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- W1999102707 abstract "The photoreactivity of monomolecular films of a diacetylene derivative (10,12-pentacosadiynoic acid (PDA)) under UV irradiation has been investigated at the air-water interface. With decreasing molecular area, the reactivity of the Langmuir film (the Langmuir film is the monomolecular film on an aqueous subphase) decreased, and the colour transition of the Langmuir film polymerized by the UV irradiation was from blue to red. Furthermore, the colour transition (blue to red) was also caused by heating the polymerized Langmuir-Blodgett (LB) films at about 60°C. The colour transition of the polymerized PDA Langmuir film exhibited reversibility at the air-water interface when the condition of the subphase was changed, but that of the LB films did not exhibit reversibility. In the differential scanning calorimetry diagrams, the PDA LB films had an endothermal peak a 67°C, but the polymerized film had two peaks at about 70 and 200°C. These results indicate that the photoreactivity of the PDA monomolecular film at the air-water interface was affected by the molecular arrangement and density, and the colour transition of the PDA polymer may be caused by the structural disorder of the side-groups joined to the polymer backbone." @default.
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- W1999102707 date "1989-11-01" @default.
- W1999102707 modified "2023-09-27" @default.
- W1999102707 title "Photopolymerization of monomolecular films with diacetylene bonds on an aqueous subphase" @default.
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- W1999102707 doi "https://doi.org/10.1016/0040-6090(89)90162-4" @default.
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