

FOLLOWUS
a.Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
b.Department of Bioengineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
c.College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
d.School of medicine, Shaoxing University, Shaoxing 312000, China
e.School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
f.Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, China
Jiaxi.Cui@uestc.edu.cn
Received:16 March 2022,
Revised:2022-4-6,
Accepted:20 April 2022,
Online First:17 June 2022,
Published:01 November 2022
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Xiong, X. H.; Xue, L. L.; Wang, S.; Zhao, S. F.; Guo, X.; Li, M.; Cui, J. X. In situ variation of interpenetrating polymer network topology using a photolabile connector. Chinese J. Polym. Sci. 2022, 40, 1317–1322
Xin-Hong Xiong, Lu-Lu Xue, Sheng Wang, et al.
Xiong, X. H.; Xue, L. L.; Wang, S.; Zhao, S. F.; Guo, X.; Li, M.; Cui, J. X. In situ variation of interpenetrating polymer network topology using a photolabile connector. Chinese J. Polym. Sci. 2022, 40, 1317–1322 DOI: 10.1007/s10118-022-2755-8.
Xin-Hong Xiong, Lu-Lu Xue, Sheng Wang, et al.
A light wavelength-selective approach to in situ regulate the network topology from c-IPN to d-IPN by
in situ
grafting and disconnecting polymer chains from the inimer sites. The change in topology from c-IPN to d-IPN made a negligible contribution to materials’ mechanical properties.
A photo-controlled approach is developed to regulate the interpenetrating polymer network (IPN) topology by varying the connecting structure between the first and second networks. The approach is based on multifunctional inimer (Vinyl-
o
NB-Br) possessing three moieties
i.e.
an acrylate-based double bond for incorporation within a polymer network
a Br group for grafting polymerization to get connect-IPN (c-IPN)
and an
o
-nitrobenzyl spacer for photocleaving to convert the c-IPN to disconnected-IPN (d-IPN) with UV light irradiation. Such design allows for finely controlling the connection degree between two networks. A systematic study on the mechanical property of a series of samples with different connection degrees thus can be conducted. The results reveal that decreasing the connecting degree between two networks of IPN made a negligible contribution to materials’ mechanical properties.
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