Abstract: UV-stabilized or other modified polycarbonates are prepared by combining polycarbonate, a radical polymerization initiator and a UV-stabilizer-molecule or other additive such as a flame retardant or IR additive containing a reactive group susceptible to radical attack in a melt. In the melt, the UV-stabilizer or other additive is graft polymerized to the polycarbonate to form a modified polycarbonate. The method can be practiced using bis-phenol-A (BPA) polycarbonates, soft-segment polycarbonates and high heat polycarbonates. The reaction may be performed in an extruder.

Abstract: A thermoplastic resin composition comprises units represented by the amide formula (I): ##STR1## and the ester formula (II): ##STR2## wherein said amide units are present as a physical mixture in said resin or as a polymer with the repeating ester units to impart an enhanced crystallization rate as compared to said resin without said amide units of formula (I), said amide units being present in an effective amount to decrease the difference between the temperature of melting and the temperature of crystallization of said resin to an amount less than 5 mole percent of amide unites of formula (I) based on the moles of ester units of formula (II).