Structural and thermal studies of PVA:NH4I

被引：114

作者：

Hema, M. ^{[2
,3
]}

Selvasekerapandian, S. ^{[1
]}

Hirankumar, G.

Sakunthala, A. ^{[2
]}

Arunkumar, D. ^{[2
,3
]}

Nithya, H. ^{[2
]}

机构：

[1] Kalasalingam Univ, Anand Nagar 626190, Krishnankoil, India

[2] Bharathiar Univ, Div Phys, BU DRDO Ctr Life Sci, Coimbatore 641046, Tamil Nadu, India

[3] Bharathiar Univ, Dept Phys, Solid State & Radiat Phys Lab, Coimbatore 641046, Tamil Nadu, India

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2009年 / 70卷 / 07期

关键词：

Polymers; Electrical properties; SOLID POLYMER ELECTROLYTES; GEL ELECTROLYTES; POLY(VINYL ALCOHOL); IONIC-CONDUCTIVITY; PLASTICIZERS; IMPEDANCE; TRANSPORT; FILMS; SALT;

D O I：

10.1016/j.jpcs.2009.06.005

中图分类号：

O6 [化学];

学科分类号：

070301 [无机化学];

摘要：

Proton-conducting polymer electrolytes based on poly vinyl alcohol (PVA; 88% hydrolyzed) and ammonium iodide (NH4I) has been prepared by solution casting method with different molar ratios of polymer and salt using DMSO as solvent. DMSO has been chosen as a solvent due its high dielectric constant and also its plasticizing nature. The ionic conductivity has been found to increase with increasing salt concentration up to 25 mol% beyond which the conductivity decreases and the highest ambient temperature conductivity has been found to be 2.5 x 10(-3) S cm(-1). The conductivity enhancement with addition of NH4I has been well correlated with the increase in amorphous nature of the films confirmed from XRD and differential scanning calorimetry (DSC) analyses. The temperature-dependent conductivity follows the Arrhenius relation. The polymer-proton interactions have been analyzed by MR spectroscopy. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1098 / 1103

页数：6

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