Abstract
This study investigates the feasibility of producing filaments and 4D printed parts with shape memory properties using Polylactic Acid/Ethylene-Butyl Acrylate-Maleic Anhydride (PLA/EBA-MAH) blends. The blends were melt blended and characterized using various techniques, including Fourier Transform Infrared Spectroscopy (FTIR) to analyze chemical interactions, Scanning Electron Microscopy (SEM) to study morphology, and Rheological analysis for viscoelastic behavior assessment. Dynamic Mechanical Analysis (DMA) was conducted to evaluate mechanical properties and glass transition temperature. The PLA/EBA-MAH 50/50 blend exhibited a co-continuous morphology, and storage modulus and viscosity decreased with increasing EBA-MAH content, emphasizing the enhanced processability of these compositions. In 4D printing experiments, the filaments demonstrated successful extrusion and shape memory activation. The 4D printed parts exhibited shape recovery in a rheometer, showcasing remarkable memory retention upon deformation. This achievement is noteworthy, as the majority of the literature focuses on shape memory activation solely in water for hydrophilic polymers. The successful production of filaments and 4D printed parts with shape memory properties at a high filling density (100%) and an orientation of approximately 45° further extends their potential in diverse applications, particularly for flexible filaments with shape memory capabilities. Overall, this research not only demonstrates the successful production of filaments and 4D printed structures but also highlights the impressive shape memory behavior of PLA/EBA-MAH blends. The combination of favorable rheological properties and shape memory activation expands the potential of these blends for applications requiring flexible and shape-shifting materials.
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Data Availability
The dataset used in this study is available upon reasonable request.
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Acknowledgements
The authors would like to thank the Brazilian research funding agencies National Council for Science and Technology (CNPq), (PA grant number 442128/20142/UNIVERSAL, TJAM grant number 426191/20161 and 577061/20089) and the Coordination for the Improvement of Higher Education Personnel (CAPES) (RBC: Scholarship).
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RB - Conducted the tests, plotted graphs and figures, wrote the article. PA - Helped with essays, helped with graphics and figures, proofread the English of the article. AS - Performed the SEM and cryogenic tests and assisted in the analysis and interpretation of the results. Helped with changes suggested by reviewers on SEM modifications and new analyses. GF - Guidance, review of the article, procurement of raw materials, assistance in the literature review (supervisor teacher). TM - Guidance, review of the article, laboratory coordinator, assistance in the literature review (supervisor teacher). All authors reviewed the manuscript.
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da Cunha, R.B., Agrawal, P., da Silva Lúcio, A. et al. Development of Shape Memory Polylactic Acid/Ethylene-Butyl Acrylate-Maleic Anhydride (PLA/EBA-MAH) Blends for 4D Printing Applications. J Polym Environ 32, 1423–1438 (2024). https://doi.org/10.1007/s10924-023-03072-w
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DOI: https://doi.org/10.1007/s10924-023-03072-w