Accession Number : ADP007481

Title :   Multi-Layers Thin Films of Acetalized Poly (Vinyl Alcohol) Derivatives Obtained by the LB Method and their Opto-Electronic Properties,

Corporate Author : SOPHIA UNIV TOKYO (JAPAN)

Personal Author(s) : Oguchi, Kiyoshi ; Yokoh, Yasuhiko

Report Date : FEB 1991

Pagination or Media Count : 12

Abstract : The formation of surface films of acetalized poly(vinyl alcohol)s at the air/water 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 poly(vinyl alcohol)s 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 poly(vinyl 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.

Descriptors :   *POLYMERIZATION, AIR, CHAINS, DEPOSITION, ELECTRON BEAMS, ELECTRONS, FILMS, INTERFACES, LAYERS, LENGTH, NUMBERS, OPTICAL PROPERTIES, RATIOS, SOLIDS, STARTING, STRUCTURES, SUBSTRATES, SURFACES, THICKNESS, TRANSFER, WATER.

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE