POLYMERS　Vol.58　No.5

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COVER STORY Research Groups in SPSJ

Polymer Science and I: A Personal Account

To While Away the Idle Hours

Takashi UBUKATA

<Abstract>This essay traces my diverse pleasure through my research life in several laboratories.

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COVER STORY: Highlight Reviews

Research Group on Polymer Surface and Interface: the Growing Applications and the Challenges for the Future

Tomohisa NAKAMURA and Takashi NISHINO

<Abstract>The Research Group on Polymer Surface and Interface deals with subjects on surfaces and interfaces of polymers and related materials. It has been run by collaboration between researchers on preparing or modifying polymer surfaces and those on surface analysis. The committee members from academic field and industrial field are cooperating to provide timely information on polymer surface and interface and the place to exchange ideas for promoting research and development activities. Keywords: Polymer Surface / Interface / Functional Materials / Surface Analysis / Modifying Polymer Surfaces

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Research Group on Precisely Designed Network Polymer

Shunichi NUMATA

<Abstract>The research group on Precisely Designed network polymer has been founded to progress the science and technology of network polymers for the development of innovative polymer materials possessing precisely controlled network structures. Herein new trends of science and technology of network polymers are briefly introduced. Keywords: Network Polymer / Precise Structure Control / Research Group

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Research Group on Adhesion and Coatings

Noriyuki YONEZAWA

<Abstract>As one of the most important material technologies for industry and human life, adhesion and coatings have been made use of almost all solid daily goods, architectures, electronics, automobiles, bottles and cans of foods and so on. However, the advanced technology is urged by necessity in answer to the request such as reduction of vaporizable organic compounds (VOC) and elimination of carbon dioxide. The researchers in polymer sciences are invited to participate in research activities for the field of such complex material technology to solve the big problem by making full use of the polymer scientific insights leading the reform of the material paradigm. Keywords: Adhesion / Coating / Vaporizable Organic Compounds (VOC) / Material Paradigm

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Research Group on Materials for Fuel Cell: Contribution to the Research and Development of the Materials for Fuel Cells

Takahiko KODANI

<Abstract>Activity of the research group is to contribute to research and development of the future polymer materials relating to polymer electrolyte fuel cell and direct methanol fuel cell through seminars and mutual information exchange among the members, possibly giving a chance of fruitful joint research. Keywords: Fuel Cell / Polymer Electrolyte Fuel Cell / Direct Methanol Fuel Cell / Polymer Electrolyte Membrane / Materials for Fuel Cell

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Research Group on Polymers and Biosciences

Kazunari AKIYOSHI

<Abstract>This research group deals with basic bioscience of biopolymers and design of bio-inspired systems. Modification of biopolymers and bio-conjugation with functional polymers have been done for biotechnological and biomedical applications. Control of cellular function with bio-related systems is also a recent important topic. Keywords: Nucleic Acid / Protein / Polysaccharide / Lipid Assembly / Functionalized Biopolymer / Bio-Inspired System / Bio-Nanomachine / Cell Technology

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Research Group on Polymers for Microelectronics and Photonics

Hideyuki NAKANO

<Abstract>This research group was founded in 1991 and has been growing with the progress of electronics and information technologies. It covers the latest topics such as micro- and nano-fabrication processes, packaging technologies, photopolymers and resists, high thermo-durable functional materials such as photo-sensitive polyimide, and materials for photonics and other organic and inorganic materials for, e.g., 2-D and 3-D nano-fabrication. Keywords: IT / Microelectronics / Photonics / Lithography / Photopolymer / Resist / Nanotechnology

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Research Group on Photonics Polymers

Yasuhiro KOIKE

<Abstract>Photonics polymers have been widely used as materials for photonics devices such as optical disks, lenses, optical fibers, and optical films and light guide plates for displays. However, we think that potential of photonics polymers have not been fully extracted and discussion among researchers in the fields of chemistry, processing, photonics and electronics is important for further development of the filed of photonics polymers. This research group aims to enhance the discussion and develop human resources in this field. Keywords: Photonics Polymers / Plastic Optical Fiber / Display / Optical Disk / Fiber to the Display / Lens / Communication

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Research Group on Plastic Films

Katsuya ITO

<Abstract>Plastic films are widely used for packaging application in our life, and their application has been expanding with high quality and multi-functionality. The research group focuses on not only plain film itself but also film manufacturing, film converting technology like coating or surface treatment, raw materials suppliers, functional film manufacturing industries for FPD and nano-technology applications. Keyword: Plastic / Film / Stretching / Coating / Packaging / Flat Panel Display / Fuel Cell Multi Layer / Imaging / Gas Barrier

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Research Group on Inorganic Polymers

Kimihiro MATSUKAWA

<Abstract>“Research Group on Inorganic Polymers” intends discussing not only pure inorganic polymers but also the scientific area where polymers including “Inorganic Substance” are concerned. The activity of the research group will stimulate an information exchange and supply a hint for the development of new materials. Recently, organic-inorganic nano-hybrid materials have been mostly attracted for the advanced applications. Keywords: Inorganic Polymer / Organic-Inorganic Hybrid / Organometal / Ceramics / Nano-Functional Materials / Inorganic Nano-Structure

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Research Group on Supramolecules

Kimihisa YAMAMOTO

<Abstract>This research group was derived from Research Group on Macromolecular Complexes established in 1976, which had supplied wide information about macromolecular complexes. This research group was renamed to Research Group on Supramolecules on April first in 2006, commemorating the 30th anniversary of the founding. “Supramolecules” deserve much attention as new materials for advanced nanotechnologies and have received a great amount of scientific and technological interest for the next generation. Keywords: Supramolecules / Macromolecular Complexes / Metal Complex / Organic-Inorganic Hybrid Materials / Self-Assembly / Nano-Organized System / Super-Hierarchical Structures / Molecular Programming / Nano-Technology

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Research Group on Organic EL Materials and Devices

Junji KIDO

<Abstract>Organic EL devices have been extensively studied for large-size flat panel displays and general lighting. This research group provides important information on organic EL materials, devices and equipment and provides the members with opportunities to interact each other. Keywords: Organic Electroluminescence / Fluorescence / Phosphorescence / Charge Transport / Flat Panel Display / General Lighting / Vacuum Evaporation / Ink Jet Printing

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Front-Line Polymer Science

Double Network Hydrogel with High Modulus and Toughness: A Novel Material for Load-Bearing Soft Tissues

Jian Ping GONG

<Abstract>Hydrogels attract attention as excellent soft & wet materials. However, common hydrogels are mechanically too soft and brittle to be used as load-bearing materials. By mimicking the structure of the articular cartilage which is one of the native tough hydrogels, Double Network hydrogel (DN gel) with extremely high mechanical performance has been developed. DN gels, consisting of rigid and brittle polyelectrolyte network as the 1st component and soft and ductile neutral network as the 2nd component, exhibit 0.1-1 MPa of elastic modulus, 60 MPa of compressive fracture stress, 3000% of tensile strain, and 2500 J/m2 of fracture energy. Such a tough hydrogel has an excellent mechanical compatibility with load-bearing soft tissues such as articular cartilages. Keywords: Hydrogel / High Elasticity / High Strength / Double Network Gel / Toughness / Polyelectrolyte / Mechanical Compatibility / Artificial Cartilage

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Recent Development in Characterization and Physical Properties of Ring Polymers

Yutaka OHTA and Atsushi TAKANO

<Abstract>Although numerous works on physical properties of ring polymers were made for three decades, most of polymer samples used so far were not pure enough. Recently new HPLC technique with high resolution has provided rigorous characterization of rings. In this article, recent developments in characterization and physical properties of well-characterized ring polymers are described. Keywords: Ring Polymer / Solution Property / Bulk Property / Viscoelastic Property / Interdiffusion

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