Molecular structure and dielectric properties of some treated lignins

被引：50

作者：

Dawy, M ^{[1
]}

Shabaka, AA

Nada, AMA

机构：

[1] Natl Ctr, Dept Chem Phys, Cairo, Egypt

[2] Natl Ctr, Dept Spect, Cairo, Egypt

[3] Natl Ctr, Cellulose & Paper Dept, Cairo, Egypt

来源：

POLYMER DEGRADATION AND STABILITY | 1998年 / 62卷 / 03期

关键词：

D O I：

10.1016/S0141-3910(98)00026-3

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 infrared absorption spectra of rice straw soda lignin (RSL), cotton stalk soda lignin (CSL) and lignosulphonate (LS) were studied in the region (200-4000 cm(-1)). The structures of the RSL treated with different concentrations of H2O2 and sulphuric acid were analysed spectrophotometrically. The dielectric properties of the investigated samples were measured in the frequency range 10(2)-10(5) Hz and temperature range 20-120 degrees C. The dielectric constant <(epsilon)over bar>, dielectric loss <(epsilon)over bar> and tan delta were measured and are discussed on the basis of the molecular structure obtained from IR spectra. (C) 1998 Elsevier Science Limited. All rights reserved.

引用

页码：455 / 462

页数：8

共 9 条

[1]

BADRY MD, 1994, CELL CHEM TECHNOL, V28, P605

[2] HYDROTHERMAL DEGRADATION OF POLYMERS DERIVED FROM PLANTS [J].