期刊
POLYMERS
卷 8, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/polym8060217
关键词
slide-ring gel; polyrotaxane; volume phase transition; small-angle X-ray scattering
资金
- ImPACT Program of Council for Science, Technology and Innovation (Cabinet Office, Government of Japan) of Japan [20221005, 22750099]
- Grants-in-Aid for Scientific Research [22750099, 20221005] Funding Source: KAKEN
The volume phase transition of slide-ring gels with freely-movable cross-linking junctions was investigated. Ionic chemical gels with fixed cross-linking junctions undergo volume phase transitions when they have higher than the critical degree of ionization. However, the experimentally-observed critical ionization value for slide-ring gels is much higher than theoretical values for chemical gels. This difference indicates that the volume phase transition is significantly suppressed in slide-ring gels. The mesoscale structure at various swollen or shrunken states was also investigated by small angle X-ray scattering. Changes in the scattering patterns with shrinking slide-ring gels suggest microphase separation due to the sliding of cyclic molecules threaded along the axis of the polymer chains, which may suppress the volume phase transition. In addition, slide-ring gels absorbed/desorbed greater than equilibrium volumes in the shrinking/swelling processes and showed slow dynamics; these observations are also related to their sliding properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据