Presentation Profile
A Novel Method for the Preparation and Characterization of Single Molecular Weight Polyurethanes: A Preliminary Ion Mobility and Mass Spectrometry Study
Currently Scheduled: 10/12/2022 - 8:00 AM - 8:25 AM
Room: Wisteria
Main Author
David Hercules - Vanderbilt University
- Jody May - Vanderbilt University
- John McLean - Vanderbilt University
Abstract:
Polyurethanes (PURs) are produced by reacting methylene diphenyl diisocyanate (MDI) with low MW polyols which are distributions of multiple individual diols. The PUR oligomers consist of a mixture of structural isomers at each mass in the distribution. Isomers can be studied by using monodisperse, polyols. This approach becomes intractable for larger MW polyols. We demonstrate a straightforward synthesis approach for generating PUR oligomer distributions with unique numbers of polyol attachments. Four polyols (PEG, PPG, PTHF, and PBA) were reacted with phenyl isocyanante (PhNCO) to produce distributions of PUR oligomers exhibiting unique numbers of polyol attachments. Structural characterization by Ion mobility and high resolution mass spectrometry confirmed these PUR oligomers are monodisperse and MS/MS results indicated the products follow known fragmentation mechanisms.
