Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.
F. CAKAR1, O. YAZICI1, D. SAKAR1, O. CANKURTARAN1,* , F. KARAMAN1
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, DγS of studied adsorbent surface was estimated using retention times of different nonpolar organics in the infinite dilution region. Thermodynamic parameters of adsorption (free energy, , Δ SAG enthalpy, SA H Δ and entrophy, SA ΔS ), dispersive components of the acid, K A and base, KD constants for the Ultem were calculated. The results mean that Ultem was a strong basic polymer..
Inverse gas chromatography, Ultem, Surface free energies, Lewis acid-base constants.
F. CAKAR, O. YAZICI, D. SAKAR, O. CANKURTARAN, F. KARAMAN, Surface analysis of poly(ether imide) by inverse gas chromatography, Optoelectronics and Advanced Materials - Rapid Communications, 5, 8, August 2011, pp.821-826 (2011).
Submitted at: March 8, 2011
Accepted at: Aug. 10, 2011
Optoelectronics and Advanced Materials - Rapid Communications
(2023): 0.5 - 2023 Journal Citation Reports (Clarivate Analytics, 2024)
Active accounts were imported to the new platform and assigned a random password by default. In order to access your account you need to access the login page and go through the Lost Password dialog (involves the system sending you an email with instructions) in order to reset your password. This step is necessary as passwords are kept in hashed form and the new platform uses modern hashing algorithms incompatible with the previous ones.