Studies on Graft-polymerization of Polystyrene Surface by Plasma Technology

Chem. J. Chinese Universities ›› 2009, Vol. 30 ›› Issue (7): 1365.

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Studies on Graft-polymerization of Polystyrene Surface by Plasma Technology

WAN Hai-Yan, WEI Yan-Lin, ZHAO Bao-Ming, CHEN Ya-Shao*

Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi′an 710062, China

Received:2008-10-27 Online:2009-07-10 Published:2009-07-10
Contact: CHEN Ya-Shao. E-mail: yschen@snnu.edu.cn
Supported by:
国家自然科学基金(批准号: 10675078)资助.

Abstract

Abstract:

Polystyrene(PS) was pretreated by O₂ plasma, then N-vinylpyrrolidone(NVP) was graft-poly-merized on PS surface in the Ar plasma environment. The effect of O₂ plasma pretreatment on surface free energy of PS was investigated by means of contact angle(CA) and surface free energy(SE) measurements. As the result, the optimum conditions of O₂ plasma pretreatment on PS surface were power 50 W, pressure 40 Pa and time 3 min. The surface composition and properties of the modified PS between pre- and post O₂ plasma treatment and graft polymerization were studied by ATR-FTIR, XPS, and DCA measurement. The results show that the NVP is successfully graft-polymerized on PS surface by plasma technology and the hydrophilicity of the modified PS surface markedly increased. The PS surface graft-polymerized was easily spreaded by water due to the increase of polar group and roughness. Further, the receding angle decreased obviously and the contact angle hysteresis was significant because of the reconstruction of the polymer chain on the PS surface.

Key words: Polystyrene; N-vinylpyrrolidone; Plasma; Surface free energy; Contact angle hysteresis

TrendMD:

WAN Hai-Yan, WEI Yan-Lin, ZHAO Bao-Ming, CHEN Ya-Shao*. Studies on Graft-polymerization of Polystyrene Surface by Plasma Technology[J]. Chem. J. Chinese Universities, 2009, 30(7): 1365.

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Studies on Graft-polymerization of Polystyrene Surface by Plasma Technology

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