High heat resistance and cold resistance, can be used in the temperature range of +130 ~ -100 degrees Celsius for a long time. It has no obvious melting point, and its melting temperature is generally between 220 and 230 degrees Celsius, and its decomposition temperature is generally above 300 degrees Celsius. The thermal deformation temperature of 18.5 kg/cm 2 is 130 ~ 140 degrees Celsius, which is higher than that of polyformaldehyde and only lower than that of polysulfone and polyphenyl ether. The embrittlement temperature is below minus 100 degrees Celsius.
