Conductivity of some tetra-n-alkylammonium salts of pectic acid

被引：14

作者：

Abramovic, H ^{[1
]}

Klofutar, C ^{[1
]}

机构：

[1] UNIV LJUBLJANA,BIOTECH FAC,LJUBLJANA 1000,SLOVENIA

来源：

EUROPEAN POLYMER JOURNAL | 1997年 / 33卷 / 08期

关键词：

D O I：

10.1016/S0014-3057(96)00262-5

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

From commercially available pectin, (OBIPEKTIN AG), pectic acid was isolated by alkaline catalysed hydrolysis and physicochemically characterized. The conductivities of aqueous solutions of tetramethyl-, tetraethyl-, tetra-n-propyl- and tetra-n-butyl pectate were determined. The concentration dependence of the conductivity as well as the conductometric titration of the investigated systems exhibited typical polyelectrolyte behaviour. The mobility of the polyelectrolyte solute was found to be influenced by the nature of the counterion. The calculated values of the molar conductivity deduced on the basis of the Manning limiting law were found to be lower than the experimental ones. The fraction of free counterions was evaluated and found to depend on the concentration and on the nature of the counterion. (C) 1997 Elsevier Science Ltd.

引用

页码：1295 / 1300

页数：6

共 37 条

[11] PREPARATION OF WATER-SOLUBLE POLYURONIC ACIDS AND THEIR CALCIUM SALTS, AND DETERMINATION OF CALCIUM-ION ACTIVITY IN RELATION TO DEGREE OF POLYMERIZATION [J].