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Thermotropic polyester carbonates. III. Thermotropic polyester carbonates as self‐reinforced plastics
Author(s) -
Lai Y.C.,
Debona B. T.,
Prevorsek D. C.
Publication year - 1988
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1988.070360407
Subject(s) - thermotropic crystal , polyester , materials science , ultimate tensile strength , composite material , molding (decorative) , polymer chemistry , polymer , liquid crystalline
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.