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Preparation of Hole Transporting Polymer Having Triphenylamine Moieties
( Hisaya Sato ) 한국공업화학회 2001 한국공업화학회 연구논문 초록집 Vol.2001 No.-
New classes of hole transport polymers were prepared through copolymerization of N-(4-methylphenyl)-diphenylamine (MTPA) or N,N’-diphenyl-N,N'-bis(4-methylphenyl)-benzidine (MTPD) with benzaldehyde, bis(bromomethyl)arene, or 1,4-divinylbenzene. Polymers with molecular weight higher than 10,000 were obtained in high yield in the presence of acid catalysts. The resulting polymers are soluble in the conventional solvents and exhibit high thermal stability. It was confirmed by H-1 NMR spectroscopy that TPA or TPD units are linked with comonomers mainly at the p-positions of unsubstituted phenyl ring. UV-vis spectroscopy and cyclic voltammetry showed that the optical and electrochemical properties of these polymers were almost identical as the starting triphenylamine derivatives. Furthermore, two-layer EL devices were fabricated, in which polymers were spin cast onto the ITO anode as a hole transport layer and Alq was vapor-deposited as a light-emitting and electron transport layer.
Some Open Issues in Continuous-Time IQC Approach to A Class of Networked Cotrol Systems
Hisaya Fujioka 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
Motivated by the widespread use of networked and embedded control systems, stability of sampled-data feedback control systems with uncertainly time-varying sampling intervals is considered as an application of the IQC stability theory. Known results are reviewed and a few open issues are pose.
Conformity in Heart Rate Variability under Online Game without Conversations
Hisaya Tanaka,Tatsuya Kawahara 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
This paper describes the coaction-indexes based on physiological experiments in online-works such as tele-working or online-gaming in the Net. We think the important factor on online works is sharing strategies and situations. If the strategies are shared in the work, it is considered that self-regard operations decreases, and/or the conformities are seen in the physiological response by the situation acknowledgment. We experimented in the online action game. Two players had to be limited the conversation, and to acknowledge the strategy only by information onthe screen. We measured the frequency of player"s switch button as a behavioral indicator. Moreover, the heartbeatfluctuation was measured as a physiology index. The frequency of the button has decreased by the progress of the gamefrom the experiment. Moreover, it has been understood that consideration is shared from the conformity of the heartbeat fluctuation by the same scene.
Adsorption Mode High Performance Liquid Chromatography of Polymers
( Hisaya Sato ) 한국공업화학회 1991 한국공업화학회 연구논문 초록집 Vol.1991 No.0
Polymer samples were separated by high performance liquid chromatography using adsorption mode. When a combination of non-polar eluent and polar station phase or of polar eluent and non-polar eluent is used with gradient elution of increasing a good solvent, copolymers, such as styrene-methyl mathacrylate and styrent-butadiene copolymers, were separated by chemical composition, polybutadienes were separated by isomeric structure. With this mode molecular weight effect is negligible. For polar stationary phase, crosslinked acrylonitrile on acrylamide gel was used and styrene or octadecy1 methactylate gel was used for non-polar one. When other combinations were used, polymers were separated by GPC mode or phase separation mechanism with greater molecular weight dependence.
Sato, Hisaya,Son, Jhun Mo,Ogino, Kenji 한국공업화학회 1999 응용화학 Vol.3 No.1
Novel polymers having hole transport ability were prepared by condensation polymerization of triphenylamine derivatives (TPAs) and aldehydes such as paraformaldehyde (FA) or benzaldehyde (BzA). The polymers synthesized had high glass transition temperature in the range of 172-239℃ and were soluble in common organic solvents. The polymers had hole mobility in the range of 10^-5 to 10^-6 ㎠/Vs. The electroluminescent (EL) devices were fabricated using polymers prepared from N, N'-diphenyl -N, N'-bis(4-methylphenyl)-(1,1'-biphenyl)4,4'-diamine (TPD) as a hole transport layer and aluminum trisquinolinol as an electron transporting and emitting layer. It had turn on voltage of 4V and maximum luminance of 10⁴ cd/㎡, which correspond to the device using low molecular weight compound.