Soft Materials Physics Laboratory

T. Ikehara

Takayuki Ikehara

Office: 23-722 Ext.: 3849


12/2000, Ph.D., The University of Tokyo

T. Kataoka

Toshiyuki Kataoka
(Assistant Professor)

Laboratory: 23-721 Ext.: 3848


03/2007, Ph.D., The University of Tokyo

Research Field

Physical Properties of Polymers, Polymer Physics.

Research Overview

Investigating nano- and macroscopic structures, physical properties, and dynamics in multi-component polymeric systems.

Research Subjects

  • 1.Correlation between molecular mobility and dynamics in multi-component polymeric systems.
  • 2.Analyses and applications of nano-structures in polymer brushes, i.e. layers grafted onto solid substrates.
  • 3.Development of functional polymeric materials based on the fundamental researches indicated above.


Polymer blends and block copolymers

Proton exchange membranes based on block copolymers

The relationship between the structures and physical properties of polymer brushes, polymer blends, and block copolymers with crystalline and biodegradable components are investigated based on the structural formation process, crystallization dynamics, and phase behavior. The results of our fundamental research are applied to developing functional polymeric materials.

Proton exchange membranes, which can be used in direct methanol fuel cells, are developed based on block copolymers composed of crystalline and proton-conducting blocks. They are designed to exhibit co-continuous structures of the two functional compounds over a wide composition range. Such structures are expected to produce high mechanical stability, high proton conductivity, and low methanol crossover.

  • 1) “Diverse morphological formations and lamellar dimensions of poly (ε-caprolactone) crystals in the monolayers grafted onto solid substrates”, Polymer, vol. 112, pp. 53-60 (2017).
  • 2) “Crystalline layered morphology in the phase-separated blend of poly(butylene succinate) and poly(ethylene succinate),” Polymer Journal, vol. 47(9), pp. 645–648 (2015).
  • 3) “Effects of melt annealing on the miscibility and crystallization of poly(butylene succinate)/poly(ethylene succinate) blends,” Polymer Journal, vol. 46(7), pp. 405–411 (2014).
  • 4) “Relation between the helical twist and S-shaped cross section of the lamellar crystals of polyethylene,” Scientific Reports, vol. 3, p. 1444 (2013). doi:10.1038/srep01444.
Affiliated Academic Organizations

T. Ikehara: The Society of Polymer Science, Japan.

T. Kataoka: The Society of Polymer Science, Japan.

Current members
◯ Professors: 1 ◯ Assistant Professors: 1 ◯ Postgraduates: 4
◯ Undergraduates: 12

Facilities: Atomic force microscope, polarized optical microscope, phase contrast optical microscope, pulsed NMR, differential scanning calorimeter, gel permeation chromatograph, rheometer.