期刊
JOURNAL OF FLUORINE CHEMISTRY
卷 131, 期 3, 页码 417-425出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jfluchem.2009.12.015
关键词
Miniemulsion polymerization; Fluorinated acrylate; Microwave irradiation; Microstructure; Kinetics
资金
- Key Projects in the National Science & Technology Pillar Program [2008BAC32803]
- Hong Kong Research Grants Council (RGG) [CityU 112306]
Fluoroacrylate copolymer miniemulsion was prepared by miniemulsion polymerization under microwave irradiation. The composition of the copolymer was determined by FTIR, DSC, H-1 NMR and F-19 NMR. The morphology, size, and size distribution of the latex particles as well as changes in the size during polymerization were characterized by TEM and photon correlation spectroscopy (PCS). The effects of kinetic parameters on the polymerization were evaluated. The particle size of latex underwent almost no change during microwave irradiation polymerization. The diameters of latex particles prepared by microwave irradiation were smaller and more monodispersed than those prepared by conventional heating and the latex had good centrifugal stability. Polymerization under microwave irradiation had a higher reaction rate and higher conversion than traditional heating. By using 10 wt% fluoromonomer, the surface energy of the latex film could be reduced from 27.24 mJ/m(2) (latex film of fluorine-free) to 17.59 mJ/m(2) and the decomposition temperature increased by 25 degrees C. (C) 2009 Elsevier B.V. All rights reserved.
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