Deflection temperature

Coefficient of linear thermal expansion, 10 °C Deflection temperature under 110-170 110-170 100-200 80-120 6.6 11-50 20-60... 

Standard Test Methodfor Deflection Temperature of Plastics Under FlexuralEoad, ASTM D648-82, ASTM, Philadelphia, Pa., 1988. 

To convert J/m to ftlbf/in., divide by 53.38. Deflection temperature under load. 

An all aromatic polyetherimide is made by Du Pont from reaction of pyromelUtic dianhydride and 4,4 -oxydianiline and is sold as Kapton. It possesses excellent thermal stabiUty, mechanical characteristics, and electrical properties, as indicated in Table 3. The high heat-deflection temperature of the resin limits its processibiUty. Kapton is available as general-purpose film and used in appHcations such as washers and gaskets. Often the resin is not used directly rather, the more tractable polyamide acid intermediate is appHed in solution to a surface and then is thermally imidi2ed as the solvent evaporates. 

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