Polymerization of 2-hydroxyethyl methacrylate induced by azo compounds: Solvent effects

✍ Scribed by M.V. Encinas; E.A. Lissi; C. Martinez

• Book ID: 103076390
• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 376 KB
• Volume: 32
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(96)00045-6

✦ Synopsis

Aktraet-Tbe rate of polymerization of 2-hydroxyethyl methacrylate in aqueous media, photoinitiated by aliphatic axe compounds, is proportional to the monomer concentration and the square root of the photosensitizer concentration. These results are indicative of a simple photoinitiation mechanism, in which the monomer does not interfere with the photoinitiator cleavage and the primary radicals add quantitatively to the monomer. The polymerization rate has been measured for a series of solvents and solvent mixtures. The rate correlates with the cohesive energy of the co-solvent, being faster in monomer/water mixtures. The high rates in these systems are explained in terms of the polymer conformation and solvophobic effects.