Inverse gas chromatography of poly(n-butyl methacrylate): Effect of flow rate on specific retention volume and detection of glass transition temperature
✍ Scribed by O. S. Tyagi; D. D. Deshpande
- Publisher
- John Wiley and Sons
- Year
- 1987
- Tongue
- English
- Weight
- 617 KB
- Volume
- 34
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
✦ Synopsis
Flow-rate effect on specific retention volume (5O) 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 ( 7 ' ' )
and the softening temperatures of the polymer. The effect became pronounced as the temperature was reduced below 100°C. 5' decreased 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 ' without showing the flow-rate effect.