The hydrolysis degradation of bisphenol-A polycarbonate (BPA-PC), isosorbide (ISB)-co-1,4-cyclohexanedimethanol (CHDM) polycarbonate (IcC-PC), and BPA-PC/IcC-PC reactive blends were systematically investigated. The terminal hydroxyl groups of BPA-PC, thermally derived chemical structure on IcC-PC chains, and derivatives from phosphite antioxidants trigger severe hydrolysis degradation. ¹H-NMR analysis shows that carbonate groups connected to the BPA unit are most susceptible to hydrolysis, followed by ISB and CHDM units, demonstrating that the acidity of monomers plays a key role in the hydrolysis degradation of polycarbonates. Residual catalysts may cause significant hydrolysis in BPA-PC/IcC-PC reactive blends. Hydrolysis prefers to occur on the exo position of ISB unit with a low steric hindrance rather than on the endo position with a high electrophilicity, indicating that the residual catalyst acts as a Lewis acid and likely promotes hydrolysis through coordination mechanism. The hydrolysis resistance of BPA-PC/IcC-PC blends with a Na-based catalyst is lower than that of blends with K- and Cs-based catalysts because of the strong coordination ability.

-双酚A聚碳酸酯（BPA-PC），异山梨醇（ISB）的水解降解共-1,4-环己烷二甲醇（CHDM）的聚碳酸酯（Ⅰ ç C-PC），和BPA-PC / I ç C-PC反应性共混物进行了系统的调查。BPA-PC 的末端羟基、I c C-PC 链上的热衍生化学结构以及亚磷酸酯抗氧化剂的衍生物会引发严重的水解降解。¹ H-NMR 分析表明，连接到 BPA 单元的碳酸酯基团最容易水解，其次是 ISB 和 CHDM 单元，表明单体的酸度在聚碳酸酯的水解降解中起着关键作用。残留的催化剂可能会导致 BPA-PC/I c 中的显着水解C-PC 反应混合物。水解更倾向于发生在具有低位阻的 ISB 单元的外位，而不是具有高亲电性的内位，这表明残留的催化剂充当路易斯酸并可能通过配位机制促进水解。由于配位能力强，BPA-PC/I c C-PC 与 Na 基催化剂的共混物的耐水解性低于 K 和 Cs 基催化剂的共混物。