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Using sodium linoleate as a nucleating agent to improve the properties of PBAT/CaCO3 composites

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Abstract

The purpose of this study is to investigate the use of nucleating agent to improve the overall performance of polybutylene adipate-co-terephthalate (PBAT) and calcium carbonate (CaCO3) composites. Specifically, sodium linoleate (Na-LL) is used as a chemical nucleating agent to improve the crystallization behavior of the material during melting extrusion processing. Mechanical, thermal, and morphological characteristics of PBAT and its composites were investigated. And a preliminary exploration was conducted on the mechanism of Na-LL improving the performance of PBAT. In this work, a formula has been obtained that dramatically saves production costs while improving product performance. After adding Na-LL to the composites, the thermal properties of the material were significantly improved, with a maximum crystallization temperature increase of 27.79 °C. In addition, composites offer superior mechanical properties compared to pure PBAT. When 0.2 parts by mass(pbw) Na-LL was added, the flexural modulus of the composites increased from 80.0 to 145.3 MPa, increased by 81.25%. The tensile performance can still be maintained at 11.0 Mpa, with elongation at break and impact strength reduced to 347.3% and 172.1 J/m, respectively. Under these conditions, it has excellent comprehensive mechanical properties. The results in this study suggest that Na-LL is a promising nucleating agent for enhancing the performance of composites and provides potential development of advanced materials for a wide range of applications in plastic packaging and plastic bags.

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Acknowledgements

This work was financially supported by Natural Science Foundation of Changsha (No. kq2202184) and Hunan Provincial Science and Technology Department (No. 2021GK5007).

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SS was contributed to methodology, data curation, writing—original draft, visualization, investigation. ZL was contributed to writing—review and editing, visualization. YL was contributed to writing—original draft, investigation. YL was contributed to validation, supervision. J-RZ was contributed to supervision, writing—review and editing. JT was contributed to supervision, writing—review and editing. Y-FZ was contributed to project administration, funding acquisition, supervision, writing—review and editing, conceptualization.

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Correspondence to Yue-Fei Zhang.

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Sheng, S., Li, Z., Li, Y. et al. Using sodium linoleate as a nucleating agent to improve the properties of PBAT/CaCO3 composites. J Therm Anal Calorim 148, 13859–13868 (2023). https://doi.org/10.1007/s10973-023-12584-5

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