SELF-CONDENSATION OF OXIDIZED LIGNOSULFONATE .2. CONDENSATION BEHAVIORS

被引：5

作者：

CHEN, RB ^{[1
]}

WU, GX ^{[1
]}

机构：

[1] S CHINA UNIV TECHNOL,GUANGZHOU,PEOPLES R CHINA

来源：

JOURNAL OF APPLIED POLYMER SCIENCE | 1991年 / 42卷 / 07期

关键词：

D O I：

10.1002/app.1991.070420735

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Studies have been made on the principal parameters that affect the self-condensation of oxidized lignosulfonate, such as lignin content, pH, temperature, time of hot pressing, and oxidation. During condensation, the hydroxyl groups in both the lignosulfonate and carbohydrate molecules could react with carboxyl, sulphonic acid, and carbonyl groups to form an ester bond and result in (hemi) ketal and (hemi) acetal structures. These structures made condensation products having excellent resistance in water and in alkaline solutions. The results also demonstrated that the oxidized lignosulfonate could be condensed at a higher rate than could the untreated one.

引用

页码：2073 / 2079

页数：7