Two Routes Towards Photoinitiator-Free Photopolymerization in Miniemulsion: Acrylate Self-Initiation and Photoactive Surfactant
✍ Scribed by Pablo A. Hoijemberg; Abraham Chemtob; Céline Croutxé-Barghorn
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 601 KB
- Volume
- 212
- Category
- Article
- ISSN
- 1022-1352
No coin nor oath required. For personal study only.
✦ Synopsis
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.