![Sample our Physical Sciences journals, sign in here to start your FREE access for 14 days]({"type":"image" , "src" : "/sda/110819/TOC-Subject-Sample-2021-Physical-Sciences.jpg"})
Abstract
The specific retention volumes, 
, for adsorption of 21 solute probes on the solid surface of cellulose acetate butyrate (CAB) were determined in the temperature range 343.15 to 403.15 K by inverse gas chromatography (IGC). The weight fraction activity coefficients, 
, and Flory–Huggins interaction parameters, 
, were evaluated using 
. Both 
and 
values decreased with increase of temperature in all the solutes. Further, the 
values increased with increase of chain length in n-alkanes, but in the case of alcohols the trend was reversed. 
values were less than 0.5 in polar solutes and greater than 0.5 in 1-alkanes and alcohols. The Hansen solubility parameters (HSP) were calculated by relating 
with the cohesive energy of adsorption of the solutes on the surface of CAB. The adsorption model proposed by Snyder and Karger was used to determine the HSP for the CAB. The dispersive, 
, polar, 
, and hydrogen bonding 
components of HSP decreased with increase of temperature and the relative error associated with these parameters increased with increase of temperature. The characterization of the solid surface of CAB in terms of the three solubility parameter components was analyzed and is discussed.
Acknowledgement
The authors (TVMS and KSR) are grateful to the University Grants Commission, New Delhi, for financial support sanctioned in the form of a research project.
Notes
*Extrapolated data.