Thermally Stimulated Discharge Currents from Sodium Nitrate-Doped Polyacrylonitrile.

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Abstract:

Enhancement of charge capable of being stored in a polymer by direct incorporation of ions has been studied. The system chosen was polyacrylonitrile PAN into which had been dissolved either sodium nitrate, ammonium nitrate, or lithium chloride. Stored charge was measured by use of the Thermally Stimulated Discharge Current TSDC method. It was found, for example, that addition of 4 wt salt could enhance stored charge by at least fifty-fold. The TSDC method also revealed that the stored charge arose from at least six identifiable contributions. The lower temperature contributions involved preferentially oriented dipoles, while the higher-temperature ones were caused by displaced real charges. No evidence for a strong interaction between dissolved ionic species and PAN chains at the repeat unit level was found, but density fluctuations on the supramolecular size-scale do appear to influence the stability of these stored real charges. Author

Author(s):
Ueda, H. ; Carr, S. H.
Author Organization(s):
NORTHWESTERN UNIV EVANSTON ILL MATERIALS RESEARCH CENTER
Descriptive Note:
Interim technical rept.,
Pagination:
0031

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
TR-9
Contract/Grant Number(s):
N00014-75-C-0963
 Subject Terms
Joint Capability Areas:
JCA_1_Force Support; JCA_1.2_Force Preparation; JCA_1.2.3_Educating; JCA_4.1_Deployment and Distribution; JCA_4.6_Engineering; JCA_1.3_Human Capital Management; JCA_1.3.2_Personnel Management; JCA_JCA_4.1.2_Sustain the Force; JCA_1.4.1_Force Health Protection; JCA_1.4_Force Support; JCA_6.3.3_Spectrum Management; JCA_3.2_Engagement; JCA_3_Force Application; JCA_5_Command and Control; JCA_8.2.1_Partner with Governments and Institutions; JCA_8.2_Shape; JCA_8_Building Partnerships
Modernization Areas:
Microelectronics
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ACRYLONITRILE POLYMERS, *DOPING, *POLYACRYLATES, *SODIUM NITRATES, THERMAL PROPERTIES, METHODOLOGY, STIMULATION(GENERAL), DIELECTRICS, ELECTRICAL CONDUCTIVITY, ELECTRIC DISCHARGES, SPACE CHARGE
Field(s)/Group(s):
Plastics
Keyword(s):
Thermally stimulated, Electrets, TSDC(Thermally Discharge Current), WUNR051599
Report Date:
1980 Sep 03