Preparation of polymer nanoparticles with hierarchic structures

Hiroshi Yabu, T. Higuchi, Masatsugu Shimomura

Research output: Contribution to conferencePaperpeer-review


Block-copolymer nanoparticles with lamellar phase-separation structures have been prepared by a slow-precipitation process. Regular-sized poly(styrene-b-isoprene) nanoparticles are formed after evaporation of a good solvent from a polymer solution containing a non-volatile poor solvent and a volatile good solvent. Scanning transmission electron microscopy (STEM) reveals lamellae structures were formed in the nanoparticles. Energy dispersive X-ray photoelectron spectroscopy (EDX) reveals that these microstructures were formed by micro-phase separation of block-copolymers. Furthermore, the size of micro-phase separation structure can be controlled by changing the segment ratio between polystyrene and polyisoprene.

Original languageEnglish
Number of pages2
Publication statusPublished - 2005
Event54th SPSJ Symposium on Macromolecules - Yamagata, Japan
Duration: 2005 Sept 202005 Sept 22


Conference54th SPSJ Symposium on Macromolecules


  • Block-copolymer
  • Hierarchic structures
  • Micro phase separation
  • Nanoparticles
  • Self-organization


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