Calorimetric and diffractometric study of the room-temperature transitions of polytetrafluoroethylene from aqueous suspension polymerization |
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| Authors: | V Villani R Pucciariello |
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| Institution: | (1) Present address: Dipartimento di Chimica, Universita' della Basilicata, Via N. Sauro 85, 85100 Potenza, Italy |
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| Abstract: | The room-temperature transitions of native (never-melted) polytetrafluoroethylene (PTFE) obtained by aqueous suspension polymerization have been studied through differential scanning calorimetry (DSC) and wide-angle x-ray scattering (WAXS). Two crystal-crystal transitions are observed, instead of the four shown for native PTFE from aqueous emulsion polymerization. One crystalline component seems to be present, which may correspond to the low-transient, already evidenced for PTFE from aqueous emulsion polymerization. |
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| Keywords: | Polytetrafluoroethylene aqueous suspension polymerization crystal-crystal transitions crystalline morphology |
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