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Citation: ZHANG Kai, FU Qiang, HUANG Yu-hong, ZHOU De-hui. Study on Acrylonitrile Graft Copolymerization on Surfaces of Polystyrene Microspheres[J]. Acta Physico-Chimica Sinica, ;2005, 21(06): 673-676. doi: 10.3866/PKU.WHXB20050619 shu

Study on Acrylonitrile Graft Copolymerization on Surfaces of Polystyrene Microspheres

1.
College of Polymer Science and Engineering, Sichuan University, Chengdu 610065; Structure Mechanics Institute, China Academy of Engineering Physics, Mianyang 621900

Received Date: 13 October 2004
Available Online: 15 June 2005

Functional polymer microspheres with micron size, due to their excellent properties such as small size, narrow size distribution and kinds of functional groups, have gained broad applications in biomedicine, catalyst, bioengineering, separating engineering and information technology. In the present paper, uniform polystyrene (PS) microspheres with average size of 3.85 μm were prepared by dispersion polymerization. Through adding second monomer acrylonitrile (AN) to initiate dispersion copolymerization, uniform P(St-AN) copolymer microspheres with average size of 4.02 μm were prepared. These two kinds of polymer microspheres were characterized by morphology and size analysis, FT-IR and DSC. The results showed that acrylonitrile groups were uniformly grafted on the surfaces of polystyrene microspheres and enhanced the polarity of the surfaces. For the P(St-AN) copolymer micro-spheres, average diameter D=4.02 μm, standard deviation δ=0.30 μm, coefficient of variation ε=0.075 and glass transition temperature Tg=86.5 ℃.
- Polystyrene microspheres;Surface graft polymerization; Acrylonitrile;Dispersion copolymerization
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