Visible Light Pulsed-Laser Polymerization at 532 nm Employing a Julolidine Dye Photosensitizer Initiation System

Autor:	Thomas P. Davis, Gary D. Willett, Michael D. Zammit
Rok vydání:	1997
Předmět:	Polymers and Plastics Bulk polymerization Organic Chemistry Radical polymerization Analytical chemistry Laser Cyclopentanone Photochemistry law.invention Inorganic Chemistry chemistry.chemical_compound Photopolymer Polymerization chemistry law Materials Chemistry Julolidine Visible spectrum
Zdroj:	ResearcherID
ISSN:	1520-5835 0024-9297
DOI:	10.1021/ma970440j
Popis:	The free-radical propagation rate coefficient of methyl methacrylate has been measured using a new version of pulsed-laser polymerization employing a visible light wavelength (532 nm) generated by a frequency-doubled Nd:YAG laser. The initiation system adopted was made up from 2,2'- bis(2-chlorophenyl)-4,4',5,5'-tetraphenyl-1,2'-biimidazole), mercaptobenzoxazole, and 2,5-bis((1H,5H-benzo- (i,j)quinolizin-1-yl)methylene)cyclopentanone. The propagation rate coefficients obtained were consistent with values recommended as benchmark values by an IUPAC working party. A series of consistency checks was performed to ensure the validity of the experimental approach. The experimental technique described in this paper extends the pulsed-laser polymerization method to a whole new range of UV- absorbing monomers that were previously inaccessible to study.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bdf3326bb0f777923d8632e2eb218b1d https://doi.org/10.1021/ma970440j Zobrazit plný text záznamu