Variation of the morphology of a carboxylated polymer film by alkali treatment
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- Okubo, M., Ito, A., Okada, M. et al. Colloid Polym Sci (2002) 280: 574. doi:10.1007/s00396-001-0644-1
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The variation of the morphology of a carboxylated polymer film cast from tetrahydrofuran solution, in which styrene/methacrylic acid copolymer particles produced by emulsion copolymerization were dissolved, before and after alkali treatment at temperatures higher than the glass-transition temperature was observed with a scanning electron microscope. The treated film had a porous structure. This result provides important evidence for the formation mechanism of the multihollow structure in submicron-sized, carboxylated polymer emulsion particles by the stepwise alkali/acid method and the alkali/cooling method which the authors proposed.