Abstract
Inorganic filler-filled polyurethane elastomer (PUE) is faced with problems such as cracking and functional structure failure under high-speed impact, which limits its application in the field of protection. Inspired by the secondary electrostatic effect of quadruple hydrogen bonds, a polymer containing quadruple hydrogen bonds (PHI) was composited with nano-CaCO3 to prepare a nano-reinforced filler (PUE-QHB@CaCO3). The composition, morphology and microstructure of the nano-reinforced filler were systemly characterized, and it was used to improve impact resistance and energy absorption of PUE. Compared with pure PUE, 4 wt% PUE-QHB@CaCO3 composite PUE simultaneously improves the maximum compressive modulus (190.70%), elastic modulus (186.81%), dynamic strength (24.32%) and energy absorption (23.33%) and reduces thermal weight loss rate (137.58%). The excellent mechanical properties exhibited by PUE-QHB@CaCO3 are not only attributed to the rigidity provided by nano-CaCO3 and the flexibility of PHI, but to the synergistic enhancement effect of the two in PUE.
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Acknowledgements
This work was financially supported by National Natural Science Foundation of China (12275231) and Hunan Provincial Natural Science Foundation of China (2020JJ4086). The authors thank the colleagues at SAXS beamlines (BL16B,BL19U) of Shanghai Synchrotron Radiation Facility for support and discussions; National Natural Science Foundation of China (52271117), Educational Commission of Hunan Province of China (20B579), High Technology Research and Development Program of Hunan Province of China (2022GK4038)
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ZZ and FQ contributed equally. ZZ was involved in writing—original draft, data curation, formal analysis, and investigation. FQ contributed to validation and investigation. XS was involved in data curation and software. BZ contributed to supervision, writing—review & editing. NZ was involved in visualization, validation, supervision, and writing—review & editing. FQ contributed to conceptualization, supervision. XO was involved in project administration and supervision. All authors have given approval to the final version of the manuscript.
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Zheng, Z., Qi, F., Sun, X. et al. Synergistic enhancement of mechanical properties and impact resistance of polyurethane elastomers by composite fillers containing quadruple hydrogen bonds and nano-CaCO3. J Mater Sci 58, 3582–3596 (2023). https://doi.org/10.1007/s10853-023-08198-9
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DOI: https://doi.org/10.1007/s10853-023-08198-9