THERMALLY STABLE POLYCARBONATES, THERMOPLASTIC COMPOSITIONS THEREOF, AND ARTICLES FORMED THEREFROM

摘要

A polycarbonate such as aliphatic/aromatic polycarbonate comprises repeating structural carbonate units of the formula (H-I): in which R^h is a radical having the formula (H-2): wherein each of R₁₁, R₁₂, R₁₃, R₁₄, R₁₅. R₁₆, R₁₇, R₁₈, R₁₉, R₂₀, R_2I, R₂₂, R₂₃, R₂₄, R₂₅, R₂₆, R₂₇, and R₂₈ is independently a hydrogen, a C₁-C₆ alkyl group, or a halogen substituted C₁-C₆ alkyl group. The polycarbonate, and a thermoplastic composition thereof, have improved thermal stability, cost-effectiveness, and exhibit improved manufacturability such as, for example, minimum cyclic carbonate formation and minimum amine acceptor requirement.