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How low can you go? Polybenzoxazines can display surface free energies which are even lower than that of pure poly(tetrafluoroethylene). The contact angles and surface free energies were monitored during the polymerizations (see graph for an example). These materials are cheaper to prepare and easier to process than fluoropolymers.

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of poly(vinylphenol-block-methyl methacrylate) copolymer by atom transfer radical polymerization Experimental Section Materials. The methyl methacrylate (MMA, 99 %) was distilled from calcium hydride and the 4-acetoxystyrene (AS, 95 %) was used as received without any purified procedure. Copper (I) bromide (CuBr) was stirred continuously in glacical acetic acid overnight, filtered, and then rised with absolute ethanol under a blanket of argon, and dried under vacuum at 80 °C for three days. The solvent, xylenes, was distilled prior to use. Amberlite IR-120 (H form) cation exchange resin, N,N,N',N',N''-pentamethyldiethylenetriamine (PMDETA) was used as received and (1-bromoethyl)benzene was used as initiator. The syntheses of PMMA-Br, PMMA-b-PAS and PMMA-b-PVPh were shown in Scheme 1. Preparation of PMMA-Br Macroinitiator. A typical polymerization is as follows: CuBr (1 mmol) was placed into a dry 100 mL round-bottom flask equipped with a stirrer bar. Deoxygenated xylenes (25 mL), MMA (100 mmol) and ligand (1 mmol) were added sequentially and the solution was stirred for 60 min to form the Cu complex. The initiator (1 mmol) was then added. This whole process took place in a nitrogen-filled dry box. The reaction mixture turned dark green immediately and became progressively more viscous. Upon completion of the reaction controlled at 80 °C for 12 hr, the mixture was diluted with five-fold of tetrahydrofuran (THF) and stirred with of Amberlite