Mechanical properties of the elastomer determine its applicability and industrial prospects, mechanical strength and ductility has been a trade-off where the elastic polymer, the challenge is how best to trace the modifier to greatly improve the traditional elastomeric materials Mechanical behavior. In recent years, due to the rise of the chemical mechanical bonds, supramolecular chemists developed a mechanical interlock structure into the polymer network to increase its mechanical ductility strategy, called \”Molecular pulley\” ([ . 123] Sci Adv 2018, 4, eaat7629;. Science 2017, 357, 279), i.e., by a mechanical bond between the polymer chains and a large ring body is maintained in the stretched elastomeric material the crosslinking process. However, how to simultaneously improve the mechanical strength and stretchability of challenges remain, because the conventional example only improves the stretchability of the material, the mechanical strength is limited. Recently, College of Chemistry and Molecular Engineering, East China University of Technology, Nobel scientist Professor Feilin Jia\’s Joint Research Center Qu Tai-fai team innovatively proposed a \”molecular zipper\” unique concept, while improving the mechanical strength and the tensile properties of the elastomer, made progress in the field of supramolecular polymeric elastomer. relevant outcomes to \”An Ultra-Strong and Highly Stretchable Polyurethane Elastomer Enabled by a Zipper-Like Ring-Sliding Effect\” in the title, published in the \” Advanced Materials \”. (DOI: 10.1002 / adma.202000345) which team will be prepared polyrotaxane skillfully incorporated crosslinker having hydrogen-rich domain deposited polyurethane network having both host-guest interactions and hydrogen bonding supramolecular polymer network . Using a very small amount (0.5 mol%) of the intended rotaxane polyurethane crosslinker can improve the mechanical strength of 950%, the elongation increases 650%, 4470% can improve the fracture. (FIG. 1) of this zippered slip ring sliding urethane mechanical properties the best currently reportedRing-based elastomer.
doctoral Shichen Yu, Dr. Zhang Qi Under the guidance of Professor Qu Tai-fai of complete, and has been Tian Academy of Sciences careful guidance. This work was supported by the National Natural Science Foundation of major projects, basic science centers, Shanghai and other major science and technology project funds, characterization work has been the strong support Analysis and Testing Center of East China University of Technology.