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Volume 60, Issue 6
Displaying 51-54 of 54 articles from this issue
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Atsushi Nagasawa, Takahiro Kitano, Tatsufumi Watanabe, [in Japanese]2004 Volume 60 Issue 6 Pages 183-187
Published: 2004
Released on J-STAGE: February 15, 2006
JOURNAL FREE ACCESSWe studied the surface modification technology using photosensitive material for control of surface free energy. This photosensitive material is composed of both photo-curable resin and surface modifier. The surface modification phenomena can be controlled by the medium having different surface free energy. In the medium of the high surface free energy, such as water, photosensitive material is modified to be high surface free energy after curing. Whereas, in the medium of the low surface free energy such as air, photosensitive material is modified to be low free surface energy. We calculated surface free energy and analyzed chemical composition of surface by ESCA. As a result, we explained that these surface modification phenomena were caused by the migration of surface modifier into photo reactive resin. Finally, we applied these surface modification phenomena to precision printing technology and micro processing technology in order to fabricate optical devices.View full abstractDownload PDF (471K) -
Yukie Kawazu, Toshiyuki Watanabe, Kenro Totani, Takeshi Ogawa2004 Volume 60 Issue 6 Pages 188-192
Published: 2004
Released on J-STAGE: February 15, 2006
JOURNAL FREE ACCESSPolydiacethylene copolymers having different polymer backbone were synthesized consisting of same chromophore, such as dispersed red 19. Effects of polymer backbone on second-order nonlinear optical coefficients were investigated. The thin films of polydiacethylene were prepared by coating on soda-lime glass substrate and poled by corona poling at elevating temperature. The second-order NLO coefficients d33 of the films were measured by in situ second-harmonic generation measurements and Maker fringe measurements. The d33/d31 were deduced as 6.0 and 2.3 for polymer having p-cinnamate backbone and polymer having m-cinnamate at 1064 nm fundamental wavelength, respectively. The orientation order parameter is strongly depends on polymer backbone. To understand the temperature effects to the orientation thermal stability of polydiacethylene, the decay of second harmonic generation intensity were measured. The depoling experimental results showed that the orientation stability of p-cinnamate backbone is higher than that of m-cinnamate backbone. The order parameter and SHG decay of copolymer were also investigated.View full abstractDownload PDF (420K) -
Gyeong Bok Jung, Masashi Yoshida, [in Japanese], Ryushi Fujimura, Sato ...2004 Volume 60 Issue 6 Pages 193-197
Published: 2004
Released on J-STAGE: February 15, 2006
JOURNAL FREE ACCESSWe studied the electric-field-induced birefringence, the photoconductivity and the photorefractive properties of photorefractive polymer composites based on N,N'-diphenyl-N,N'-bis(3-methylphenyl)-[1,1'-biphenyl]- 4,4'-diamine (TPD). Photorefractive response rate is improved in TPD-based photorefractive polymer, composed of TPD, polystyrene (PS), 4-butoxy- 3-propyl-1-(4'-nitrophenylazo)benzene (m3p4) and C60. We obtained the photorefractive response time of as fast as 3.2 ms (@I = 837 mW/cm2, E = 40 V/ m). The photoconductivity of TPD-based photorefractive polymer is found to be greater than that of the PVK-based one.View full abstractDownload PDF (732K) -
Yuko Maeda, Yoshiki Koshiyama, Yasuko Shimoi, Noriyuki Yonezawa, Kenji ...2004 Volume 60 Issue 6 Pages 198-202
Published: 2004
Released on J-STAGE: February 15, 2006
JOURNAL FREE ACCESSLuminescent cyano-substituted distyrylbenzene derivatives were synthesized via Knoevenagel condensation reactions. By using these compounds as initiators, a series of rod-coil polymers were synthesized by the atom transfer radical polymerization of methacrylate containing hole transporting carbazole moiety in high yields except the initiator with dicyanovinyl end groups. Molecular weight up to 37000 and polydispersity indices not exceeding 1.6 were obtained. Photoluminescent spectra revealed the aggregation of the rod parts in the solid state. The rod parts containing fluorinated alkyl groups were further aggregated by the heat treatment. The contact angle measurements suggested the fluoro alkyl groups dominated the film surface in the aggregation process. Microporous films with the open pore diameter of 1.1 or 3.7 m were fabricated by casting the polymer solution under a moist air flow. Transmission spectrum showed the dip originated from the periodic arrangement of micropores.View full abstractDownload PDF (200K)