Polymer International · 2003 · 12 citations · 15 references
Natural SciencesChemistryMaterials SciencePhysical ChemistryPolymer ChemistryPolymer MaterialsPolymer AnalysisPolymer CharacterizationPolymer Physical ChemistryPolymer PhysicsPolymer StructurePolymerization ChemistryChain Branching ReactionsChain ScissionChain Scission MechanismsPolymer Branching AnalysisPolymer Chain ScissionPolymer Radiation DamageRadiation Chemistry Of PolymersRadiation-induced Polymerization
Abstract The radiation chemistry of poly(tetrafluoroethylene‐ co ‐hexafluoropropylene) (FEP) with a TFE mole fraction of 0.90 has been studied under vacuum using 60 Co γ‐radiation over a range of temperatures and absorbed doses. The radiolysis temperatures were 300, 363, 423, 523 and 543 K. New structure formation in the copolymers was analysed by solid‐state 19 F NMR spectroscopy. The new structures formed in the copolymers have been identified and the G ‐values for the formation of new chemical structures have been investigated at 363 and 523 K. These two temperatures are just above and just below the polymer T g and T m , respectively. At the lower temperature, there was no evidence for any chain branching and an estimate of G (S) of 1.0 was obtained. A value of G (S) of 1.3 and a minimum value of G (X) Y of 1.3 were obtained at 523 K. Copyright © 2003 Society of Chemical Industry
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The radiation chemistry of fluoropolymers
John S. Forsythe, David J. T. Hill · Progress in Polymer Science · 2000 · 256 citations
Radiation induced crosslinking of polytetrafluoroethylene
Akihiro Oshima, Yoneho Tabata, H. Kudoh et al. · Radiation Physics and Chemistry · 1995 · 217 citations