This application note provides a detailed method for the determination of water content in polyols using both volumetric and coulometric Karl Fischer (KF) titration. The method developed is in accordance with ASTM D4672-12.
Why Is It Important to Determine Water in Polyols?
Polyurethanes, which are polymers, are produced by combining an isocyanate with alcohols containing multiple hydroxyl groups. These materials are widely used in furniture, bedding, and carpet underlay, among other applications. The purity of the materials used heavily influences the quality of polyurethane. Polyols absorb moisture from the air due to their hygroscopic nature. Given that isocyanate reacts with water, the water content of raw polyols is a crucial factor in ensuring consistent quality during the production of polyurethane—hence its determination is essential.
What Is in This Application Note?
When it comes to measuring the water content of a sample, the Karl Fischer method is widely regarded as the best option. A comprehensive approach involving volumetric and coulometric Karl Fischer titration is provided to determine the water content in polyols. Both techniques have been shown to produce consistent results.
To minimize errors that may arise during the analysis, an External SmartChemical Reader is employed to transfer reagent data and monitor the shelf life and expiration date. This method is significantly faster and more efficient than manual data entry, which makes it more convenient for researchers and scientists.
This Application Note Includes
- An introduction to the method
- Sample preparation and procedures
- Solutions and chemicals
- Chemistry
- Instruments and accessories
- Results and remarks
Method files (.lmt and .xml) are also included for direct import and implementation of the instrument.
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