High Resolution Mass Spectrometry of Polyfluorinated Polyether-Based Formulation

Area of Science:

• Analytical Chemistry
• Polymer Science
• Mass Spectrometry

Background:

• Polyfluorinated polyethers (PFPEs) are widely used industrial fluids.
• Accurate structural elucidation of PFPEs is crucial for understanding their properties and applications.
• Existing characterization methods may have limitations in resolving complex PFPE structures.

Purpose of the Study:

• To apply high-resolution mass spectrometry (HRMS) for detailed structural analysis of a PFPE-based formulation.
• To identify repeating units, end groups, and their distribution within the PFPE polymer.
• To establish a robust analytical approach for PFPE characterization.

Main Methods:

• Direct injection HRMS for mass spectral data acquisition.
• Manual and automated analysis of mass spectra to identify repeating units (-C2H4O-, -C2F4O-, -CF2O-).
• Tandem MS for end-group identification (phosphates) and unit distribution analysis.
• Reversed-phase HPLC for polymer separation based on nonpolar repeating units.

Main Results:

• Successfully elucidated the structure of a PFPE formulation using HRMS.
• Identified three major repeating units and phosphate end groups.
• Quantified the number of repeating units per molecule.
• HPLC confirmed separation based on polymer structure.

Conclusions:

• HRMS provides a powerful tool for detailed PFPE structural characterization.
• The developed analytical approach is applicable to various PFPE and other fluorinated/non-fluorinated polymers.
• Accurate structural information is vital for assessing PFPE physico-chemical properties and potential risks.