Environmentally benign precipitation copolymerization of methacrylate ester and styrene to make polymeric microspheres in supercritical carbon dioxide |
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| Authors: | Donghui Zhang Kenji Mishima Kiyoshi Matsuyama Li Zhou Shubiao Zhang |
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| Affiliation: | 1. State Key libratory of Chemical Engineering, Chemical Engineering Research Center, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;2. Department of Chemical Engineering, Faculty of Engineering, Fukuoka University, Fukuoka 814‐0180, Japan;3. Department of Chemical Engineering, Dalian Nationalities University, Dalian 116600, People's Republic of China |
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| Abstract: | The polymeric microspheres were synthesized by the precipitation copolymerization of glycidyl methacrylate (GMA) with methacrylic acid(MAA) or 2‐hydoxyethyl methacrylate (2‐HEMA) containing styrene (ST) in SC‐CO2. Scanning electron microscopy (SEM) showed that the products were spherical microparticles, with the addition of MAA and/or 2‐HEMA as the monomer, with diameter of 0.2–2 μm. The effects of copolymerization pressure, temperature, and ratios of GMA/MAA, ST, and/or GMA/2‐HEMA, on the particle size and morphology were investigated in detail. A new experiment setup is proposed for the large amount of production, based on the rule of lower monomer concentration, more stable system, and better use of the present polymerization apparatus. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 2425–2431, 2007 |
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| Keywords: | polymeric microsphere supercritical carbon dioxide polymerization powder coating |
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