Journal of Applied Polymer Science · 1988 · 10 citations · 1 references
Natural SciencesMaterials EngineeringMaterials SciencePolymer ChemistryPolymer EngineeringPolymer MaterialsComposite MaterialsInjection MoldingThermoplastic PolymersElastic ModuliMold Temperature ControlPolyethylene TerephthalateTensile StrainTensile TestingThermal Properties
Abstract Thermotropic polyester carbonates derived from t ‐butylhydroquinone, methylhydroquinone, diphenyl terephthalate, and diphenyl carbonate in the molar ratio of 50 : 50 : 55 : 45; 50 : 50 : 57.5 : 5 : 42.5 and 50 : 50 : 60 : 40 can be injection molded successfully from temperatures 10°C below melting to 30–40°C above melting. Normally the best molding temperatures are 10–20°C above melting. If the molding conditions are controlled properly, tensile strengths as high as 1.8 × 10 4 psi, tensile moduli as high as 7.4 × 10 5 psi, and flex moduli as high as 1.1 × 10 6 psi can be obtained.
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