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Two Routes Towards Photoinitiator‐Free Photopolymerization in Miniemulsion: Acrylate Self‐Initiation and Photoactive Surfactant |
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| Authors: | Pablo A. Hoijemberg Abraham Chemtob Céline Croutxé‐Barghorn |
| Affiliation: | 1. Laboratory of Photochemistry and Chemical Engineering, ENSCMu, University of Haute‐Alsace, 3 rue Alfred Werner 68093 Mulhouse Cedex, France;2. Wright and Rieman Laboratories, Department of Chemistry and Chemical Biology, Rutgers, The State University of New Jersey, New Brunswick, NJ 08903, USA |
| Abstract: | Two novel photoinitiator‐free approaches to photopolymerize acrylic monomers with a conventional Hg lamp starting from an acrylates monomer miniemulsion are investigated. In one system the acrylate nanodroplet reaction is self‐initiated and in the other the use of a photoactive diphenyl ether surfactant yields phenyl and phenoxyl initiating radicals upon UV irradiation. Photopolymerization kinetics are monitored in situ by real‐time Fourier transform near infrared spectroscopy (RT‐FTNIR) and the colloidal properties are systematically investigated by dynamic light scattering (DLS). The up‐scaling of these PI‐free miniemulsion photopolymerizations is carried out in an annular photoreactor. |
| Keywords: | emulsion polymerization nanoparticles photopolymerization radical polymerization surfactants |