Long Wavelength Photosensitizers With Benzotriazole And Benzimidazole Skeletons For Cationic Polymerization

Autor:	Yilmaz, Seda
Jazyk:	angličtina
Rok vydání:	2011
Předmět:	QD Photochemistry 701-731 Benzimidazole benzotriazole photosensitizer cationic polymerization diaryliodonium salts epoxides photopolymerization.
Druh dokumentu:	M.S. Thesis
Popis:	Benzimidazole and benzotriazole derivatives, 4-(2,3-Dihydrothieno[3,4-b][1,4] dioxin-5-yl)-7-(2,3-dihydrothieno[3,4b][1,4]dioxin-7-yl)-2-benzyl-1H-benzo[d] imidazole (BIm-Ed), 2-benzyl-4,7-di(thiophen-2-yl)-2H-benzo[d] [1,2,3] triazole (BBTS), and 2-benzyl-4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2Hbenzo[ d] [1,2,3] triazole (BBTES) were employed as photosensitizers for diaryliodonium salt photoinitiators in cationic photopolymerization of various epoxide and vinyl ether monomers. Diphenyliodonium hexafluorophosphate (Ph2I+PF6¯ salt was used as the photoinitiator in this study. Extended conjugation and electron-rich moieties of the photosensitizers enabled the use of long wavelength UV and visible light emitting light sources in cationic photopolymerizations. Polymerizations were achieved at room temperature and monitored by optical pyrometry. Photopolymerization of a diepoxide monomer with ambient solar irradiation was examined.
Databáze:	Networked Digital Library of Theses & Dissertations
Externí odkaz:	http://etd.lib.metu.edu.tr/upload/12613457/index.pdf Zobrazit plný text záznamu