Li, M. X.; Rong, M. Z.; Zhang, M. Q. published an article in 2021. The article was titled 《Enhancement of mechanochemical self-blocking and self-healing of early minor damages in hyperbranched polyurethanes》, and you may find the article in eXPRESS Polymer Letters.Electric Literature of C3H9NO2 The information in the text is summarized as follows:
For more effective removal of the hidden troubles from early minor damages before their spreading out, hyperbranched polyurethane crosslinked by dioxyphenylalanine-Fe3+ (DOPA-Fe3+) and histidine-Zn2+ (His-Zn2+) coordination bonds is synthesized. By taking advantage of the cascading variation of the two types of metal-ligand complexations under the applied force, the growth of minor damages is firstly blocked, and then rehabilitation of the blocked damages takes place without manual intervention. Moreover, the exptl. results indicate that the specific structure of hyperbranched macromols., which possess plenty of functional groups and great mobility, benefits to construct a stronger network with rapid response than that derived from the linear macromols. As a result, the stress-induced micro-voids in the crosslinked hyperbranched polyurethane are much smaller, and its robustness is allowed to be maintained to a higher extent, which is consistent with the concept of timely repairing upon destruction. In the experiment, the researchers used 2-Aminopropane-1,3-diol(cas: 534-03-2Electric Literature of C3H9NO2)
2-Aminopropane-1,3-diol(cas: 534-03-2) belongs to anime.Typically the presence of an amine functional group is deduced by a combination of techniques, including mass spectrometry as well as NMR and IR spectroscopies. 1H NMR signals for amines disappear upon treatment of the sample with D2O. In their infrared spectrum primary amines exhibit two N-H bands, whereas secondary amines exhibit only one.Electric Literature of C3H9NO2
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