Novel copolycarbonates of six types were prepared via melt polycondensation of various aromatic and aliphatic diphenyl dicarbonates and monomers, including bisphenol A, bisphenol S, bis[4-(beta-hydroxy-ethoxy)phenyl]sulfone and bisphenol AF, giving copolycarbonates in four series of each type. The copolycarbonates were characterized with infra-red spectra, inherent viscosity, differential scanning calorimetry, thermogravimetric analysis, X-ray diffraction, solubility and contact angle measurements. Copolycarbonates had inherent viscosities in the range 0.28-0.45 dl g(-1). The copolycarbonates were soluble in N-methylpyrrolidinone, dimethylformamide, pyridine, dimethylsulfoxide and phenol. The glass transition temperatures (T-g) of the copolycarbonates were in the range 79-159 degrees C. Copolycarbonates containing bromine have a higher T-g and a lower T-d(10) (temperature at which there is 10% loss of mass). These brominated copolycarbonates have good flame retardancy, indicated by their large limiting oxygen index in the range 52-70. Copolycarbonates based on tetrabromobisphenol S are more wettable than copolymers without bromine.