Evaluation and characterisation of chemically modified polymers as secondary electron emitters

Evaluation and characterisation of chemically modified polymers as secondary electron emitters

Measurements of secondary electron emission coefficient and surface work function Phi are reported for polyacrylonitrile (PAN) and polytetrafluoroethylene (PTFE) in the virgin and chemically modified forms. A single pulse method was used for SEE measurements and a retarding field method for estimati...

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Veröffentlicht in:Journal of physics. D, Applied physics Applied physics, 1987-12, Vol.20 (12), p.1631-1636
Hauptverfasser: Dake, S B, Rajopadhye, N R, Bhoraskar, S V
Format: Artikel
Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
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container_end_page 1636
container_issue 12
container_start_page 1631
container_title Journal of physics. D, Applied physics
container_volume 20
creator Dake, S B
Rajopadhye, N R
Bhoraskar, S V
description Measurements of secondary electron emission coefficient and surface work function Phi are reported for polyacrylonitrile (PAN) and polytetrafluoroethylene (PTFE) in the virgin and chemically modified forms. A single pulse method was used for SEE measurements and a retarding field method for estimating the work function. Doping of PTFE with alkali metals (Na and Li) and pyrolysis of PAN at 300 deg C led to an increase in the surface conductivity. The processing of the surface effectively increased the SEE yield in these polymers. Electrical conductivity and XPS results were used to explain the chemical structures of modified polymers. 23 ref.--AA
doi_str_mv 10.1088/0022-3727/20/12/014
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
title Evaluation and characterisation of chemically modified polymers as secondary electron emitters
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