Dimerization of polyanthracene in polymethylmethacrylate for reversible light-induced surface modification
The dimerization of polyanthracene and its monomer anthracene was characterized, and the kinetics of dimer breaking was studied through contact angle measurements upon exposure to ultraviolet light. UV-vis spectroscopy studies showed that dimerization and breaking wavelengths for anthracene and polyanthracene were in the ultraviolet region of the spectrum. Formation of the dimer, which corresponds to increase in surface hydrophobicity, occurred at 302 nm for polyanthracene, and 310 - 340 nm for anthracene. Breaking of the dimer, which corresponds to increase in surface hydrophilicity, occured at 224 nm for polyanthracene, and 240 - 260 nm for the anthracene monomer. Absence of absorption peaks in the visible region suggest material stability under visible light. The polymer material coated on a polymethylmethacrylate substrate exhibited increase in hydrophilicity over time upon exposure to UV-C light.
By submitting their manuscript to the Samahang Pisika ng Pilipinas (SPP) for consideration, the Authors warrant that their work is original, does not infringe on existing copyrights, and is not under active consideration for publication elsewhere.
Upon acceptance of their manuscript, the Authors further agree to grant SPP the non-exclusive, worldwide, and royalty-free rights to record, edit, copy, reproduce, publish, distribute, and use all or part of the manuscript for any purpose, in any media now existing or developed in the future, either individually or as part of a collection.
All other associated economic and moral rights as granted by the Intellectual Property Code of the Philippines are maintained by the Authors.