Polymerization Properties and Morphology in LB Films of a Long Chain Diynoic Acid as the Manganese Salt

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  • 長鎖アルキルジイン酸マンガン塩LB膜の重合特性
  • チョウサ アルキルジインサン マンガンエン LB マク ノ ジュウゴウ トクセ

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Abstract

The Langmuir-Blodgett (LB) multilayers of the manganese salt of 10, 12-pentacosadiynoic acid (12-8 ADA) were prepared. The polymerization behavior by UV-irradiation was similar to that of well known 12-8 ADA multilayers as the cadmium salt. But the polymerization and the phase transition from a blue form to a red form during polymerization were accelerated about 4 times and the absorption of a final polymer was twice as large compared with the cadmium salt (Fig.2). These observations indicated that the side chain was much more flexible in a LB-multilayer of 12-8 ADA as the manganese salt than the cadmium salt. From X-ray diffraction studies, changes of interlayer spacings during the polymerization process were measured. Marginal decrease was observed for the manganese salt with approximately=0.6%, but significant decrease was observed for the cadmium salt with approximately 8% (Table 1). The results indicated more favorable packing in the 12-8 ADA multilayer for the polymerization as a manganese salt and supported the smooth polymerization process. Polarizing micrographs indicated large domains of a maximum size of 3 x 1 mm and crystallographic register between layers were formed in polymeric LB-multilayers of 12-8 ADA as the manganese salt (Figs.6-8).

Journal

  • NIPPON KAGAKU KAISHI

    NIPPON KAGAKU KAISHI 1987 (11), 2157-2162, 1987-11-10

    The Chemical Society of Japan

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