| POLYMERS Vol.59 No.8 |
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COVER STORY
Microreactor Technology as an Innovative Polymer Production Process |
| Growing Polymers: A Personal Account |
| Training for Three Years Later | Taichi IKEDA |
| <Abstract> In my research carrier, I have always encouraged myself by a Japanese proverb “Training for three years later” meaning that today's training will lead to great achievement after some years. |
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| Save the Earth with “Growing” Rubber | Hisakatsu HAMA |
| <Abstract> Using the precisely designed synthetic rubber as material of tyre is one of the solutions to save the earth from air pollution by reducing the fuel consumption. |
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| COVER STORY: Highlight Reviews |
| Controlled Polymerizations Using Microreactors | Aiichiro NAGAKI and Jun-ichi YOSHIDA |
| <Abstract> Polymer synthesis is one of the most fascinating fields in the application
of flow microreactor systems. There have been a great number of reports
on the use of flow microreactor systems for the additional polymerization
including cationic polymerization, anionic polymerization, radical polymerization
and the ring-opening polymerization. This article provides a brief outline
of polymer synthesis using flow microreactors with emphasis on controllability
of polymerization. Keywords: Microreactor / Fast Mixing / Temperature Control / Residence Time Control / Controlled Polymerization |
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| Polymer Beads Production Using Microreactor | Toru TORII |
| <Abstract> This paper reports on polymer beads production using droplet formation
in microchannel technique and microreactor. This technique has the following
characteristics like, for example, monodisperse droplets production (CV
< 5%), the wide control of diameter of the droplets, the very high formation
speed of several thousand per second. Droplets are produced at T junction
and cross junction. For the normal beads production, droplets were formed
in 128 parallelized microchannels with a production rate of 320 (g/h) and
a CV < 2%. Janus beads were also produced in microchannel. Core-shell
structured beads were made using double emulsion formation technique. This
technique has potential to produce functional beads in microreactors. Keywords: Janus Beads / Core-Shell Structured Beads / Microchannel / Droplet Formation |
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| Fabrication and Manipulation of Organic Materials by Using MEMS | Daisuke KIRIYA and Shoji TAKEUCHI |
| <Abstract> Recently, microfabrication of biological and synthetic materials have attracted
much attention by using microdevices. These microdevices are fabricated
by using a technique, termed MEMS (Micro Electro Mechanical Systems). This
review introduces recent advances of fabrication and manipulation techniques
of polymer, supramolecular and biological materials by using MEMS devices. Keywords: MEMS / Biomaterial / Supramolecular Hydrogel / Tissue Engineering |
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| Development of Solid-Phase Catalyst-Installed Microflow Reactors and Their Application to Cross-Coupling Reactions | Yoichi M. A. YAMADA |
| <Abstract> The development of catalyst-immobilized microflow reactors and their application
to cross-coupling and so forth are introduced. For installation of immobilized
catalysts, packing methods in a microreactor, a chemical modification method
at the wall of a microreactor, and our catalytic membrane installation
method at the interface of laminar flow in a microreactor are described. Keywords: Microreactor / Microflow / Catalysts / Convolution / Organic Syntheses / Monolith / Microtube |
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| COVER STORY:Topics and Products |
| Controllable Ring-Opening Polymerization in Microreactor | Masaya MIYAZAKI and Hideaki MAEDA |
| <Abstract> We used a microfluidic system for polymerization of amino acid N-carboxyanhydride.
The microreactor produced polymers with a narrow molecular weight distribution.
Also, the Mn of the polymer produced using the microreactor was simply
governed by the flow rate. These results indicated that the microreactor
is a useful tool for ring-opening polymerization reactions. Keywords: Microreactor / Micromixer / Ring-Opening Polymerization / N-Carboxyanhydride / Polyamino Acid |
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| Butadiene Polymerizations Using Microreactors | Akira MIYAZAWA |
| <Abstract> Microreactor-assisted activation of titanocenes with methylaluminoxane
resulted in an active homogenous polymerization catalyst for 1,3-butadiene.
The micro flow system, composed of several types of microreactors, was
able to promote several reaction steps like activation, initiation, propagation
and termination within one process. Keywords: Microreactor / Micro Flow System / Polybutadiene / Living Polymerization |
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| Synthesis of Functionalized Organic Compounds by Use of a Microreactor | Akihiro ORITA and Junzo OTERA |
| <Abstract> Compaction of a multi-step organic synthesis is one of the practical technologies
for the realization of effective and environmentally benign synthetic processes
because the whole procedure can be carried out by using a microreactor.
Herein are described the compaction of a synthetic process and the connected
organic synthetic steps by use of a microreactor. Keywords: Microreactor / Sulfone / Acetylene / One-pot / Antimicrobial Agent |
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| Twisting Ball Electronic Paper Display | Youichi TAKIZAWA and Takanori TAKAHASHI |
| <Abstract> The twisting ball display has been known as the first developed electronic
paper. However, it is extremely difficult to produce the particles suitable
for this device. We succeeded in developing a new manufacturing method
for Janus beads set in the twisting ball display by applying the droplet
formation in microchannel technique. Keywords: Janus Beads / Droplet Formation / Microchannel |
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| Front-Line Polymer Science |
| Folding Manipulation for Functional Biopolymer Design | Naohiko SHIMADA and Atsushi MARUYAMA |
| <Abstract> Folding of biomolecules such as proteins or nucleic acids is crucial for
their functions. Recently, design of functional peptides and proteins on
the basis of structure prediction has been reported. Nucleic acids are
also utilized to design functional materials with well-characterized nano-order
structures. Novel materials that change their structures and thereby function
upon external stimuli have been also reported. Riboregulators or DNA nanomachines
change the structure by external stimuli such as pH change, light irradiation
or addition of ligand and subsequently act as smart molecules. Chaperones
are proteins that assist biopolymer folding. Artificial chaperons are designed
and are applied to control protein and nucleic acid folding and functions. Keywords: Folding / Protein / Nucleic Acid / Bimolecular Fluorescence Complementation / Aptamer / Artificial Chaperon |
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