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Li J.,Jiangsu Polytechnic University | Sun Z.,Jiangsu Polytechnic University | Zhen Y.,Jiangsu Polytechnic University | Ren Q.,Jiangsu Polytechnic University | And 4 more authors.
Journal of Polymer Research | Year: 2010

We used atom transfer radical polymerization to synthesize poly(butyl acrylate) (PBA) and then substituted the bromo end group with N-ethanol methyl amine to obtain the hydroxyl (OH) end-capped poly(butyl acrylate). A compound of PBA with Mn of about 500 was first synthesized and used as a model compound to investigate the substitution reaction conditions of bromo end group with N-ethanol methyl amine. The OH functionality over 0.8 was obtained when the model compound was reacted with N-ethanol methyl amine under the reaction temperature of 90°C for about 24 h. A poly(butyl acrylate) diol ofMn 2000 with OH functionality of about 1.76 was obtained and characterized by infrared spectrum (IR), hydrogen nuclear magnetic resonance (HNMR) spectra, gel permeation chromatography (GPC) and thermo gravimetric analysis (TGA).

Hiraiwa Y.,Hiroshima University | Oshitari T.,Soken Chemical and Engineering Co. | Fukui K.,Hiroshima University | Yamamoto T.,Hiroshima University | Yoshida H.,Hiroshima University
Separation and Purification Technology | Year: 2013

The effect on particle separation performance using a free air inflow cyclone at the upper plate was examined by experiment and CFD simulation. The 50% cut size with the free air inflow cyclone is smaller than that without the free air inflow cyclone under the same pressure drop condition. The optimum flow ratio defined by the free air inflow rate to main flow rate is 0.4. The four slit inlet cyclone shows better particle separation performance compared to other types. For a flow ratio greater than 0.4, the 50% cut size increases again due to the decrease of the main flow rate. From the simulation results, the rotational and downward flow velocity in the upper cylindrical part with the free air inflow cyclone is greater than that without the free air inflow cyclone. In the case of the free air inflow cyclone, a particle trajectory simulation indicated that particles entering the cyclone tend to move to the circular wall region smoothly. The experimental and simulation results indicate higher particle separation performance for the free air inflow cyclone. © 2013 Published by Elsevier B.V.

Gao Q.,Shinshu University | Meguro H.,Soken Chemical and Engineering Co. | Okamoto S.,Soken Chemical and Engineering Co. | Kimura M.,Shinshu University
Langmuir | Year: 2012

In this letter, we report a simple approach to fabricating scalable flexible tactile sensors using a nanofiber assembly of regioregular poly(3-hexylthiophene) (P3HT). Uniform P3HT nanofibers are obtained through a continuous electrospinning process using a homogeneous solution of high-molecular-weight P3HT. The P3HT nanofibers are oriented by collecting them on a rotating drum collector. Small physical inputs into the self-standing P3HT nanofiber assemblies give rise to additional contact among neighboring nanofibers, which results in decreased contact resistance in directions orthogonal to the nanofiber orientation. The P3HT nanofiber assemblies could detect pressure changes and bending angles by monitoring the resistance changes, and the sensor responses were repeatable. © 2012 American Chemical Society.

Yasuda T.,Japan National Institute of Materials Science | Meguro H.,Soken Chemical and Engineering Co. | Okamoto S.,Soken Chemical and Engineering Co. | Han L.,Japan National Institute of Materials Science
Polymer Journal | Year: 2013

A study was conducted to demonstrate the fabrication of bulk-heterojunction (BHJ) organic photovoltaic (OPV) cells fabricated using a high-viscosity solution of poly(3-hexylthiophene) (P3HT) with extremely high molecular weight Mw. It was demonstrated that the amount of both donor and acceptor materials in the fabrication of BHJ OPVs could be strongly reduced using a high-viscosity P3HT solution with an Mw of 680 900. The solution concentration was changed to maintain the same thickness for all BHJ layers under constant spin coating conditions. Current density-voltage (J-V) curves were measured using an ADCMT 6244 DC Voltage Current Source/Monitor under simulated AM 1.5 solar light irradiation at 100 mW cm-2. Viscosity measurements for each P3HT solution were carried out using a sine-wave vibro viscometer. Surface morphology was also studied using an atomic force microscope and UV-vis absorption spectra were recorded on a U-3010 spectrometer.

Tamba S.,Kobe University | Tanaka S.,Kobe University | Okubo Y.,Kobe University | Meguro H.,Soken Chemical and Engineering Co. | And 2 more authors.
Chemistry Letters | Year: 2011

Poly(3-hexylthiophene) was synthesized by the polycondensation of 2-bromo-3-hexylthiophene with a nickel catalyst and (2,2,6,6- tetramethylpiperidin-1-yl)magnesium. The polymerization proceeded at room temperature in a highly regioregular manner. © 2011 The Chemical Society of Japan.

Suto Y.,Soken Chemical and Engineering Co. | Mizawa T.,Soken Chemical and Engineering Co. | Mizukami Y.,Soken Chemical and Engineering Co. | Takahashi T.,Soken Chemical and Engineering Co.
Journal of Photopolymer Science and Technology | Year: 2013

Nanoimprint technology (NIT) has been developed as a method of microfabrication technology. Roll-to-roll process has been applied to NIT, because high throughput and cost reduction are essential to achieve practical mass-production. In this study, we developed a film mold made of self-developed UV-curable resin and applied the film mold to the UV roll-to-roll nanoimprinting process. The film mold exhibited several superior properties, excellent mold releasability, high transmittance in the UV-Vis range and appropriate mechanical properties. Obtained transcribed products had high transcription accuracy without remarkable defects even after 1500 m imprinting. Pattern sizes of transcribed products were almost constant at line speeds ranging from 1 to 5 m/min. Moreover, various nano and micro patterned transcribed products were obtained as well. These results indicate the developed film mold is adequate for practical mass-production by applying to UV roll-to-roll nanoimprinting process. © 2013SPST.

Mizawa T.,Soken Chemical and Engineering Co.
Kobunshi | Year: 2012

"FleFimo®" is a film mold for nano and micro imprinting which was developed at Soken Chemical & engineering Co., Ltd. We can make it in a maximum size of 850 mm × 600 mm. © 2012 The Society of Polymer Science, Japan.

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