Modified polytetrafluoroethylene and process for its production

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Compositions to be polymerized by wave energy wherein said...

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522156, C08F 246, C08F 254, C08F 248, C08J 328

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active

054441030

ABSTRACT:
Modified PTFE is produced by exposing a starting PTFE to an ionizing radiation for a total dose of at least 100 kGy in the absence of oxygen at a temperature not lower than the crystal melting point of the starting PTFE. The thus modified PTFE is improved in radiation resistance and has rubber characteristics.

REFERENCES:
patent: 4586995 (1986-05-01), Randall et al.
Zhong et al., 1990, "Studies on Radiation Effects of PTFE. II. Radiation-Induced Structural Changes and the Temperature Effect," J. Macromol. Sci.-Phys., B29(4):369-377.
Zhong et al., 1992, "XPS Study of Radiation Crosslinked Copolymer of Tetrafluoroethylene with Hexafluoropropylene," Journal of Applied Polymer Science, 44:639-642.
Zhong et al., 1993, "The radiation stability of perfluoroalkoxy resin," Polymer Degradation and Stability, 40:115-116.
Zhong et al., 1993, "Radiation stability of PTFE irradiated under various conditions," Polymer Degradation and Stability, 39:187-191.
Rye, 1993, "Spectroscopic Evidence for Radiation-Induced Crosslinking of Poly(tetrafluoroethylene)," Journal of Polymer Science: Part B: Polymer Physics, 31:357-364.
Zhong et al., 1993, "Radiation-induced crystal defects in PTFE," Polymer Degradation and Stability, 40:97-100.

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