TRANSIENT CURRENTS IN POLY(VINYL ALCOHOL) POLY(VINYL PYRROLIDONE) POLYMER BLEND FILMS

被引：8

作者：

NARAYANA, KL ^{[1
]}

DASARADHUDU, Y ^{[1
]}

RAO, VVRN ^{[1
]}

机构：

[1] SRI VENKATESWARA UNIV,DEPT PHYS,TIRUPATI 517502,ANDHRA PRADESH,INDIA

来源：

POLYMER INTERNATIONAL | 1994年 / 35卷 / 04期

关键词：

TRANSIENT CURRENTS; POLYMER BLEND FILMS; QUASI-STEADY-STATE CURRENTS; ISOCHRONAL CURRENTS; ACTIVATION ENERGIES; DIPOLAR PROCESS; SPACE CHARGE;

D O I：

10.1002/pi.1994.210350403

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Transient currents (charging and discharging currents) in poly(vinyl alcohol) (PVA)-poly(vinyl pyrrolidone) (PVP) polymer blend films were measured over the temperature range 30-150-degrees-C at field strengths of 2.32-23.2 x 10(6) Vm-1. Polymer films were prepared by the isothermal immersion technique. Activation energies were evaluated from quasi-steady-state currents. A single relaxation peak was observed both from isochronal currents and low frequency dielectric relaxation. Activation energies evaluated from these two methods are found to be in fairly good agreement. The polarization is considered to be due to space charge origin along with some contribution from dipolar groups. The maximum loss was observed in Sample I (PVA: PVP = 25: 75), suggesting maximum heterogeneity in this blend ratio.

引用

页码：315 / 320

页数：6

共 9 条

[1] CHARGING AND DISCHARGING CURRENTS IN POLY(VINYL PYRROLIDONE) POLYMER THIN-FILMS
LAKSHMINARAYANA, K
DASARADHUDU, Y
RAO, VVRN
MATERIALS CHEMISTRY AND PHYSICS, 1995, 42 (03) : 206 - 209
[2] Anomalous thermally stimulated currents and space charge in poly(vinyl pyrrolidone)
Khare, PK
Jain, SK
POLYMER INTERNATIONAL, 2000, 49 (03) : 265 - 268
[3] Pyroelectric behaviour of polyvinyl alcohol (PVA)-polyvinyl pyrrolidone (PVP) polymer blend films
Lakshminarayana, K
Rao, VVRN
MATERIALS LETTERS, 1997, 30 (01) : 65 - 71
[4] Phase transformations of some poly(vinyl alcohol)-NiCl2 composites
El-Shahawy, MA
POLYMER INTERNATIONAL, 2003, 52 (12) : 1919 - 1924
[5] Thermal degradation kinetics of poly(vinyl chloride-co-vinyl acetate)
Chattopadhyay, S
Madras, G
POLYMER DEGRADATION AND STABILITY, 2002, 78 (03) : 519 - 524
[6] TRANSIENT CURRENTS IN DISCHARGE MODE IN CELLULOSE-ACETATE - POLYVINYL ACETATE BLEND FILMS
KHARE, PK
CHANDOK, RS
SRIVASTAVA, AP
PRAMANA-JOURNAL OF PHYSICS, 1995, 44 (01): : 9 - 18
[7] Effect of stretching on space charge behaviour of poly(vinyl chloride) as analysed by the thermal step method and the thermally stimulated depolarization currents technique
Guarrotxena, N
Vella, N
Millan, JL
Agnel, S
Toureille, A
POLYMER INTERNATIONAL, 2000, 49 (11) : 1279 - 1282
[8] Structural and electrical conductivity of CH:MC bio-poly-blend films: optimize the perfect composition of the blend system
Abdullah, Omed G. H.
Hanna, Rawad R.
Salman, Yahya A. K.
BULLETIN OF MATERIALS SCIENCE, 2019, 42 (02)
[9] Structural and electrical conductivity of CH:MC bio-poly-blend films: optimize the perfect composition of the blend system
Omed G H Abdullah
Rawad R Hanna
Yahya A K Salman
Bulletin of Materials Science, 2019, 42

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