ORDERED STRUCTURE IN POLYESTER ELASTOMERS CONTAINING QUATERPHENYL GROUP

By use of DSC, X-ray diffraction and dynamic mechanical spectroscopies , phase separation and ordered structure were investigated for 4, 4''' -dihydroxy-p-quaterphenyl /ethylene glycol/adipic acid copolymers (xDH Q copolyesters, x: DHQ content in mol%, 0<x less than or equal to 10). The xDHQ copolyesters are distinctly phase-separated into two phases, rigid DHQ and soft PEA phases. The PEA phase were partially crystalli ne, and showed glass transition near 240 K and melting of PEA crystall ites near 280 K. In the DHQ phase, DHQ segments were ordered in layere d structure at room temperature.