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Influence of Irradiation Temperature on Grafting of Styrene into Poly(tetrafluoroethylene ‐co‐ hexafluoropropylene) Films
Author(s) -
Lappan Uwe,
Geißler Uwe,
Gohs Uwe,
Uhlmann Steffi
Publication year - 2009
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200900077
Subject(s) - hexafluoropropylene , materials science , tetrafluoroethylene , irradiation , grafting , styrene , elongation , ultimate tensile strength , polymer , glass transition , electron paramagnetic resonance , polymer chemistry , chemical engineering , copolymer , radical initiator , composite material , nuclear magnetic resonance , physics , nuclear physics , engineering
This study concerns with the investigation of the effect of irradiation conditions on grafting of styrene into FEP films by the pre‐irradiation method. EPR spectroscopy was used to characterize the base polymer material regarding the trapped radical species and their concentration. Radiation‐induced changes in the chemical structure were studied by IR spectroscopy. Tensile strength and elongation at break as well as yield of grafting were found to be strongly influenced by irradiation temperature. Main‐chain scissions were identified to be the reason for the deterioration of the mechanical properties after radiation treatment at temperatures below glass transition temperature.