環状ジスルフィドの重合によるポリカテナンの合成と形状記憶特性 Synthesis of Polycatenane by Polymerization of Cyclic Disulfides and Shape-Memory Characteristics of the Polymer
This review describes thermal polymerization of cyclic disulfides without any initiators. Cyclic disulfides such as 1, 2-dithiane (DT) and 1, 4-dihydro-2, 3-benzodithine (XDS) can polymerize easily at reaction temperature of the melting points of the respective monomers to give a high molecular weight polymer determined by GPC. From the analyses of NMR and ESI-MS spectroscopies, the polymers obtained from the polymerization of cyclic disulfides were found to be a cyclic structure. Moreover, thermal and mechanical properties of the polymers, and decomposition behaviors of the polymers demonstrate that the polymers obtained from thermal polymerization of cyclic disulfides include a polycatenane structure. From polymerization of cyclic disulfides in the presence of cyclic poly (ethylene oxide), a polycatenane consisting of two different cyclic polymer was obtained. The polymers revealed characteristics as a shape-memory material.
日本ゴム協會誌 80(5), 191-196, 2007-05-15
THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN