关键词:

细乳液聚合, 含氟预聚物, 助稳定剂

Abstract:

The random copolymer (PSF) of styrene and dodecafluoroheptyl methacrylate (G04) was used as the sole co-stabilizer in styrene mini-emulsion polymerization.The effects of different masses of PSF, different fluorine contents of PSF on the conversion, the rate of the polymerization (R_p) and the diameter of droplets and the number of particles were investigated.The results showed that when fluorine content increased from 0 to 34.9%, the conversion of the polymerization increased from 67.5% to 80.1%, and R_p increased from 0.75×10^-2 mol·L^-1·min^-1 to 1.74×10^-2 mol·L^-1·min^-1.The fluorine content of PSF had little effect on the diameter of droplets, but it had an obvious effect on the number of particles in the polymerization.When the fluorine content of PSF increased from 0 to 34.9%, the number of particles per liter in the mini-emulsion system increased from 1.83×10¹⁶ to 2.07×10¹⁶.The mechanism of PSF as the sole co-stabilizer in styrene mini-emulsion polymerization was analyzed.

Key words:

细乳液聚合, 含氟预聚物, 助稳定剂