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6 results on '"Hiroshi Orihara"'

2. Micropatterning in Nematic Liquid Crystals: A General Control Strategy to Micropattern Topological Defects in Nematic Liquid Crystals Using Ionically Charged Dielectric Surface (Adv. Mater. Interfaces 11/2021)

Author

Hiroshi Orihara, Yuji Sasaki, Junnosuke Takahashi, Ryota Mikami, Takuho Kikkawa, and Shunsuke Yokokawa

Subjects
Materials science, Mechanics of Materials, Liquid crystal, Chemical physics, Mechanical Engineering, Pattern formation, Surface modification, Dielectric surface, Micropatterning, Topological defect
Published
2021

4. Liquid Crystals: Polymer‐Stabilized Micropixelated Liquid Crystals with Tunable Optical Properties Fabricated by Double Templating (Adv. Mater. 37/2017)

Author

Yuji Sasaki, Shuji Fujii, Shin Sakane, Reo Amano, Hiroshi Orihara, Fumito Araoka, Motoshi Ueda, and Khoa V. Le

Subjects
chemistry.chemical_classification, Materials science, chemistry, Mechanics of Materials, Liquid crystal, Mechanical Engineering, General Materials Science, Nanotechnology, Polymer, Molecular imprinting
Published
2017

6. Immiscible polymer blend electrorheological fluids: Composition dependence

Author

Masao Doi, Akio Inoue, Tomohiko Kawasaki, and Hiroshi Orihara

Subjects
chemistry.chemical_classification, Materials science, Polymers and Plastics, Polydimethylsiloxane, Composition dependence, General Chemistry, Polymer, Miscibility, Surfaces, Coatings and Films, Electrorheological fluid, chemistry.chemical_compound, chemistry, Structural change, Rheology, Materials Chemistry, Polymer blend, Composite material
Abstract

We investigated the composition dependence of the electrorheological properties of immiscible polymer blends which consist of liquid crystalline polymers (LCPs) and polydimethylsiloxane (DMS). We used two different kinds of LCPs, designated as A and B polymers. We observed that for a fixed ratio of an LCP and DMS (LCP:DMS = 2:1) the electrorheological properties change from type I to type II as the fraction of the A polymer is reduced. Microscopic observations indicate that the change in the electrorheological properties is associated with the structural change; in type I, LCP droplets are dispersed in DMS, while in type II, DMS droplets are dispersed and, furthermore, that the structural change is associated with the miscibility between DMS and the LCPs; the A polymer is partially miscible with DMS, while the B polymer is hardly miscible with DMS. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 3673–3680, 2002

Published
2002

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