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The process for the synthesis of high-molecular-weight poly(bisphenol A carbonate) (PBC) by the solid-state postpolycondensation (SSP) process using 5-20 wt % of thermally unstable poly(propylene carbonate) (PPC) was investigated and compared with the analogous process without addition of the thermally unstable polymer. An application of poly(propylene carbonate) for the SSP process was found to enable...