Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.



Photoresponsive Gels Based on Cyclic/Linear Polymers: Efficient Synthesis and Property Difference

Abstract

Cyclic architectures of polymers have shown unique properties or improved performance due to the lack of chain ends. Herein, we describe the first example of azobenzene-induced photoresponsive gels based on cyclic polymers made by azide–alkyne and boronic acid-diol “click” reaction. The properties of cyclic gels with different cyclic polymer sizes were investigated by comparing with those of linear ones made by the polymeric linear precursors. It was observed that the cyclic topology exerted larger influence on the properties of the gels. And more significant influences of topology were found from the cyclic gel with smaller cyclic polymer size. Rheological measurements revealed that the cyclic gels have higher storage modulus (G′) and loss modulus (G″) than the linear counterparts, indicating that the former is stiffer than the latter. The gel-to-sol transition and photo-healing of the gels induced by azobenzene were observed by irradiation with UV/Vis light. Nevertheless, the cyclic gel with the smaller cyclic polymer size showed a dull photo-responsive behavior due to the restrictions of transform of trans-cis isomer of azobenzene moieties imposed by cyclic topology. The results in this work showed that network mesh space, intramolecular and intermolecular interactions induced by macrocyclic architecture finally endow the functional cyclic gels unique properties.

Back to tab navigation

Supplementary files

Publication details

The article was received on 01 Mar 2019, accepted on 03 May 2019 and first published on 03 May 2019


Article type: Paper
DOI: 10.1039/C9PY00334G
Polym. Chem., 2019, Accepted Manuscript

  •   Request permissions

    Photoresponsive Gels Based on Cyclic/Linear Polymers: Efficient Synthesis and Property Difference

    J. Yu, K. Li, L. Li, L. Liu, Y. Zhou, Z. Zhang, M. Guo, N. Zhou and X. Zhu, Polym. Chem., 2019, Accepted Manuscript , DOI: 10.1039/C9PY00334G

Search articles by author

Spotlight

Advertisements