A copolycarbonate includes 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 carbonate units derived from a high heat aromatic dihydroxy monomer, and 5-98 mole percent of a low heat carbonate units derived from a low heat aromatic monomer, each based on the sum of the moles of the carbonate units; and optionally, thioether carbonyl endcaps of the formula -C(=O)-L-S-R, wherein L is a C1-12 aliphatic or aromatic linking group and R is a C1-20 alkyl, C6-18 aryl, or C7-24 arylalkylene; wherein the sulfur content of the high heat copolycarbonate in the absence of the thioether endcaps is from 5-20 parts per million by weight.
共聚
碳酸酯包括 0.005-0.1摩尔%的源自含
硫双
酚单体的含
硫碳酸酯单元,2-95摩尔%的源自高热芳香族二羟基单体的高热
碳酸酯单元,以及5-98摩尔%的源自低热芳香族单体的低热
碳酸酯单元,每种
碳酸酯单元均基于
碳酸酯单元的摩尔数总和;以及可选的,式-C(=O)-L-S-R 的
硫醚羰基封端,其中 L 是 C1-12 脂肪族或芳香族连接基团,R 是 C1-20 烷基、C6-18 芳基或 C7-24 芳基亚烷基;其中在没有
硫醚封端的情况下,高热共聚
碳酸酯的
硫含量为百万分之 5-20 (按重量计)。