Ion beam induced crosslinking reactions in poly(di-n-hexylsilane)

Citation
S. Seki et al., Ion beam induced crosslinking reactions in poly(di-n-hexylsilane), J PHYS CH B, 103(15), 1999, pp. 3043-3048
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
JOURNAL OF PHYSICAL CHEMISTRY B
ISSN journal
1520-6106 → ACNP
Volume
103
Issue
15
Year of publication
1999
Pages
3043 - 3048
Database
ISI
SICI code
1520-6106(19990415)103:15<3043:IBICRI>2.0.ZU;2-O
Abstract
Thin solid films of poly(di-n-hexylsilane) were irradiated with a variety o f high-energy ion beams, electron beams, and Co-60 gamma-rays of which line ar energy transfer (LET) ranges from 0.2 to 1620 eV/nm. The beams caused no nhomogeneous reactions of crosslinking and main chain scission in the films . The molecular weight of the polymer was traced to give the efficiency of crosslinking reactions: G(x) based on the Charlesby-Pinner relationship. Th e value of G(x) increases from 0.042 to 0.91 with increasing values of LET. We adopt a reaction model in a single ion track to the crosslinking reacti ons, and the expanding chemical track along an ion trajectory is responsibl e for the increasing crosslinking G values. The theoretical aspects of the energy distribution in the penumbra area give a good interpretation of the chemical track radii obtained in this study.