PREPARATION AND CHARACTERIZATION OF AFFINITY POLYMER BASIC MICROSPHERES BY SOAP-FREE EMULSION POLYMERIZATION

2009 ◽  
Vol 27 (01) ◽  
pp. 101 ◽  
Author(s):  
Jing-ning Lv ◽  
Shi-jiang Fang ◽  
Lei Chen
Keyword(s):  
Emulsion Polymerization ◽  
Soap Free Emulsion Polymerization

Preparation and characterization of poly(MMA-EGDMA-AMPS) microspheres by soap-free emulsion polymerization

2015 ◽  
Vol 35 (9) ◽  
pp. 847-857 ◽  
Author(s):  
Jingshui Xu ◽  
Denglong Chen ◽  
Xianglong Hu ◽  
Yangchuan Ke ◽  
Qian Zhou ◽  
...  
Keyword(s):  
Emulsion Polymerization ◽  
Water Uptake ◽  
Oil Recovery ◽  
Energy Dispersive Spectrometer ◽  
Petroleum Engineering ◽  
Yield Rate ◽  
Porous Reservoir ◽  
Soap Free Emulsion Polymerization ◽  
Enhance Oil Recovery

Abstract The poly(methyl methacrylate-ethylene glycol dimethacrylate-2-acrylamido-2-methylpropanesulfonic acid) [poly(MMA-EGDMA-AMPS)] microsphere was produced by a soap-free emulsion polymerization of MMA, EGDMA and AMPS. The chemical composition, morphology, particle size distribution and properties of the obtained microspheres were characterized by energy dispersive spectrometer (EDS), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), a laser particle analyzer and thermogravimetric analysis (TGA). Results showed that the microspheres had a high-quality spherical morphology, irrespective of the components, and their particle sizes mainly ranged from 10 μm to 70 μm. The microspheres were thermally stable up to 190°C. As the AMPS loading was increased, the synthetic yield rate decreased and the water uptake increased. The optimum synthetic yield rate and water uptake were obtained at a 2.0 wt% AMPS. In addition, the selected microspheres with a diameter of approximately 25 μm provided an effective plugging, and the plugging rate was up to 80%. This study demonstrated that the plugging behavior of microspheres was due to their deformation, migration and aggregating properties in the plugging process, which made them potential materials for modifying the porous reservoir to enhance oil recovery in petroleum engineering.

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