| POLYMERS Vol.59 No.12 |
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COVER STORY
New Trends on the Polymer Chemistry of Adhesive Materials and Products |
| Growing Polymers: A Personal Account |
| Am I Still a Player ? | Atsushi NORO |
| <Abstract> This personal account describes how I spent several years in laboratories as a group member when I was a graduate student and later a postdoc. It also describes how I would like to behave or how I should play my role as an academic staff member in universities. |
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| Width and Depth | Masahiro FUJIOKA |
| <Abstract> Through the experience in some fields, I started to realize that width and depth of knowledge are necessary. I would like to engage in the development of the new product with impact. |
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| COVER STORY: Highlight Reviews |
| Adhesive Fractography | Yoshihiro YAMAZAKI |
| <Abstract> In
the process of peeling or detaching an adhesive, the adhesive can be
deformed. The beginning of the deformation is due to the instability
of uniform peeling (or detaching) motion caused by the pressure field
(or elastic field) of the adhesive (fingering instability). In many cases,
the deformed adhesive forms a variety of characteristic structures, like
e.g. a fibril structure in the probe tack test, and a tunnel structure
in the case of peeling of an adhesive tape. The stability and existence
of these structures are essential factors for the determination of the
peel force and its dynamical properties. Keywords: Fingering / Tack / Peeling / Cavity / Fibril / Tunnel |
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| Analysis of the Adhesion Process of Polymeric Materials Using Coarse-Grained Simulation | Hiroshi MORITA |
| <Abstract> This
report reviews the simulation studies of the adhesion of polymeric materials
using coarse-grained molecular dynamics simulation. The studies of the
adhesions between polymer films and between rubber particle and solid
substrate were highlighted. The former system can be treated as the analysis
of the fracture in the polymeric materials and the latter includes the
dynamics of the contact line. From our simulation results, the phenomena
can be analyzed from the point of view of the polymer chain dynamics
on a nano scale, and the availability of the analysis of the coarse-grained
simulation can be discussed. Keywords: Coarse-Grained Simulation / OCTA / Polymer Chain Dynamics / Adhesion Energy |
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| Surface and Interface Analysis for PSA Products | Masayoshi KAWABE |
| <Abstract> PSA
products show a multi layer structure exhibiting several different surfaces
and interfaces. Therefore, the control of the surface and interface of
PSA products is an important technology to keep a high product quality.
The surface and interface analysis technologies to confirm the state
of the product are a key issue. We describe the surface and interface
analysis in this section. Keywords: PSA / Multi Layer / Surface / Interface |
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| Recent Developments of Pressure Sensitive Adhesives in Environmental Protection: State and Trends | Takeyoshi CHIBATA |
| <Abstract> Today,
still, environmental protection issues and high performance-ization are
the continuous problems of pressure sensitive adhesives (PSAs). Therefore,
while the environmental problem has been taken seriously, as for the
technical development of PSAs, it focuses mainly on high performance.
In this article, throughout the life cycle of PSA products, it focuses
on the importance of solvent free PSAs and it explores the present state
of their development. Keywords: Environmental Protection Activities / Solventless Pressure Sensitive Adhesives / Eco-Products / Life Cycle / High Performance-Ization |
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| COVER STORY:Topics and Products |
| New Development of Waterborne Pressure-Sensitive Adhesive (PSA) | Shinya MIYATA |
| <Abstract> Many
acrylic polymers have been used for waterborne PSA, because those polymer
designing is flexible and easy. Recently, in accordance with expansion
of PSA’s application, PSA are required to have a wide-ranging high performance.
We introduce new waterborne PSA, which is a hybrid polymer of acrylic
and urethane and exhibits unique performance, not achieved by acrylic
polymer Keywords: Waterborne / PSA / Acryl / Urethane / Hybrid |
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| Pressure-Sensitive Adhesive for Polarizing Film Used for Liquid Crystal Display | Koji TOMITA |
| <Abstract> An
acrylic pressure-sensitive adhesive is used to stick the polarizing film
of liquid crystal displays together. This report introduces the demanded
performance and the design of this adhesive. Keywords: Liquid Crystal Display / Polarizing Film / Acrylic Pressure-Sensitive Adhesive / Endurance Performance / Light Leakage |
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| Development of Heat Resistant Self-Releasing Tape | Masateru FUKUOKA |
| <Abstract> The
improvement of the heat resistance of self-releasing tape has had a tremendous
effect on advanced semiconductor manufacturing. It was found that the
tape reported here has a heat resistance of around 150℃ and can be applied
to metal layer deposition and TSV (through silicone via) processing. Keywords: Acryl / Adhesive / Semiconductor |
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| Curing Type Pressure Sensitive Adhesive Tape which Combines UV-Polymerization with Heat Curing | Yukinori KOGA |
| <Abstract> Curing
type pressure sensitive adhesive is a functional material with both adhesive
and bonding characteristics. At this time, we would like to introduce
an environmentally friendly, curing type pressure sensitive adhesive
tape which combines UV-polymerization with heat curing. Keywords: Curing Type Adhesive / Pressure Sensitive Adhesive / UV-Polymerization / Heat Curing |
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| Development of Polymer Ultra-Thin Films (Nanosheets) in Biomedical Applications | Toshinori FUJIE and Shinji TAKEOKA |
| <Abstract> We
report unique adhesive properties of polymer ultra-thin films (nanosheets)
and their biomedical applications. A micro-scratch test indicates that
the nanosheet with tens-of-nm thickness has a sufficient physical adhesive
property, which lets us repair a visceral pleural defect without tissue adhesion. The nanosheet demonstrates the clinical benefits in the substitution of conventional surgical interventions. Keywords: Spincoating / Layer-by-Layer(LbL) / Polymer Ultra-Thin Film (Nanosheet) / Wound Dressing Material / Chitosan / Alginate / Adhesive Property / Micromechanical Property |
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| Front-Line Polymer Science |
| New Developments in Nanofiber | Masataka SUGIMOTO and Kiyohito KOYAMA |
| <Abstract> Nanofibers
have been widely studied for various fields such as cloth, photonics,
biology, medical application. We will review new developments in nanofiber
technology except electrospinning method in terms of the fabrication
method and the physical properties. Keywords: Nanofiber / Polymer / Conjugated Fiber / Carbon Nanotube / Melt Blown / Rotary Jet Spinning / GI-Plastic Optical Fiber |
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