Synthesis of hyperbranched polycarbonate by novel polymerization of di-tert-butyl tricarbonate with 1,1,1-tris(4-hydroxyphenyl)ethane

Abstract

Hyperbranched polycarbonates (HBPCs) with Mn = 2.1-7.1 × 103 were synthesized by A2+B3 polymerization using di-tert-butyl tricarbonate as the A2 monomer and 1,1,1-tris(4-hydroxyphenyl)ethane as the B3 monomer. A 2+B3 polymerization with different feed ratios was achieved, controlling the degree of branching (DB) and the ratio of terminal functional groups. The DB of the HBPCs is 0.5-0.7. The Boc-terminated PC was prepared by either a 1-pot or a 2-pot synthesis. In contrast, PC with terminal phenol groups was prepared by deprotection of Boc-terminated PC. © The Society of Polymer Science, Japan (SPSJ) All rights reserved.