CELLULOSE ESTERS;
MONOLAYER FILMS;
MULTILAYER FILMS;
HOMOGENEOUS FILMS;
ELECTRON MICROSCOPY;
D O I:
10.1295/polymj.24.641
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
The mono- and multilayer Langmuir-Blodgett films of cellulose tri(n-decanoate) (CTD) and cellulose tri(n-octadecanoate) (CTO) were prepared and studied with their fine structures and layer thicknesses by transmission electron microscopy. CTD was found to give a perfectly homogeneous monolayer film. The observed values of the film thickness L and the limiting area A indicated that the alkyl side chains are nearly fully extended and closely packed. The pi-A isotherm of this polymer (but not of CTO) exhibited a plateau region, which was interpreted in terms of a monolayer-to-bilayer transition. CTO also gave a homogeneous monolayer film, which was repeatedly transferred to give multilayer films with a homogeneous surface structure. The observed values of L and A suggested that the alkyl side chains in each layer are essentially extended, but in a somewhat poorly defined fashion as compared with those in thc CTD film.
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页码:641 / 652
页数:12
相关论文
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[1]
FUJIHIRA M, 1985, THIN SOLID FILMS, V132, P77, DOI 10.1016/0040-6090(85)90459-6