Aromatic polyesters with flexible side chains. 8. Studies on long periodical structure observed in layered crystalline phase

被引：18

作者：

Fu, K ^{[1
]}

Nematsu, T ^{[1
]}

Sone, M ^{[1
]}

Itoh, T ^{[1
]}

Hayakawa, T ^{[1
]}

Ueda, M ^{[1
]}

Tokita, M ^{[1
]}

Watanabe, J ^{[1
]}

机构：

[1] Tokyo Inst Technol, Dept Polymer Chem, Meguro Ku, Tokyo 1528552, Japan

来源：

MACROMOLECULES | 2000年 / 33卷 / 22期

关键词：

D O I：

10.1021/ma001056g

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Long periodical structure was studied for the crystal of a rigid-rod liquid crystalline BC-6 polyester composed of the 1,4-dihexyl ester of pyromellitic acid and 4,4'-biphenol with small-angle X-ray scattering (SAXS) and transmission electron microscope (TEM) measurements. The highly oriented crystalline fibers which were prepared by spinning a nematic melt of the sample and succeeding annealing showed well-defined scattering maxima with a spacing in the range of 250-300 Angstrom in the SAXS pattern and the corresponding clear stripes in the TEM photograph. The long spacing is attributed to the crystalline lamellae Stacked along the chain axis. This is the first example of long periodical structure in the fully aromatic polymer systems. The origin of the long periodic structure is discussed.

引用

页码：8367 / 8370

页数：4

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