화학공학소재연구정보센터
Journal of Polymer Science Part A: Polymer Chemistry, Vol.40, No.21, 3634-3643, 2002
Synthesis and polymerization of fluorinated monomers bearing a reactive lateral group. XII. Copolymerization of vinylidene fluoride with 2,3,3-trifluoroprop-2-enol
An improved synthesis of 2,3,3-trifluoroprop-2-enol (FA1) and its copolymerization in solution with vinylidene fluoride (VDF, or 1,1-difluoroethylene) initiated by tert-butyl peroxypivalate are presented. A new synthesis of FA1, with NaH and lithium diisopropylamine as bases, from 2,2,3,3-tetrafluoropropanol is described. A series of nine copolymerization reactions were investigated from initial [VDF](0)/[FA1](0) molar ratios of 9.1/90.9 to 94.2/5.8. The copolymer compositions were calculated via F-19 NMR spectroscopy. From the Tidwell-Mortimer method, the reactivity ratios of both comonomers were determined (r(FAI) = 0.11 +/- 0.22 and r(VDF) = 0.83 +/- 0.77 at 50degreesC), and they showed an azeotropic point. Alfrey and Price's Q and e values of FA1. were calculated to be 0.0178 (from Q(VDF) = 0.008), 0.039 (from Q(VDF) = 0.015), and 0.275 (from Q(VDF) = 0.036) and 2.74 (vs e(VDF) = 1.20), 2.04 (vs e(VDF) = 0.50), and 1.94 (vs e(VDF) = 0.4), respectively, and they indicated that FA1 is an electron-accepting monomer.