Surface analysis of poly(ether imide) by inverse gas chromatography

In this work, the surface properties of poly(ether imide) (Ultem) were analyzed by inverse gas chromatography. Four nalkanes (n-C7, n-C8, n-C9 and n-C10) were chosen as nonpolar probes to characterize the surface dispersive free energy at different temperatures. The retentions of tetrahydrofurane, dichloromethane, chloroform, ethyl acetate and diethyl ether on Ultem were measured in the temperature range from 303.2 K to 328.2 K by inverse gas chromatography. The dispersive component of the surface free energy, D S γ of studied adsorbent surface was estimated using retention times of different