Abstract
The static and dynamic mechanical properties of block copolyester-amides composed of PET oligomer (monomer, dimer and trimer) and nylon 610 were measured.
It was observed that Young's modulus and tensile strength decreased by the copolymer effect with increasing the PET content, while for the same PET content they increased with increasing the length of PET oligomer. Young's inodulus and tensilestrength of the cast film prepared from formic acid solution were higher than that of the hot press film.
E'above the temperature near Tg showed the similar behavior as Young's modulus, while E' below the temperature near Tg increased with increasing the PET content. The temperature of tanδ maximum also showed the similar behavior as Young's modulus. The importance of the longer block sequence-length was suggested from the mechanical properties which were improved with increasing the length of PET oligomer.
