Solution behavior of the poly[bis(carboxylatophenoxy)phosphazene] polyelectrolyte

被引：10

作者：

Dentini, M ^{[1
]}

Barbetta, A ^{[1
]}

Masci, G ^{[1
]}

Capitani, D ^{[1
]}

Segre, AL ^{[1
]}

机构：

[1] IST STRUTTURIST CHIM,I-00016 MONTEROTONDO,RM,ITALY

来源：

MACROMOLECULES | 1997年 / 30卷 / 24期

关键词：

D O I：

10.1021/ma9703463

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 behavior of a high molecular weight sodium poly[bis(carboxylatophenoxy)phosphazene] (NaPCPP) polyelectrolyte sample in aqueous solution has been investigated by means of viscosity, conductivity, sodium counterion potentiometric ''activity coefficient'' (gamma(+)) measurements, and Na-23-NMR experiments. The set of data clearly and consistently points out the peculiar polyelectrolytic behavior of NaPCPP in water. In our opinion, this is essentially due to the pal tial hydrophobic character of flexible NaPCPP chains which would easily ''entangle'' even at low concentrations in water and, in addition, would give rise to ''entanglement collapse'' with increasing solution temperature.

引用

页码：7456 / 7461

页数：6

共 25 条

[1] AN IONICALLY CROSS-LINKABLE POLYPHOSPHAZENE - POLY[BIS(CARBOXYLATOPHENOXY)PHOSPHAZENE] AND ITS HYDROGELS AND MEMBRANES .8. [J].