Modification of polytetrafluoroethylene by electron beam irradiation in various atmospheres

Authors
Lappan, U Geissler, U Lunkwitz, K
Citation
U. Lappan et al., Modification of polytetrafluoroethylene by electron beam irradiation in various atmospheres, NUCL INST B, 151(1-4), 1999, pp. 222-226
Citations number
21
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
ISSN journal
0168583X → ACNP
Volume
151
Issue
1-4
Year of publication
1999
Pages
222 - 226
Database
ISI
SICI code
0168-583X(199905)151:1-4<222:MOPBEB>2.0.ZU;2-Z
Abstract
The changes in the chemical structure of polytetrafluoroethylene (PTFE) ind uced by electron beam irradiation in vacuum and in ammonia gas atmosphere h ave been investigated by means of Fourier-transform infrared (FTIR) spectro scopy. Double bonds and trifluoromethyl branches are formed by irradiation in vacuum. The CF3 branching is enhanced distinctly by irradiation at eleva ted temperature above the melting point of PTFE. After irradiation in ammon ia gas atmosphere ammonium fluoride salt was detected in the irradiated flu oropolymers. (C) 1999 Elsevier Science B.V. All rights reserved.