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Photosynthesis of polymer networks with controlled properties by dimerization of cinnamoyl groups
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SYSNO ASEP 0544634 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Photosynthesis of polymer networks with controlled properties by dimerization of cinnamoyl groups Author(s) Gadek, Magdalena (UMCH-V)
Strachota, Beata (UMCH-V) RID
Matějka, Libor (UMCH-V) RIDSource Title Polymer International. - : Wiley - ISSN 0959-8103
Roč. 70, č. 9 (2021), s. 1225-1233Number of pages 9 s. Language eng - English Country GB - United Kingdom Keywords photocrosslinking ; cinnamate groups ; photodimerization Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA17-13103S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000612144900001 EID SCOPUS 85099746028 DOI 10.1002/pi.6185 Annotation Photosensitive monomers/polymers/copolymers containing a variable amount of cinnamoyl (Ci) groups ranging from 3 up to 480 per molecule were synthesized. These precursors were photocrosslinked by irradiation with UV light of wavelength 320–380 nm via the photodimerization of the Ci units. The evolution of conversion, gel fraction, modulus and Tg during irradiation was followed. Two types of photosensitive systems were studied: (i) a blend of photosensitive precursors of different functionality fCi and (ii) copolymers with a different content of Ci units and Tg. The control of the precursors' structure and composition as well as photocuring time period make it possible to finely tune the properties of the formed polymer network films. The prepared photocrosslinked networks show a very broad range of thermomechanical properties with Tg from −25 °C up to 135 °C and moduli over a range of three orders of magnitude. © 2021 Society of Chemical Industry Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2022 Electronic address https://onlinelibrary.wiley.com/doi/10.1002/pi.6185
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