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Disclosing the complex crystallization of PBAT/PLA/Babassu biocompounds through MDSC analysis

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Abstract

Biocompounds based on poly(butylene adipate‐co‐terephthalate) (PBAT) and polylactic acid (PLA) were produced at 50:50 with 1% and 5% of Babassu. Modulated differential scanning calorimetry was employed to elucidate their complex melt and cold crystallizations and recrystallization. Heat flow signals under applied amplitudes/frequencies did not significantly change; hence, 1 K/60 s was selected to perform the crystallization tests. From the non-reversing heat flow signal, higher cooling/heating rates led to higher crystallization rates, and under higher heating rates much PLA’s polymorphic crystalline phase is produced. PLA’s recrystallization which occurs within its melting increased with Babassu addition. Dynamic mechanical analysis and scanning electron microscopy indicated absence of Babassu aggregates resulted from the proper processing, adding PBAT to PLA improved the energy dissipation mechanisms as translated through higher stress support; related to Babassu adding 1% to PBAT/PLA the stress was improved and it acted as toughening agent. PBAT/PLA/Babassu besides environmentally safe are industrially advantageous once provide options for application such as food packing and general products.

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Data availability

Data will be made available on request.

Notes

  1. The methodology applied during analysis and data treatment of MDSC signals is provided in the Supplementary Material.

  2. Scans acquired in higher rates are included in Supplementary Material.

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Acknowledgements

The authors would like to thank Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for the fellowships of Prof Laura Carvalho, Prof Edcleide Araújo and Prof Renate Wellen; the financial support from Deutscher Akademischer Austauschdienst (DAAD) and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) within the PROBRAL project PPP Brasilien (Projektbezogener Personenaustausch Brasilien). We are deeply grateful to Katja Marnitz at Fraunhofer IFAM for her technical support with the MDSC experiments.

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Authors and Affiliations

  1. Department of Materials Engineering, Federal University of Paraíba, João Pessoa, PB, 58051-085, Brazil

    Renate M. R. Wellen & Ana B. S. Barros

  2. Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM, 28359, Bremen, Germany

    Renate M. R. Wellen, Katharina Haag & Katharina Koschek

  3. Department of Materials Engineering, Federal University of Campina Grande, Campina Grande, PB, 58249-140, Brazil

    Renate M. R. Wellen, Nichollas G. Jaques, Dayanne D. S. Morais, Débora E. O. Almeida, Edcleide M. Araújo & Laura H. Carvalho

Authors
  1. Renate M. R. Wellen
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  2. Nichollas G. Jaques
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  3. Ana B. S. Barros
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  4. Dayanne D. S. Morais
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  6. Edcleide M. Araújo
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  7. Katharina Haag
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  8. Laura H. Carvalho
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  9. Katharina Koschek
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Contributions

Renate M. R. Wellen: writing, supervising; Nichollas G. Jaques: writing, plotting; Ana B. S. Barros: writing, plotting; Dayanne D. S. Morais: writing, extrusion; Débora E. O. Almeida: writing, plotting; Edcleide M. Araújo: writing, methodology; Katharina Haag: writing, supervising; Laura H. Carvalho: writing, methodology; Katharina Koschek: writing, supervising.

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Correspondence to Renate M. R. Wellen.

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Wellen, R.M.R., Jaques, N.G., Barros, A.B.S. et al. Disclosing the complex crystallization of PBAT/PLA/Babassu biocompounds through MDSC analysis. J Therm Anal Calorim 147, 7299–7310 (2022). https://doi.org/10.1007/s10973-021-11058-w

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  • DOI: https://doi.org/10.1007/s10973-021-11058-w

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