Polyvinyl alcohols (PVA) are industrially synthesized by the catalytic reaction of polyvinyl acetates with alcohols, typically methanol. Due to properties such as excellent biological degradeability, water solubility , toxilogical harmlessness they are widely used as emulgators, binding agents in adhesives, salves and haircream. The properties can be varied with the molecular weight distribution and the molecular weight which ranges from 20000 to 100000 g/mol. Both parameters can be fast and reliably monitored by aqueous SEC. This is a convenient method for quality control analyis, and is more informative in production control and end-use performance evaluation than single- point viscosity measurements.
This document details the analysis of polyvinyl alcohol (PVA) using aqueous Size Exclusion Chromatography (SEC). It highlights that PVA properties, such as molecular weight distribution, can be monitored effectively using this method for quality control and performance evaluation. The text outlines the specific sample preparation, column configuration, and mobile phase conditions used for the analysis.
| Mobile phase | 0.2 M NaNOHs, NaH,PQ,, pH 7 |
|---|---|
| Flow rate | 1 mL/min |
| RSD of My | <1.5 % |
| RSD of M | <3 % |
The flow rate used in the analysis is 1 mL/min.
The flow rate for the analysis is set to 1 mL/min.