Influence of Copolymer Composition of Polyestercarbonate on Miscibility with Poly(butylene terephthalate)

摘要

Blends of poly(butylene terephthalate)(PBT) and polyestercarbonate (PEC), copolyesters consisting of polycarbonate(PC) and polyarylate(PAr), have been studied by thermal analysis of determine miscibility. The PBT blends with PAr and PEC containing 30 wt % of carbonate unit of less appeared to be miscible, and the tendency for stable signle-phase was observed to decreases as the content of carbonate unit in PEC copolymer increased. As determined with the crystalline phase behavior, the miscibility of PEC with PBT appeared to have a maximum around 10 approx 30 wt % of carbonate content in PEC copolymer, and this result was attributed to the internal repulsion effect between ester and carbonate repeating units in PEC copolymer.