Hansen Solubility Parameters of Cellulose Acetate Phthalate-Polycaprolactonediol Blend by Inverse Gas Chromatography

Abstract

The specific retention volumes, V 0 g , for 21 solute probes in a cellulose acetate phthalate (CAP)-polycaprolactonediol (PCLD) blend were determined by inverse gas chromatography (IGC) in the temperature range 323.15-413.15 K. The retention diagrams drawn between lnV 0 g vs. 1 T revealed the presence of the glass transition temperature at about 373 K. Therefore, the Flory-Huggins interaction parameters at infinite dilution, χ ∞ 12 , were calculated using V 0 g values in the temperature range 373.15-413.15 K. The χ ∞ 12 values decreased with increase of temperature for all the solutes. Further, the χ ∞ 12 values decreased with decrease of chain length of n-alkanes whereas in 1-alcohols the trend was reversed. The Hansen solubility parameters (HSP) were determined in the temperature range 373.15-413.15 K following the Flory-Huggins solution model. The dispersive and polar components of the HSP decreased with increase of temperature whereas the hydrogen bonding component slightly increased with increase of temperature.