Solid- and liquid-states polymerization of tetrafluoroethylene induced by ionizing radiation
| Autor: | Hiroshi Shibano, Keichi Oshima, Hiroshi Sobue, Yoneho Tabata |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Materials science Polytetrafluoroethylene Bulk polymerization technology industry and agriculture macromolecular substances Polymer Activation energy Photochemistry law.invention chemistry.chemical_compound Monomer chemistry Polymerization law Polymer chemistry Van de Graaff generator Tetrafluoroethylene |
| Zdroj: | Journal of Polymer Science Part C: Polymer Symposia. 16:2403-2416 |
| ISSN: | 1935-3065 0449-2994 |
| DOI: | 10.1002/polc.5070160451 |
| Popis: | Solid-state polymerization of tetrafluoroethylene was carried out by initiating with γ-rays from Co60 and electrons from a Van de Graaff generator. Apparent activation energy of the polymerization in the solid state was about 0.3 kcal./mole. The polytetrafluoroethylene which was obtained both in liquid- and solid-state polymerizations was examined by the infrared and x-ray diffraction methods. From these experiments it was clearly demonstrated that the crystalline structure is quite different between both polymers. It indicates that the polymerization in the solid state is strongly influenced by the crystal lattice of the monomers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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