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The effects of carbon nanoparticles on curing kinetics of epoxy modified with triblock copolymer

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Abstract

This work studies the effects of combining triblock copolymers with carbon nanoparticles (carbon nanotubes, graphene and carbon black) on curing kinetics. The chosen triblock copolymer was poly (propylene glycol)-block-poly (ethylene glycol)-block-poly (propylene glycol) (PPG-b-PEG-b-PPG), which has different contents of PEG in its structure. The main objective is to investigate the influence of the miscibility of the PPG-b-PEG-b-PPG copolymer in epoxy nanocomposites. The PEG fraction in the copolymer structure was determinant for miscibility. The copolymer with the highest PEG fraction (50%) in its structure showed miscibility. The copolymer miscibility was critical for nanoparticle–matrix synergy, and the PPG-b-PEG-b-PPG copolymer nanocomposite with 50 wt% PEG showed a greater increase in E’ in relation to the nanocomposite with PPG-b-PEG-b-PPG with 10% by weight of PEG. Cure kinetics results showed that the incorporation of carbon nanoparticles delays the kinetics as the temperature increases. Additionally, the miscible block copolymer delayed the curing reaction, whereas the immiscible one accelerated it, even with the addition of nanoparticles. Finally, DSC analysis allowed to verify that the cure kinetics of all studied copolymer nanocomposite systems satisfy Kamal’s autocatalytic model.

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Data availability statement

The raw/processed data required to reproduce these findings cannot be shared at this time due to technical or time limitations.

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Acknowledgements

This study was partially financed by the Coordenação de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES) - Finance Code 001. The authors would like to thank for the financial resources provided by CNPq and FAPESC/PAP.

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Authors and Affiliations

  1. Santa Catarina State University - UDESC, Joinville, SC, Brazil

    Bruna Louise Silva, Marcia Bär Schuster, Roger Hoel Bello, Daniela Becker & Luiz Antonio Ferreira Coelho

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  1. Bruna Louise Silva
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  2. Marcia Bär Schuster
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  3. Roger Hoel Bello
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  5. Luiz Antonio Ferreira Coelho
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Correspondence to Bruna Louise Silva.

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Silva, B.L., Schuster, M.B., Bello, R.H. et al. The effects of carbon nanoparticles on curing kinetics of epoxy modified with triblock copolymer. Polym. Bull. 79, 21–36 (2022). https://doi.org/10.1007/s00289-020-03458-z

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  • DOI: https://doi.org/10.1007/s00289-020-03458-z

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