2022 年 59 巻 4 号 p. 178-183
Surface chemical modifications of nanoparticles at solid state in vacuum at extremely low temperature without catalyst and solvent are shown. Mechanical destruction of polymer in vacuum at 77 K produced a naked-activated-mechano-radical which was induced by homogeneous scission of covalent bond composed of polymer main chain and a naked-activated-mechano-anion and a naked-activated-mechano-cation which were induced by heterogeneous scission of covalent bond. Each was tethered on the fresh surface produced by the mechanical destruction. It initiated radical polymerization or cationic polymerization, produced a block copolymer and resulted in surface modification by the block copolymer. Another surface modification was performed by a novel covalent bond formation between naked-activated-mechano-anion and naked-activated-mechano-cation due to physical contact.
