Kinetics of PEGMA grafted from Si(100) surface to form polymer brush

Abstract

In this paper, the kinetics of poly(ethylene glycol) monomethacrylate (PEGMA) grafted from Si(100) surface to generate poly(poly(ethylene glycol) monomethacrylate) [P(PEGMA)] polymer brush was investigated. A covalently bonded (Si-C bonded) 4-vinyl benzyl chloride (VBC) monolayer (Si-VBC surface) was formed via UV induced coupling of the vinyl group of VBC with the Si-H surface. Then, PEGMA was grafted from Si(100) surface via surface initiated atom transfer radical polymerisation with the aid of the monolayer VBC. The modified silicon surfaces were characterised by X-ray photoelectron spectroscopy, ellipsometry and telescopic goniometre. The presence of grafted P(PEGMA) on the Si-VBC surface was confirmed by X-ray photoelectron spectroscopy and ellipsometry measurements. The results suggested that the chain growth from Si-VBC surface is consistent with a ‘controlled' or ‘living' process.

Keywords

SILICON SURFACE ATRP P(PEGMA)BRUSH

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