Some aspects of the estimation of M̄n by vapor pressure osmometry
✍ Scribed by Irena Kuchaříková
- Publisher
- John Wiley and Sons
- Year
- 1979
- Tongue
- English
- Weight
- 513 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
In this work, we determined the number average molecular weight of some polyethylene glycols (PEGs) using vapor pressure osmometry. In general, this technique works with a plot of Dr p /c p versus c p (concentration) and the molecular weight is determined by the calibration constant obtained from th
The Wescan Model 232-A' VPO was modified with a 12 volt regulated power supply for supplying bridge current and with thermocouples to allow for direct digital readout of the syringe box and measuring chamber temperatures. The modified instrument was used to measure m,, of standard (NBS) polyethylene