Journal of Applied Polymer Science · 1966 · 24 citations · 12 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsPolymer AnalysisPolymer CharacterizationPolymer Physical ChemistryPolymer PhysicsRadiation Damage In MaterialsRadiation-resistant MaterialsCrosslink Density EffectsDynamic Mechanical PropertiesHardnessPolymer Radiation DamageRadiation Chemistry Of PolymersRadiation Cross-linking EffectsRadiation-induced DegradationSilicone Elastomers
Abstract Dimethyl‐, trifluoropropyl‐, and high phenyl content polysiloxanes were irradiated in a 60 Co source to doses of 100 Mrad. The hardness of the specimens increased with dose. Crosslink density changes did not directly reflect the hardness changes. The crosslink density of the dimethyl polymer increased significantly and that of the trifluoropropyl polymer increased only slightly. There was a slight decrease in the crosslink density of the aromatic material. The storage moduli reflected the changes in crosslink density. Loss moduli of the dimethyl‐ and trifluoropropylpolysiloxanes initially decreased and then increased on continuing irradiation. Dynamic moduli of the high aromatic content polymer were essentially unchanged by the radiation. All the dynamic data were correlated by the WLF time–temperature relationship.
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Viscoelastic Properties of Polymers
John D. Ferry, H. S. Myers · Journal of The Electrochemical Society · 1961 · 13.5K citations
Natural Sciences, Materials Engineering, Materials Science +17
Radiation Chemistry of Polymeric Systems
V.P. Calkins · Nuclear Science and Engineering · 1963 · 742 citations