Synthesis of Thermosetting Polycarbonate with Ethynyl Terminals

Abstract

Thermosetting bisphenol A-carbonate resins with ethynyl and phenylethynyl terminals were successfully developed via an activated transcarbonate reaction. The terminal transformation efficiency from OH into ethynyl function was 74 to 87% determined by 1 H NMR spectroscopy, and the resin was sufficiently crosslinked with annealing treatment over 240°C. The glass transition temperature increased from 109 to 162°C with the char yield of 26% at 800°C.