Emulsion Copolymerization Kinetics of VDF/HFP
YU Yong-zhong, F New · Journal of Functional Polymers · 2008
The emulsion copolymerization kinetic of vinylidene fluoride(VDF)/ hexafluoropropene(HFP) was studied and the copolymerization rate was measured according to the pressure of reaction system.Results show that the emulsion copolymerization rate is proportional to the 0.05 power of the concentration of emulsifier(S).It is also found that emulsion copolymerization rate of VDF/HFP is proportional to the 0.31 and 1.59 power to the initial initiator concentration(I) and the total gaseous pressure of the reaction system(p) respectively.At last,the emulsion copolymerization rate of VDF/HFP at 80 ℃ is mainly determined with initial S,I and p,and can be expressed as r=1.11×10~(-4)S~(0.05)I~(0.31)p~(1.59) when stirring rate is 850 r/min.Meanwhile,the reactivity ration of two monomers is disscussed.