Investigation of gel inhibitor assisted dissolution of polyaniline: A case study for emeraldine base, 2-methyl-aziridine, and N-methyl-pyrrolidone

被引：29

作者：

Yang, D ^{[1
]}

Mattes, BR ^{[1
]}

机构：

[1] Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA

来源：

SYNTHETIC METALS | 1999年 / 101卷 / 1-3期

关键词：

polyaniline; solution processing; sol-gel methods; solid-liquid phase transitions; films; fibers;

D O I：

10.1016/S0379-6779(98)00225-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The secondary amine 2-methylaziridine (2MA) is used as an additive together with N-methyl-2-pyrrolidone (NMP), to inhibit the gel formati of highly concentrated high molecular weight solutions of polyaniline (PANi) in the emeraldine base (EB) oxidation state for up to 29 hours room temperature. Rheological properties of concentrated EB (similar to 20 wt%) solutions are studied by means of rotational viscometry as function of 2MA/EB molar ratio, time, shear rate, and temperature. Due to the formations of hydrogen bonds between the amine proton of 2MA and t lone electron pair from the imine nitrogens in the EB repeat unit. 2MA and NMP prevents the interactions between polymer chains which le; to enhanced solubility, dramatic prolongation of times to gelation, and reductions in initial solution viscosity. The temperature effects on t gelation time and the activation energy for viscous flow are reported.

引用

页码：746 / 749

页数：4

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