Photoexpansion of Biobased Polyesters: Mechanism Analysis by Time-Resolved Measurements of an Amorphous Polycinnamate Hard Film
نویسندگان
چکیده
Cinnamate-based polyesters were synthesized, including poly(4-hydroxycinnamic acid), poly(4-hydroxy-3-methoxycinnamic poly(3-hydroxycinnamic acid) (P3HCA), and hyperbranched poly(3,4-dihydroxycinnamic (PdHCA). These materials further processed into hard dry membranes by casting underwent photoreactions ultraviolet (UV) light. The photodeformation behavior of the linear polyester containing with cinnamate derivatives in main chain was observed macroscopically microscopically. PdHCA P3HCA amorphous exhibited photodeformations. surface visibly contracts, which is a typically phenomenon photoresponsive polymers; however, showed unique photoexpansion behavior. Time-resolution infrared spectroscopy film revealed trans-to-cis isomerism polymer chains that bent convexly as result UV-irradiated regions. Furthermore, photomasking created micropattern on film, supported mechanism film.
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ژورنال
عنوان ژورنال: ACS Applied Materials & Interfaces
سال: 2021
ISSN: ['1944-8244', '1944-8252']
DOI: https://doi.org/10.1021/acsami.0c22922