Modification of oxidized graphite edge surface with poly(vinyl chloride)

✍ Scribed by M. Nakahara; S. Asai; Y. Sanada; T. Ueda

• Book ID: 104738130
• Publisher: Springer
• Year: 1995
• Tongue: English
• Weight: 484 KB
• Volume: 30
• Category: Article
• ISSN: 0022-2461
• DOI: 10.1007/bf00356703

✦ Synopsis

An oxidized edge surface of pyrolytic graphite (PG) has been prepared by electrochemical treatment. Athin layer of poly(vinyl chloride) (PVC) was coated onthe oxidized edge surface, and the PVC~coated sample heat treated at 300, 400, and 500 ~ respectively= The infruence of the PVC coating on the structural change of the oxidized edge surface of PG caused by the heat treatrnent was studied by laser Raman and Fourier transform-infrared attenuated: total reflection spectroscopies. For the electrochemical treatment, the formation of oxygen-conta~ining functional groups proceeds over the edge surface of PG. Witch increasing degree of ox[dat/on, the functional groups are formed in the following order; hydroxyl groups, carbo, xyl groups, lactone groups, quinones, and acid anhydrides, Acid an~ydri'des are formed on the outermost surface and completely eliminated by heat trea.tmer~t up to 300 ~ The other functional groups remain even after heat treatment up to 500~ Newever, the functional groups are eliminated bythe PVC coating, the elimination terrrpe~ture ~epending on the type of functional groups: quinones, lactone groups, and carboxyl groeps are eliminated at 300, 400, and 500 ~ respectively. PVC coated on the ed#e surface is found to play an important role in the complete elimination of oxygen-containing functiona~ groups with > C=O through heat treatment at 500~