature (T p) of curing of DGEBA-(III) system shifted about 313 K toward lower temperature in comparison with the T p of DGEBA/(II) system. The average E a values obtained by using Kissinger–Akahira–Sunose (KAS), Flynn–Wall–Ozawa (FWO), and isoconversional methods for non-isothermal curing of DGEBA-(I), DGEBA-(II), and DGEBA-(III) systems are 95.8, 135.5, and 85.8 kJ mol−1, respectively. The higher reactivity of (III) toward epoxide groups can be due to better solubility of the (III) in DGEBA as a result of acetylation of hydroxyl groups.

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Authors and Affiliations

  1. Department of Chemistry, Mazandaran University, Babolsar, Iran

    Mousa Ghaemy

  2. Department of Chemistry, Faculty of Basic Sciences, Islamic Azad University, Mashhad Branch, 91735-413, Mashhad, Iran

    Hossein Behmadi

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  1. Mousa Ghaemy
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  2. Hossein Behmadi
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Correspondence to Mousa Ghaemy.

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Ghaemy, M., Behmadi, H. Study of cure kinetics of DGEBA with optically active curing agents. J Therm Anal Calorim 101, 1011–1017 (2010). https://doi.org/10.1007/s10973-010-0812-y

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