Synthesis and properties of poly(1,4-cyclohexanedicarboxylic anhydride)

Polyanhydrides from cycloaliphatic 1,4-Cyclohexanedicarboxylic acid (1,4-CH DA) were synthesized by melt polycondensation and characterized by WAXD, FT IR and DSC. The results show that these polymer displayed strong crystallin ity with highly melting point and can't be dissolved in common solvents. Th e polymers, which come from different original isomer conformation CHDA, sh ow different melting point and DSC curve. The isomerization happened during the polymerization and reached an equilibrium paint at last. By melt polyc ondensation, the high cis-isomer content polyanhydride is difficult to obta ined.