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Inverse gas chromatography of poly( n ‐butyl methacrylate): Effect of flow rate on specific retention volume and detection of glass transition temperature
Author(s) -
Tyagi O. S.,
Deshpande D. D.
Publication year - 1987
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1987.070340704
Subject(s) - inverse gas chromatography , glass transition , volume (thermodynamics) , dichloromethane , cyclohexane , volumetric flow rate , materials science , dilution , softening point , polymer , analytical chemistry (journal) , polymer chemistry , pentane , methacrylate , chemistry , thermodynamics , chromatography , organic chemistry , solvent , composite material , polymerization , physics
Abstract Flow‐rate effect on specific retention volume ( V g 0 ) was studied by eluting aliphatic, aromatic, and chlorinated aliphatic probes at infinite dilution on poly( n ‐butyl methacrylate) stationary phase at different temperatures from −10 to 150°C, encompassing both the glass transition ( T g ) and the softening temperatures of the polymer. The effect became pronounced as the temperature was reduced below 100°C. V g 0decreased with an increase in the flow rate: first linearly at temperatures between 70 and 100°C, and then nonlinearly at all temperatures below 70°C. The retention diagrams of n ‐pentane, isooctane, and cyclohexane alone enabled the detection of glass transition. Dichloromethane gave a linear retention diagram through T g without showing the flow‐rate effect.