Reversible Photo-Cross-linking of Polyvinyl Alcohol Containing Thymine

Autor:	Yoshiaki Inaki, Hiroyasu Hiratsuka
Rok vydání:	2000
Předmět:	chemistry.chemical_classification integumentary system Polymers and Plastics Hydrogen bond Organic Chemistry Acetal Uracil Polymer Photochemistry Polyvinyl alcohol Reversible reaction Thymine chemistry.chemical_compound chemistry Materials Chemistry Solubility
Zdroj:	Journal of Photopolymer Science and Technology. 13:739-744
ISSN:	1349-6336 0914-9244
DOI:	10.2494/photopolymer.13.739
Popis:	Water-soluble polyvinyl alcohol (PVA) was modified by thymine derivatives, which gave reversibly photodimer by UV irradiation. Photo-cross-linking of the polymer (PVA-Thy) was carried out in film state on quartz plate by irradiation at 280nm.PVA containing thymine had good sensitivity compared with uracil. Photodimerization of the ester derivative was faster than the acetal derivatives, but the sensitivity was lower because solubility in water was high. Reverse reaction of photodimerization was almost complete, but the reversibility of solubility was not complete. This fact indicated that hydrogen bonding between PVA was formed during photodimerization reactions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9d53f68bb8405eb2997d26bfda271d17 https://doi.org/10.2494/photopolymer.13.739 Zobrazit plný text záznamu