Nitric Oxide Radical Trapping Analysis on Vacuum-Ultraviolet Treated Polymers
Vacuum-ultraviolet (VUV) radiation causes the dissociation of organic σ bonds such as the C−C and the C−H bonds in polyolefins. The radicals formed in this process were investigated by trapping with nitric oxide. PE, PP, and PS were irradiated in ultrahigh vacuum with the MgF2-filtered radiation of...
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Published in | Macromolecules Vol. 31; no. 22; pp. 7613 - 7617 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
Washington, DC
American Chemical Society
03.11.1998
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Subjects | |
Online Access | Get full text |
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Summary: | Vacuum-ultraviolet (VUV) radiation causes the dissociation of organic σ bonds such as the C−C and the C−H bonds in polyolefins. The radicals formed in this process were investigated by trapping with nitric oxide. PE, PP, and PS were irradiated in ultrahigh vacuum with the MgF2-filtered radiation of a hydrogen plasma. After an irradiation period of 1 h and an immediate radical trapping, PE, PP, and PS incorporate 1.4, 0.4, and 0.2 atom % nitrogen, respectively, measured by XPS. These nitrogen concentrations correspond to 5.4 × 1020, 1.4 × 1020, and 0.8 × 1020 spins/cm3, respectively. By the fitting of the XPS-N1s peaks, detailed information about the nitrogen functional groups and about the original radical types was obtained. |
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Bibliography: | ark:/67375/TPS-80GK9D6Z-B istex:2BC446B0F0A703B4E558DF2E5D5A12FDAD9E1591 |
ISSN: | 0024-9297 1520-5835 |
DOI: | 10.1021/ma9802071 |