Journal of Applied Polymer Science · 1979 · 81 citations · 6 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer MaterialsThermal AnalysisPolymer BlendsPolymer CharacterizationPolymer Phase BehaviorPolymer Physical ChemistryPolymer ThermodynamicsThermoplastic PolymersBlend CompositionDynamic Mechanical CharacterizationDynamic Mechanical PropertiesMelt BehaviorMiscible Polymer BlendsPhase FormationPolycarbonatePolymer Blending
Abstract Melt blends of polycarbonate with Kodel, a homopolyester formed from 1,4‐cyclohexanedimethanol and terephthalic acid, and with Kodar, a copolyester formed by replacing some of the terephthalic acid with isophthalic acid, were prepared and their transitional behavior were examined by thermal analysis and dynamic mechanical testing. Blends formed with either polyester were found to have a single T g over the entire compositional range. Single composition‐dependent α‐ and β‐relaxation temperatures were also observed for blends made with either polyester at all compositions. From these data it is concluded that both Kodel and Kodar blends with polycarbonate form miscible amorphous phases. The role of ester–carbonate interchange reactions during melt mixing was experimentally examined and found to be unimportant, from which it is concluded that the observed miscible phase formation is due to physical interactions between the blend components.
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Molecular motions in polyethylene terephthalate
Karl‐Heinz Illers, H. Breuer · Journal of Colloid Science · 1963 · 402 citations