Abstract
AbstractThe polymerization of acrylamide, in ethylene glycol, induced by visible light, with methylene blue–triethanolamine as the sensitizing system, was found to follow a steadystate kinetic scheme after an induction period. The rate was proportional to the half power of the absorbed light intensity and to the second power of the initial monomer concentration. In an experimentally convenient range of dye concentration the rate increased with the dye concentration. The molecular weights of the polymers were in the range of 3.0 × 104–2.5 × 105; they were insensitive to the absorbed light intensity; they increased with the initial monomer concentration and decreased with the initial dye concentration. The induction period was inversely proportional to the first power of the light intensity. Polymerization in the ethylene glycol systems was found to proceed at considerably faster speed than in the aqueous systems. The faster polymerization was attributed primarily to the fact that methylene blue at all concentrations employed existed principally in the monomeric form in the ethylene glycol systems. New methylene blue N–triethanolamine and methylene green–triethanolamine also were investigated as the sensitizing systems for the polymerization of acrylamide in ethylene glycol. Similar results as with methylene blue–triethanolamine were obtained.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
