A new series of poly(perfluorohexylethyl methacrylate)-block-poly(ethylene oxide)-block-poly(perfluorohexylethyl methacrylate), PFMA-b-PEO-b-PFMA triblock copolymers has been synthesized by atom transfer radical polymerization using bifunctional PEO macroinitiators. The molecular structure of the block copolymers was confirmed by 1H NMR spectroscopy and SEC. X-ray scattering studies have been carried out to investigate their bulk properties. SAXS has shown cubic arrangement of spheres (bcc), hexagonally packed cylinders (hpc) and lamellar microdomain formation in the melt of triblock copolymers investigated, depending on composition. Crystallization was, however, found to destroy the ordered melt morphology and imposes a lamellar crystalline structure. WAXS, DSC and polarized light microscopy measurements confirmed the crystallization of PEO segments in block copolymers. Long PFMA blocks were found to have significant effect on PEO crystallization. Synthesis of triblock copolymers of EO and FMA by ATRP.
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Hussain et al. (2002) studied this question.
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