Surface coating protective against oxidative plasma etching of polypropylene

✍ Scribed by Toshihiro Hirotsu; Pramono Nugroho

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 196 KB
• Volume: 66
• Category: Article
• ISSN: 0021-8995
• DOI: 10.1002/(sici)1097-4628(19971107)66:6<1049::aid-app5>3.0.co;2-i

✦ Synopsis

Polypropylene (PP) sheets were coated with the ultrathin polymer layers by plasma polymerization of hexamethyldisiloxane and two other Si-containing monomers, and the protection effects from oxidative plasma etching were investigated. Etching was evaluated by the weight loss of PP sheets after the exposure to an oxidative plasma of O 2 or air. The effects of plasma polymer coating on the etching resistance were investigated with respect to the type of plasma polymer, thickness of a coating layer, oxidative plasma etching conditions, etc. Weight of the coated PP sheets was less changed and the substrates remained stable after a certain period of oxidative plasma treatments, during which time the original PP film had prominently lost weight. The importance of the crosslinked network with {Si{ components in plasma polymers on the etching resistance was suggested from the results. Infrared spectra were taken and analyzed with the plasma polymers after O 2 -plasma treatments, and the increase in the Si{O structure was indicated by the increase in the peak intensity at 1023 cm 01 . Stabilization against oxidative etching was attributed to the crosslinked Si{O structure on the surface layer.