DOI: 10.1063/1.1734302. Excitation of π Electrons in Polystyrene and Similar Polymers by 20-keV Electrons

Excitation of π Electrons in Polystyrene and Similar Polymers by 20-keV Electrons

10.1063/1.1734302

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Excitation of the π electrons in thin films of polystyrene and some similar polymers has been observed in the characteristic energy loss spectra of 20-keV electrons scattered at zero angle. The observed energy loss of approximately 7 eV corresponds to the strong uv absorption near 1800 Å in benzene and its derivatives. An energy loss of 6.97±0.10 eV was measured in films of atactic and isotactic polystyrene, styrene ethylene copolymer, and poly 2,3,4,5,6-pentadeuterostyrene, and an energy loss of 7.25±0.15 eV was measured in poly 2,3,4,5,6-pentafluorostyrene. These energy losses appeared as sharp peaks superimposed on a very broad and more intense loss peak with a maximum at 21.3±0.3 eV in all the electron energy loss spectra obtained. The results for the energy loss attributed to the π electrons are correlated with relevant uv absorption data. A discernible decrease in the measured ∼7-eV loss occurred during electron bombardment of the specimens, and is attributed to film contamination and breakdown. The angular distribution of the intensity of each loss in isotactic polystyrene about zero scattering angle was also measured.

Bibliography

Swanson, N., & Powell, C. J. (1963). Excitation of Ï Electrons in Polystyrene and Similar Polymers by 20-keV Electrons. The Journal of Chemical Physics, 39(3), 630â634.

Authors 2

N. Swanson (first)
C. J. Powell (additional)

References 33 Referenced 42

{'key': '2024020822003569600_r1'}
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Dates

Type	When
Created	20 years, 7 months ago (Jan. 5, 2005, 10:57 p.m.)
Deposited	1 year, 6 months ago (Feb. 8, 2024, 5 p.m.)
Indexed	1 year ago (Aug. 3, 2024, 2:30 a.m.)
Issued	62 years ago (Aug. 1, 1963)
Published	62 years ago (Aug. 1, 1963)
Published Print	62 years ago (Aug. 1, 1963)

Funders 0

None

BibTeX

@article{Swanson_1963, title={Excitation of π Electrons in Polystyrene and Similar Polymers by 20-keV Electrons}, volume={39}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.1734302}, DOI={10.1063/1.1734302}, number={3}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Swanson, N. and Powell, C. J.}, year={1963}, month=aug, pages={630–634} }

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  "abstract": "<jats:p>Excitation of the \u03c0 electrons in thin films of polystyrene and some similar polymers has been observed in the characteristic energy loss spectra of 20-keV electrons scattered at zero angle. The observed energy loss of approximately 7 eV corresponds to the strong uv absorption near 1800 \u00c5 in benzene and its derivatives. An energy loss of 6.97\u00b10.10 eV was measured in films of atactic and isotactic polystyrene, styrene ethylene copolymer, and poly 2,3,4,5,6-pentadeuterostyrene, and an energy loss of 7.25\u00b10.15 eV was measured in poly 2,3,4,5,6-pentafluorostyrene. These energy losses appeared as sharp peaks superimposed on a very broad and more intense loss peak with a maximum at 21.3\u00b10.3 eV in all the electron energy loss spectra obtained. The results for the energy loss attributed to the \u03c0 electrons are correlated with relevant uv absorption data. A discernible decrease in the measured \u223c7-eV loss occurred during electron bombardment of the specimens, and is attributed to film contamination and breakdown. The angular distribution of the intensity of each loss in isotactic polystyrene about zero scattering angle was also measured.</jats:p>",
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