Metal-containing polyacrylonitriles: ESR studies and conductivity
- A.N. Nesmeyanov Institute of Organo-Element Compounds, Moscow (Russian Federation)
Metal-containing polyacrylonitriles (PAN) synthesized by the complexation of VI B group metal hexacarbonyls with PAN nitrile groups were studied during thermolysis in air at 220{degrees}C to find conditions for preparation of conductive polymeric films. It was shown that increase of W content in polymer leads to significant decrease of {gamma}{sub v} to magnitude about 10{sup -16} {Omega}/cm as compared with conductivity of thermolized initial PAN ({gamma}{sub v} = 10{sup -11} {Omega}/cm). In contrast, PAN-Cr samples heated under the same temperature-time conditions in an external field 40-50 kV/cm show the increase of conductivity: at a chromium content of 3.1 wt.% {gamma}{sub v} reaches a value of 10{sup -5} {Omega}/cm. According to ESR study, the thermolized PAN-Cr contains Cr{sub 2}O{sub 3} particles (a broad ESR signal at H=65 Oe); in so doing rough estimate of Cr{sub 2}O{sub 3} dispersity gives a value about 3 nm. Upon thermolysis of PAN-Mo in external field the enhancement of conductivity also occurs. The values of the temperature resistance factors for PAN-Cr and PAN-Mo in the temperature range 20-200{degrees}C reaches a value 1-9 x 10{sup -4} K{sup -1}.
- OSTI ID:
- 126952
- Report Number(s):
- CONF-950402-; TRN: 95:006086-1029
- Resource Relation:
- Conference: 209. American Chemical Society (ACS) national meeting, Anaheim, CA (United States), 2-6 Apr 1995; Other Information: PBD: 1995; Related Information: Is Part Of 209th ACS national meeting; PB: 2088 p.
- Country of Publication:
- United States
- Language:
- English
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