Colloid and Polymer Science

, Volume 293, Issue 12, pp 3641–3648 | Cite as

Giant vesicles comprised of mixed amphiphilic poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid) diblock copolymers

  • Eri YoshidaEmail author
Short Communication


The morphological changes in giant vesicles were investigated using mixed amphiphilic diblock copolymers consisting of poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid), PMAA-b-P(MMA-r-MAA). The mixed copolymers had the identical length of the hydrophobic P(MMA-r-MAA) block and different lengths of the hydrophilic PMAA block; long-length PMAA (PMAA-L) was about three times longer than short-length PMAA (PMAA-S). Large contorted vesicles formed by the copolymer containing PMAA-S were transformed into various elliptical and spherical vesicles, followed by worm-like vesicles as the ratio of the PMAA-L-containing copolymer increased. It was found that the vesicular morphology of the mixed copolymers was determined by the average length of the PMAA blocks contained in the mixed copolymers based on the comparison with the spherical vesicles formed only by the copolymer containing the middle length of the PMAA block.


Giant vesicles Mixed amphiphilic diblock copolymers Poly(methacrylic acid)-block-poly(methyl methacrylate-random-methacrylic acid) Morphology control Average block length Elliptical vesicles Photopolymerization-induced self-assembly 



The author is thankful for a JSPS Grant-in-Aid for Scientific Research (Grant Number 25390003).


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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Environmental and Life SciencesToyohashi University of TechnologyToyohashiJapan

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