Antiplasticizing effect of triethyl citrate on an isosorbide-based polycarbonate.

Han, Ruiqi; Kida, Takumitsu; Yamaguchi, Masayuki

The effects of triethyl citrate (TEC) on the viscoelastic properties of a copolycarbonate comprising isosorbide and 1,4-cyclohexanedimethanol (ISB-PC) were studied in both the molten and solid states. TEC acted as an antiplasticizer for ISB-PC and increased its modulus in the glassy state, as demonstrated in blends comprising 5 and 10 wt% TEC. Because antiplasticization reduces the free volume fraction, the water content of the copolycarbonate films, which is known to affect various properties, decreased following the addition of TEC. Furthermore, TEC greatly decreased the zero-shear viscosity. The experimental values were much lower than those predicted by the Berry–Fox formula. In other words, a small amount of TEC greatly enhances the flowability of ISB-PC.

RHEOLOGY; PLASTICIZERS; CITRATES; VISCOSITY; POLYCARBONATES; SOLIDS

Journal of Polymer Research, 2024, Vol 31, Issue 8, p1

1022-9760

Academic Journal

10.1007/s10965-024-04059-4