Dynamic interaction in polyurethane containing the boronic ester groups

Abstract

Dynamic interaction can impart useful functionality to the polymer. Boronic esters are known to form a variety of dynamic-covalent bonds by reacting with diols. Dynamic-covalent bonds can be readily controlled by temperature or the addition of water. Boronic ester-containing molecules have been noted in a number of self-healing applications. The self-healing material restores their function by restoring the physical damage, fracture, cracks and prevents destruction. When boronic ester-containing molecules exposed to moisture in the atmosphere, hydrolysis occurs on the surface and healing is caused by re-esterification. Here in, the polyurethane-based polymers were synthesized with boronic ester compounds and Polytetrahydrofuran (PTMEG). The restored property of boronic esters was observed under ambient conditions. The re-esterification experiments of boronic esters were carried out in surface force apparatus (SFA) through water and dry environments. These bulk materials confirmed by mechanical testing, polymer properties.