M. Jayakannan and P. Anilkumar
The reactive blending of bisphenol A polycarbonate (PC) with poly(1,4-cyclohexanedimethylene-1,4-cyclohexanedicarboxylate) (PCCD) was investigated with NMR and Fourier transform infrared spectroscopy. Model reactions were carried out through the reaction of PC with 1,4-dimethylcyclohexanedicarboxylate, 1,4-cyclohexanedicarboxylic acid, and 1,4-cyclohexanedimethanol to study the tendency of polyester chain-end reactions such as transesterification, acidolysis, and alcoholysis. These model reactions revealed that the reactive blending was affected by both alcoholysis and transesterification, whereas acidolysis was absent. NMR analysis confirmed that in PC/PCCD reactive blending, the exchange reaction predominantly occurred in the polymer main chains, and the influence of the end groups was insignificant.