PreprintArticleVersion 2Preserved in Portico This version is not peer-reviewed
Non-covalent dynamic exchange mechanism of intrinsic self-healing at 20 °C in polyurethane due to interactions among carbonate groups of the soft segments
Version 1
: Received: 26 February 2024 / Approved: 26 February 2024 / Online: 26 February 2024 (16:44:35 CET)
Version 2
: Received: 5 March 2024 / Approved: 5 March 2024 / Online: 6 March 2024 (10:10:53 CET)
Paez-Amieva, Y.; Martín-Martínez, J.M. Dynamic Non-Covalent Exchange Intrinsic Self-Healing at 20 °C Mechanism of Polyurethane Induced by Interactions among Polycarbonate Soft Segments. Polymers2024, 16, 924.
Paez-Amieva, Y.; Martín-Martínez, J.M. Dynamic Non-Covalent Exchange Intrinsic Self-Healing at 20 °C Mechanism of Polyurethane Induced by Interactions among Polycarbonate Soft Segments. Polymers 2024, 16, 924.
Paez-Amieva, Y.; Martín-Martínez, J.M. Dynamic Non-Covalent Exchange Intrinsic Self-Healing at 20 °C Mechanism of Polyurethane Induced by Interactions among Polycarbonate Soft Segments. Polymers2024, 16, 924.
Paez-Amieva, Y.; Martín-Martínez, J.M. Dynamic Non-Covalent Exchange Intrinsic Self-Healing at 20 °C Mechanism of Polyurethane Induced by Interactions among Polycarbonate Soft Segments. Polymers 2024, 16, 924.
Abstract
Two polyurethanes (PUs) were similarly synthesized by reacting a cycloaliphatic isocyanate with 1,4 butanediol and two polyols of different nature (polyester, polycarbonate diol) with molecular weights of 1000 Da. The PU made with polycarbonate diol polyol (YCD) was the only showing intrinsic self-healing at 20 °C. For assessing the mechanism of intrinsic self-healing of YCD, a structural characterization by molecular weights determination, infrared and X-ray photoelectronic spectroscopies, differential scanning calorimetry, X-ray diffraction, thermal gravimetric analysis and dynamic mechanical thermal analysis was carried out. It was concluded that the self-healing at 20 °C of YCD was due to non-covalent dynamic exchange interactions among the carbonate groups of the soft segments. Therefore, the chemical nature of the polyol played a key role in developing PUs with intrinsic self-healing at 20 °C.
Chemistry and Materials Science, Polymers and Plastics
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
