On August 31, 2019, Fan, Cheng-Jie; Huang, Zi-Chun; Li, Bei; Xiao, Wen-Xia; Zheng, En; Yang, Ke-Ke; Wang, Yu-Zhong published an article.Formula: C6H8O3 The title of the article was A robust self-healing polyurethane elastomer: From H-bonds and stacking interactions to well-defined microphase morphology. And the article contained the following:
Supramol. interactions have been extensively considered in the field of self-healing materials due to their excellent reversibility and sensitive responsiveness to environmental stimuli. However, development of a polymeric material with good mech. performance as well as self-healing capacity is very challenging. In this study, we report a robust self-healing polyurethane (PU) elastomer polypropylene glycol-2-amino-5-(2- hydroxyethyl)-6-methylpyrimidin-4-ol (PPG-mUPy) by integrating ureidopyrimidone (UPy) motifs with a PPG segment with a well-defined architecture and microphase morphol. To balance the self-healing capacity and mech. performance, a thermal-triggered switch of H-bonding is introduced. The quadruple H-bonded UPy dimeric moieties in the backbone induce phase separation to form a hard domain as well as enable further aggregation into microcrystals by virtue of the stacking interactions, which are stable in ambient temperature This feature endows the PU with high mech. strength. Meanwhile, a high healing efficiency can be realized, when the reversibility of the H-bond was unlocked from the stacking at higher temperature An optimized sample PPG1000-mUPy50% with a good balance of mech. performance (20.62 MPa of tensile strength) and healing efficiency (93% in tensile strength) was achieved. This strategy will provide a new idea for developing robust self-healing polymers. The experimental process involved the reaction of 3-Acetyldihydrofuran-2(3H)-one(cas: 517-23-7).Formula: C6H8O3
The Article related to self healing polyurethane elastomer microphase morphol, Pharmaceuticals: Pharmaceutics and other aspects.Formula: C6H8O3
Referemce:
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