UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone)

Chemical Research in Chinese Universities ›› 2012, Vol. 28 ›› Issue (1): 162-165.

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UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone)

CHEN Rui-chao, SUN Hui*, LI Ang, XU Guo-zhi

College of Materials Science and Mechanical Engineering, National Center for Quality Supervision and Test of Plastic Products, Beijing Technology and Business University, Beijing 100048, P. R. China

Received:2011-02-23 Revised:2011-04-17 Online:2012-01-25 Published:2011-12-27
Supported by:
Supported by the Scientific and Technological Development Programs of Beijing Municipal Education Commission, China (No.KM201010011004), the Scientific Research Foundation for the Returned Overseas Chinese Scholars, Ministry of Education, China, the 2011 Merit-based Research Funding for Picked Returned Overseas Scholars, Beijing Municipality, China and Beijing Technology and Business University Through a Research Project Approved for Undergraduates.

Abstract

Abstract: Photo-grafting of hydrophilic monomer was used to enhance the hydrophilicity of poly(ether ether ketone) (PEEK) with the aim of extending its applications to biological fields. PEEK sheets were surface modified by grafting of acrylamide(AAm) with ultraviolet(UV) irradiation in the presence or absence of benzophenone(BP). The effects of BP, irradiation time and monomer concentration on the surface wettability of PEEK were investigated. Characterization of modified PEEK using scanning electron microscopy(SEM), energy-disperse spectrometer(EDS) and water contact angle measurements shows that AAm was successfully grafted on PEEK surface both in presence and absence of BP. With the increase in irradiation time and monomer concentration, contact angles decrease to as low as 30°, demonstrating a significant improvement of surface hydrophilicity. In agreement with the decrease in contact angle, under identical conditions, the nitrogen concentration increases, suggesting the increase in grafting degree of the grafting polymerization. This investigation demonstrates a self-initiation of PEEK due to its BP-like structure in the backbone of the polymer. Though the graft polymerization proceeds more readily in the presence of BP, the self-initiated graft polymerization is clearly observed.

Key words: Poly(ether ether ketone)(PEEK), UV-grafting, Surface modification, Self-initiation, Graft polymerization

CHEN Rui-chao, SUN Hui, LI Ang, XU Guo-zhi. UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone)[J]. Chemical Research in Chinese Universities, 2012, 28(1): 162-165.

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UV-induced Self-initiated Graft Polymerization of Acrylamide onto Poly(ether ether ketone)

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