In Defense of Vapor Pressure Osmometry for Measuring Molecular Weight
โ Scribed by Wiehe, Irwin A.
- Book ID
- 126569361
- Publisher
- Taylor and Francis Group
- Year
- 2007
- Tongue
- English
- Weight
- 267 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0193-2691
No coin nor oath required. For personal study only.
๐ 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
## Abstract Experimental molecular weights in the range 200 to 100,000 Daltons have been determined by vapor pressure osmometry using three different solvents. For all values in excess of 10,000, molecular weights were also determined by membrane osmometry. The general agreement found for molecular