Modification of the guest polymer ends efficiently and substantially decreases the density of the threaded rings. The minimized ring density drastically facilitates chain sliding through the cross-links in polyrotaxane gels. This molecular design is like regulating the “pressure” of the rings confined in the interlocked architecture, which counteracts the sliding.
K. Kato, Y. Okabe, Y. Okazumi and K. Ito, Chem. Commun., 2015, 51, 16180 DOI: 10.1039/C5CC07122D
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