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Physical, thermomechanical, and rheological properties of bisphenol A–tetrabromobisphenol a copolycarbonates
Author(s) -
Marks M. J.,
Brewster S. L.,
Sekinger J. K.
Publication year - 1994
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.1994.070521215
Subject(s) - materials science , composite material , glass transition , polycarbonate , heat deflection temperature , copolymer , ultimate tensile strength , tetrabromobisphenol a , rheology , flexural modulus , polyetherimide , flexural strength , izod impact strength test , polymer , fire retardant
The physical, thermomechanical, and rheological properties of bisphenol A–tetrabromobisphenol A copolycarbonates (BA–TBBA coPCs) were studied as a function of copolymer composition. TBBA carbonate segments in the copolymer induce proportionally increased glass transition temperatures, heat distortion temperatures, ignition resistance, tensile and flexural moduli, and density. Properties that do not change proportionately with copolymer composition are coefficient of linear thermal expansion, ambient notched Izod and dart puncture impact strengths, and refractive index. Many properties of BA‐TBBA coPCs, including glass transition temperature, heat distortion temperature under load, and modulus, approach those of amorphous high‐performance thermoplastics such as polyetherimide and polyethersulfone. However, these copolymers have the possible advantage of melt blending with bisphenol A polycarbonate to form homogeneous alloys with variable and controllable properties. © 1994 John Wiley & Sons, Inc.