Investigation of thermodynamic properties of agar via inverse gas chromatography

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ÇELİK S., ERDOĞAN ÇAKAR A., UĞRAŞKAN V., YAZICI Ö.

Journal of Polymer Research, cilt.33, sa.2, 2026 (SCI-Expanded, Scopus)

• Yayın Türü: Makale / Tam Makale
• Cilt numarası: 33 Sayı: 2
• Basım Tarihi: 2026
• Doi Numarası: 10.1007/s10965-026-04805-w
• Dergi Adı: Journal of Polymer Research
• Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Chemical Abstracts Core, Compendex, INSPEC
• Anahtar Kelimeler: Agar, Biopolymer, Inverse gas chromatography, Polymer-solvent interactions, Surface properties
• Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this study, the thermodynamic properties of agar were examined by the inverse gas chromatography method. The dispersive surface energy, of the adsorbent was determined using the Schultz, Dorris–Gray, Donnet–Park, and Hamieh methods in the temperature range of 303.2–328.2 K. To evaluate the polymer-solvent interaction parameters, the specific retention volume of the solvents, values were determined using various nonpolar and polar solvents in the temperature range of 373.2–398.2 K. Then, from these data, the values ​​of the Flory-Huggins theory polymer-solvent interaction parameters,, equation of state theory, polymer-solvent interaction parameters,, effective exchange energy parameters, and solubility parameter of agar, were calculated. Additionally, the isomer separation power of agar, was assessed with selected isomer pairs in the temperature range of 303.2–333.2 K.