The poly(HEMA-co-MMA-g-PMMA) graft copolymer was prepared with a poly(methyl methacrylate) (PMMA) macromonomer, 2-hydroxyethyl methacrylate (HEMA), and methyl methacrylate (MMA), and its application as a dispersant for the nonaqueous phase dispersion polymerization of polystyrene (PST) was investigated. Monodisperse PST particles were obtained with two-dimensionally tailored graft copolymers, with the number of grafted chains controlled and the polar component (HEMA) in the backbone chains balanced. As for the reactor, a stirred vessel with moderate agitation yielded uniform polymer particles, whereas sealed glass ampules with an overturning motion yielded broader size distributions. Increasing the polarity of the solvent in the continuous phase yielded smaller polymer particles with a gradual deterioration of monodispersity. Uniform polymer particles with a coefficient of variation of less than 6% were obtained up to 30 wt % solid contents.
The synthesis and characterization of poly(ethylene oxide)-b-poly(4-butyltriphenylamine)-b-(polyethylene oxide) triblock copolymers (PEO-b-PBTPA-b-PEO) with different block ratio are described. The optical properties of block copolymers were investigated by UV–vis absorption, and photoluminescence (PL) spectroscopy. From atomic force microscopy (AFM) observation of the annealed thin films of block copolymers, microphase-separated morphology was observed.
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