Multistage Reversible Tg Photomodulation and Hardening of Hydrazone-Containing Polymers

Sirun Yang, Jared D. Harris, Aloshious Lambai, Laura L. Jeliazkov, Gaurav Mohanty, Hao Zeng, Arri Priimagi, Ivan Aprahamian

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The glass transition temperature (Tg) of a series of polyacrylate- and polymethacrylate-based polymers having bistable hydrazone photoswitches as pendants increases upon photoisomerization. The ensuing photohardening of the polymeric network was corroborated using nanoindentation measurements. The bistability of the switch allowed us to lock-in and sustain multiple Tg values in the same polymeric material as a function of the hydrazone switch's Z/E isomer ratio, even at elevated temperatures.

Original languageEnglish
Pages (from-to)16348–16353
Number of pages6
JournalJournal of the American Chemical Society
Issue number40
Publication statusPublished - 2021
Publication typeA1 Journal article-refereed

Publication forum classification

  • Publication forum level 3

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry


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