... 6NHCO(CH2)4CO)nFeatures:only soluble in m-Cresol, it has high mechanical strength,good dimension,stiffness and toughness, ... N/Cm2Impact strength:20.5842.14 N·cm/cm2Appearance:it is a thermoplastic resin, white solid granulesRockwell hardness:108118Heat distortion ... machine casing instead of non-ferrous material and as automobile engine vane etc,it is usually produced in the condensation polymerization ...