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Kinetics of fast-curing epoxy resin cationic thermopolymerization: Propagated by ACE and AM mechanism

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Abstract

The kinetics of fast thermal curing epoxy resin and the fast-curing ability initiated by 4- hydroxyphenyl dialkyl sulfonium salt cationic curing agent were discussed. The curing reaction is driven by two chain propagation mechanisms. At the initial stage of the polymerization, the propagation is dominated by activated chain end (ACE) mechanism with a faster curing rate. At long time of the polymerization, the propagation is dominated by activated monomer (AM) mechanism with a lower curing rate. With the increase of curing agent content, the activation energy of ACE mechanism reduces, however, the activation energy of AM mechanism decreases first and then increases. In addition, the surface curing test was used to evaluate the fast-curing ability of this epoxy system. By adopting preferred formulation and process, this epoxy system could be cured in several seconds.

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Acknowledgements

This work is financially supported by the Ji’an Double Hundred Plan Project.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Central South University, Changsha, 410083, China

    Bingxuan Li, Jiangcong Chen, Haoyuan Wang & Hengfeng Li

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  1. Bingxuan Li
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  2. Jiangcong Chen
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  3. Haoyuan Wang
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  4. Hengfeng Li
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Contributions

BL: Conceptualization, Methodology, Resources, Investigation, Writing–original draft. JC: Conceptualization, Methodology, Resources. HW: Investigation, Writing–review & editing. HL: Supervision, Conceptualization, Methodology, Writing–review & editing.

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Correspondence to Hengfeng Li.

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Li, B., Chen, J., Wang, H. et al. Kinetics of fast-curing epoxy resin cationic thermopolymerization: Propagated by ACE and AM mechanism. J Therm Anal Calorim 147, 11899–11907 (2022). https://doi.org/10.1007/s10973-022-11381-w

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  • DOI: https://doi.org/10.1007/s10973-022-11381-w

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