Photopolymerization of Methyl Methacrylate Sensitized by Tris(2,2′-bipyridine)iron(III)

✍ Scribed by Goswami, Aradhana; Baruah, Shashi D.

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 248 KB
• Volume: 43
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/(sici)1097-0126(199705)43:1<22::aid-pi744>3.0.co;2-7

✦ Synopsis

The photopolymerization of methyl methacrylate (MMA) sensitized by tris(2,2@-bipyridine)iron(III) complex, was studied at 35¡C in the [Fe(bpy) 3 ]3`, presence of an electron donor, triethylamine (TEA) with UV radiation of wavelength 254 nm. The initial rate of polymerization, shows a linear dependence R p , on [MMA] with an exponential value of 1É18 ^0É04.

varies linearly with the R p square root of the photosensitizer concentration up to 2É00 ] 10~4 mol l~1, and above this concentration, decreases with the increase of photosensitizer con-R p centration. The rate of polymerization is not a †ected by the concentration of the co-initiator, [TEA]. A suitable mechanism for the reaction is proposed to explain the kinetics of the reaction.