A Plasma-Initiated Graft Polymerization of Methyl Methacrylate in the Presence of a Reverse ATRP Catalyst
A plasma-initiated graft polymerization of methyl methacrylate (MMA) was carried out on the high-density polyethylene (HDPE) surface in the presence of the reverse atom transfer radical polymerization (RATRP) catalyst of CuCl2/2,2′-bipyridine (bpy). The polymerization kinetics presented a linear relation with polymerization time. A well-defined PMMA brush was fabricated on the surface, evidenced by the linear growth of molecular weights with conversions and narrow polymer dispersity (Ð = 1.31). Graft amounts were indicated to increase proportionally with the increase of conversions and molecular weights. Subsequently, a solvent-responsive surface was prepared by the block copolymerization of 2-hydroxyethyl methacrylate (HEMA) on the PMMA grafted surface. The polymerization is suggested to proceed via a RATRP mechanism, when plasma radicals could behave similarly as conventional radicals in forming dormant species.
KeywordsPlasma-initiated polymerization Reverse atom transfer radical polymerization Graft polymerization Methyl methacrylate Surface modification
The work was supported by National Basic Research Program of China (2009CB623404), National Natural Science Foundation of China (20776068) and Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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