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This chapter describes the methodology of shear-rheo-optics which enables real-time and in situ simultaneous measurements of shear and normal stress, optical microscopy (OM), small-angle light scattering (SALS), light transmittance, and birefringenceBirefringence for exploration of dissipative structures in mesoscopic length scale developed in the nonequilibrium systems. We paid a special attention to design a versatile apparatus which would permit to measure shear and normal stress ranging from very low to very large one, and SALS and OM also covering large dynamic ranges and to measure rheo-optical properties under continuous shear, oscillatory shear, and step-up and step–down shear. For this purpose, one of the most reliable rheometersRheometer commercially available is modified to install a SALS apparatus and an OM without sacrificing the high quality as a rheometer. Data acquisitions of SALS and OM can be synchronized with a given strain phase under oscillatory shear flowsOscillatory shear flow, which enables strain-phase dissolved measurements of SALS and OM. The chapter describes details of the rheometerRheometer, shear SALSShear SALS, Shear OM, and temperature enclosureTemperature enclosure enabling a fine temperature control of specimens, both space-wise and time-wise, under cone-plate fixture, indispensable for investigation of critical phenomena under shear flow fields.

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Methodology

  • 章节

  • 发表日期：

    2026年

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  • Takeji Hashimoto

摘要

This chapter describes the methodology of shear-rheo-optics which enables real-time and in situ simultaneous measurements of shear and normal stress, optical microscopy (OM), small-angle light scattering (SALS), light transmittance, and birefringenceBirefringence for exploration of dissipative structures in mesoscopic length scale developed in the nonequilibrium systems. We paid a special attention to design a versatile apparatus which would permit to measure shear and normal stress ranging from very low to very large one, and SALS and OM also covering large dynamic ranges and to measure rheo-optical properties under continuous shear, oscillatory shear, and step-up and step–down shear. For this purpose, one of the most reliable rheometersRheometer commercially available is modified to install a SALS apparatus and an OM without sacrificing the high quality as a rheometer. Data acquisitions of SALS and OM can be synchronized with a given strain phase under oscillatory shear flowsOscillatory shear flow, which enables strain-phase dissolved measurements of SALS and OM. The chapter describes details of the rheometerRheometer, shear SALSShear SALS, Shear OM, and temperature enclosureTemperature enclosure enabling a fine temperature control of specimens, both space-wise and time-wise, under cone-plate fixture, indispensable for investigation of critical phenomena under shear flow fields.