POLY 117 |
| The goal of this research is to prepare crosslinked poly(2-ethylhexyl methacrylate-co-chloromethylstyrene) (2-EHMA-co-VBC) colloids dispersed in fluorinated solvents by emulsion and dispersion polymerizations. For this purpose, we prepared 2-ethylhexyl methacrylate copolymers using the semifluorinated vinyl monomers (1H,1H,7H-dodecafluoroheptyl methacrylate (DDFHM), 1H,1H,5H-octafluoropentyl methacrylate (OFPM), 1H,1H,2H,2H-perfluorodecyl methacrylate (PFDM)) or functional polyperfluoroethers (poly(tetrafluoroethylene oxide-co-difluoromethylene oxide) α,ω-diol, poly(tetrafluoroethylene oxide-co-difluoromethylene oxide) α,ω-diol bis(2,3-dihydroxypropylether)) in nonafluorobutyl methyl ether (HFE-7100) or nonafluorobutyl ethyl ether (HFE-7200) with AIBN as an initiator. EHMA dispersions in HFE-7200 using OFPM and PFDM gave dried foamy polymers whereas DDFHM gave gummy polymer. Solution polymerization of EHMA with OFPM in CDCl3 at 50 oC showed that OPFM was 1.5 times more reactive than EHMA. All of these dispersions were stable for 1-3 h during polymerization, and dynamic light scattering showed increase in particle size from 300 nm to 570-590 nm. Solid EHMA polymers were characterized using IR spectra and elemental analysis. |
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General Papers: Functional Materials
6:00 PM-8:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster
Division of Polymer Chemistry |