The formation of glasslike carbon by pyrolysis of polyfurfuryl alcohol and phenolic resin

✍ Scribed by E. Fitzer; W. Schaefer; S. Yamada

• Publisher: Elsevier Science
• Year: 1969
• Tongue: English
• Weight: 854 KB
• Volume: 7
• Category: Article
• ISSN: 0008-6223
• DOI: 10.1016/0008-6223(69)90518-1

✦ Synopsis

The formation of impermeable glasslike carbon by thermal decomposition of 3-dimensionally cross-linked polyfurfuryl alcohol, phenolic resin, and mixtures thereof was found to be independent of the chemical structure of these resins. In each temperature range, pyrolysis products were obtained in which no pores were detectable by light and electron microscopy. The thermal decomposition is an exothermic process. This thermal behavior corresponds to the formation of the pyrolysis gases. It is concluded that the gaseous by-products must be transported through a capillary system having pore diameters smaller than 30 A. The micropore volume of this system reaches a maximum at '700°C. Natural aanhite as filler material has a catalyzing effect on the crystalline I ordering of the gla&ke disordered carbon.

Glasslike carbons appeared

as commercially available products in the early sixties under the designations of .

Most scientific investigations were concerned with the properties of this special form of carbon whereas only a few papers dealt with the formation of glasslike carbon from well-defined raw materials.