Sulfur-stabilized copolycarbonates and articles formed therefrom

A copolycarbonate, comprising:

• 0.005-0.1 mole percent of sulfur-containing carbonate units derived from a sulfur-containing bisphenol monomer,
• 2-95 mole percent of high heat aromatic carbonate units derived from a high heat aromatic dihydroxy monomer, wherein the high heat aromatic dihydroxy monomer comprises a hydrogen on a benzylic carbon or a hydrogen on a tertiary carbon, and
• 5-98 mole percent of low heat carbonate units derived from a low heat aromatic monomer,
• each based on the sum of the moles of the carbonate units;
• and
• thioether carbonyl endcaps of the formula —C(═O)-L-S—R, wherein each occurrence of L is independently a C1-12 aliphatic or aromatic linking group and R is a C1-20 alkyl, C6-18 aryl, or C7-24 arylalkylene and wherein the thioether carbonyl endcaps are present in an amount effective to provide 5-70 parts per million by weight of added sulfur, based on the total parts by weight of the copolycarbonate;
• wherein the sulfur-containing carbonate units are present in an amount effective to provide 5-30 parts per million by weight of added sulfur, based on the total parts by weight of the copolycarbonate.