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Several ethylene terephthalate-ethylene oxide segmented copolymers with long soft segments, in which poly(ethylene oxide) (PEO) chains serve as soft segments while poly(ethylene terephthalate) (PET) chains serve as hard segments, were investigated by dynamic mechanical analysis (DMA). The PET-PEO copolymers show three distinguishable relaxation processes, α-, β- and γ-relaxation, within the examined...
Blends of the polyhydroxyether of bisphenol-A (Phenoxy) and a series of ethylene terephthalate (ET)-caprolactone (CL) random copolyesters (TCL) having different ET contents were examined mainly by differential scanning calorimeter (DSC). A miscibility limit specified by the ET content was obtained and estimated to be about 90 wt%. When the ET content is less than this limit, the Phenoxy and copolyesters...
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