The Functionalization Of Hyperbranched Polytriazoles:Self-healing And Metal Bonding Properties

It's truism that the last decades have witnessed the development of Cu(I)-catalyzed and Metal-Free Click Polymerization,and their usage as powerful tools for the preparation of linear and hyperbranched polytriazoles.Thanks to their unique topological structure,hyperbranched polytriazoles have been applied in diverse areas such as aggregation-induced emission(AIE),biology,non-linear optics,self-healing materials and metal adhesive.In this way,the development of novel functionalized hyperbranched polytriazoles has great scientific and practical significance.In the reported two main self-healing systems,intrinsic self-healing system has attracted much attention because of its unique advantages.Reversible covalent bonds and non-covalent bonds systems have both been developed sufficiently.However,as a newborn strategy of intrinsic self-healing system,the irreversible covalent bond system is far from being developed and has considerable potential to explore.In this thesis,hyperbranched poly(aroxycarbonyltriazole)s were prepared by our developed metal-free click polymerization.The advantages of this method can be concluded as: monomers can be synthesized directly via commercial source by one-step reaction;polymers can be readily achieved under heating,and no worry about the residual catalyst;at the same time,thanks to their excellent processibility and film-forming ability,high quality self-standing films could be obtained by casting.In addition,we systematically studied the self-healing and metal bonding properties of hyperbranched poly(aroxycarbonyltriazole)s,The optimum self-healing condition and bonding-and-curing condition as well as the repeatability were confirmed.And hyperbranched poly(aroxycarbonyltriazole)s also showed great self-healing and metal bonding properties at room temperature and elevated temperature.