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Initiated Chemical Vapor Deposition and Light‐Responsive Cross‐Linking of Poly(vinyl cinnamate) Thin Films
Author(s) -
Petruczok Christy D.,
Armagan Efe,
Ince Gozde Ozaydin,
Gleason Karen K.
Publication year - 2014
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201400130
Subject(s) - copolymer , materials science , chemical vapor deposition , thin film , polymerization , polymer chemistry , deposition (geology) , chemical engineering , chemical modification , swelling , radical polymerization , photochemistry , polymer , chemistry , nanotechnology , composite material , paleontology , sediment , engineering , biology
The first vapor‐phase deposition of poly(vinyl cinnamate) (PVCin) is reported. Initiated chemical vapor deposition (iCVD) is used to synthesize PVCin thin films with an average thickness of 100 nm. Free radical polymerization and cyclization reactions compete during the deposition process, with approximately 45% of the repeat units undergoing cyclization. Exposure to UV light ( λ = 254 nm) induces dimerization (cross‐linking) of the PVCin, which is quantified using spectroscopic techniques. Approximately 90% of the free cinnamate moieties are dimerized at a UV dose of 300 mJ cm −2 . PVCin is also incorporated into a copolymer with N ‐isopropylacrylamide, which exhibits a characteristic change in hydrophilicity with temperature. The copolymer is selectively cross‐linked through a mask, and reversible swelling of patterns with 30 μm resolution is demonstrated by submerging the film in water.