CHARACTERIZATION OF ORIENTATION IN A HIGHLY ORIENTED POLYMERIC FIBER BY FLUORESCENCE DEPOLARIZATION - KEVLAR-49

被引：19

作者：

CHAPOY, LL ^{[1
]}

SPASESKA, D ^{[1
]}

RASMUSSEN, K ^{[1
]}

DUPRE, DB ^{[1
]}

机构：

[1] UNIV LOUISVILLE,DEPT CHEM,LOUISVILLE,KY 40208

来源：

MACROMOLECULES | 1979年 / 12卷 / 04期

关键词：

D O I：

10.1021/ma60070a026

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 degree of order has been estimated for a commercial aramid fiber, Kevlar 49, poly(p-phenyleneterephthalamide), an ultra high modulus, highly oriented fiber material. The uniaxial orientation has been formulated to second order in terms of an orientational distribution function using Legendre polynomials containing both the second and fourth cosine moment averages. These averages have been determined by polarized fluorescence measurements of the intrinsic fluorescence of the sample. Difficulties with depolarization due to intermolecular energy transfer are discussed. The second-order orientational distribution function for the polymer is compared with that for a low molecular weight thermotropic nematic liquid crystal. © 1979 American Chemical Society.

引用

页码：680 / 684

页数：5

共 14 条

[1]

ALFONSO G, 1977, POLYM PREPR AM CHEM, V18, P179

[2] POLARIZATION OF LUMINESCENCE OF PHENANTHRENE [J].