Thermal Behaviors of COPNA Resins from Anthracene and Phenanthrene as Raw Materials

Kaneko Tomohiko, Ota Etsuro, Otani Sugio, Ono Misaki, Kanazawa Mayumi

doi:10.7209/tanso.1988.9

The COPNA resins were prepared from fused polycyclic aromatic hydrocarbons (anthracene and phenanthrene) and 1, 4-benzenedimethanol (PXG) as cross-linking agent, and p-toluenesulfonic acid (PTS) as catalyst, and heat-treated at temperatures between 200 and 2400°C to examine their thermal behaviors.<BR>The resulting resins were considerably different in their thermal behaviors below 500°C e.g., ring closure reaction of anthracene- and phenanthrene-based COPNA resins occurs below and above 300°C respectively and, in addition, the weight loss of the former resin began at 380°C, which is lower by 70°C than that of latter. The cross-linking reaction of anthracene occurs mainly at its 9-and 10-positions and the resulting bridges are under serious steric compression. This may be responsible for the thermal behavior characteristic of the anthracene-based resin.<BR>The nature of raw aromatic hydrocarbon, on the other hand, gave no effect on thermal behavior of the resins above 500°C, possibly because three-dimensionally cross-linked structure in the resins controls predominantly thermal behavior at this temperature range. X-Ray parameters of both resins after heating below 1000°C were so similar to those of graphitizable carbon but after heating to higher temperature the derived carbons did not developped their layer structure, they are classifide into non graphitizable carbons.

Thermal Behaviors of COPNA Resins from Anthracene and Phenanthrene as Raw Materials

Bibliographic Information

Search this article

Description

Journal

Keywords

Details 詳細情報について

Export

Report a problem