Surface modification of poly(tetrafluoroethylene) film by plasma graft polymerization of sodium vinylsulfonate

✍ Scribed by N. Inagaki; S. Tasaka; Y. Goto

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 303 KB
• Volume: 66
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19971003)66:1<77::aid-app9>3.0.co;2-l

✦ Synopsis

Poly(tetrafluoroethylene) (PTFE) surface was modified by the graft polymerization of sodium vinylsulfonate, and the chemical composition of the graft-polymerized PTFE surface was analyzed by X-ray photoelectron spectroscopy. Peroxides were formed on the PTFE surface by a combination procedure of argon plasma irradiation and air exposure, and the graft polymerization of sodium vinylsulfonate was initiated by the peroxide groups at 65-80ЊC. The peroxide concentration is 3 1 10 /13 to 5 1 10 /13 numbers/cm 2 . The average degree of polymerization of the graft polymers was 3.4 1 10 3 . The graft polymer is distributed over the PTFE surface, but part of the PTFE surface remains uncovered. The coverage with the graft polymer is 43%. The PTFE surface graft polymerized with sodium vinylsulfonate was somewhat hydrophilic, but the hydrophilicity was lower than that of the PTFE surface modified by plasma treatment.