Abstract
The polycaprolactone (PCL)-b-polyethylene glycol (PEG) oligomer (Oli) and its derivative containing ionic elements (ILs) were used as interfacial compatibilizers and regulators, and the polylactic acid (PLA)/PCL/Oli and PLA/PCL/ILs blends were prepared by solution blending. The effects of Oli and ILs on the phase interfacial properties, aggregated structure, crystallization and mechanical properties of PLA/PCL blends were systematically studied. The results show that the ILs with strong interfacial emulsification ability can improve the dispersion of PCL in PLA matrix, and enhance the two-phase interfacial adhesion. When the content of ILs is 5 %, ion clusters can form and alleviate the restricted crystallization of PCL, and promote the segment movement of PLA through the non-covalent bonding of ionic elements. So the crystallization ability of PLA and PCL improve simultaneously. ILs have a strong regulatory effect on the phase interfacial morphology and aggregated structure of PLA/PCL blends, and the PLA/PCL blends containing high content of 5 % ILs can significantly improve the mechanical properties of PLA/PCL blends.
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Acknowledgments: This research was supported by the National Natural Science Foundation of China (No. 51903002), Natural Science Foundation of Anhui Education Department (No. KJ2019A0774, KJ2019JD18), Major science and technology projects of Anhui Province (201903a05020027), Anhui Jianzhu University PhD Startup Fund (2019QDZ22, 2018QD59) and University Collaborative Innovation Project of Anhui province (GXXT-2019-017), WuHu Key Technology Major R&D Projects (No. 2020yf14), Research Fund for Postdoctoral Researchers in Anhui Province (2020B413).
Supporting information: Information is regarding the preparation and characterization of Oli and ILs and SEM images of PLA/PCL blends to determine the optimal blend ratio of PLA and PCL. The materials are available via the Internet at http://www.springer.com/13233.
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Wang, P., Gao, S., Chen, X. et al. Effect of PCL-b-PEG Oligomer Containing Ionic Elements on Phase Interfacial Properties and Aggregated Structure of PLA/PCL Blends. Macromol. Res. 30, 438–445 (2022). https://doi.org/10.1007/s13233-022-0058-0
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DOI: https://doi.org/10.1007/s13233-022-0058-0