Multi-Layers Thin Films of Acetalized Poly (Vinyl Alcohol) Derivatives Obtained by the LB Method and their Opto-Electronic Properties,
SOPHIA UNIV TOKYO (JAPAN)
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The formation of surface films of acetalized polyvinyl alcohols at the airwater interface has been investigated in terms of the structure of the transferred films, after transfer of these surface films to solid substrates by means of the Langmuir-Blodgett technique. Furthermore, their electron beam exposure characteristics and non-linear optical properties were measured. It was found that the monolayers of acetalized polyvinyl alcohols having aliphatic side chaines gave stable surface films with a limiting area of ca. 0.3nm2-average repeat unit, irrespective of the side-chain length and the degree of polymerization of the starting polyvinyl alcohol. The surface films could be deposited onto various substrates with deposition ratios of 1.0. The resulting multilayers were Y type. The thickness of the multilayers was proportional to the number of layers, and the single-layer thickness increased with increasing sidechain length. The surface wettability of the -multilayers changed alternatingly, depending on whether the number of layers was even or odd.
- Polymer Chemistry