メカノイオン電子移動反応に基づく有機高分子粉体の摩擦帯電機構

抄録

We have focused on a triboelectricity as a surface phenomenon. The frictional action between two polymers should induce the scissions of carbon-carbon bond of polymer main chain on the friction surface. On this point of view, a frictional experiment was designed as a mechanical fracture experiment of polymers in a vacuum in the dark at 77 K. The mechanical fracture induced homogeneous and heterogeneous scissions of carbon-carbon bond of polymer main chain, and produced macro-neutral free radicals （called mechano radicals ; R ● ） and macro-anionic species （called mechano anions ; R^－）.
We proposed that a generation mechanism of triboelectrificity between two polymers A and B was based on an electron transfer reaction from the RA－ having low electron release potential （P_re（R_A）） as an electron donor to the R_B ● having high electron affinity （E_a（R_B ● ）） as an electron acceptor on the friction surface, and resulted in polymer A having positive charge and polymer B having negative charge. A sign and amount of charges can be evaluated from a chemical formula of polymer based on our proposed mechanism.