Collision induced dissociation study of ester-based polyurethane fragmentation reactions

•The first polyurethane (PUR) study using MS/MS and ion mobility separations.•MS/MS distinguish the degree of “blockiness” within hard- and soft-block PURs.•Ion mobility separations validated long-chain MDI hard block formation. A combination of matrix-assisted laser desorption/ionization time-of-fl...

Full description

Saved in:
Bibliographic Details
Published in:Analytica chimica acta 2014-01, Vol.808, p.199-219
Main Authors: Gies, Anthony P., Hercules, David M.
Format: Article
Language:English
Subjects:
CID fragmentation
Fragmentation
Ion mobility separations
Ionic mobility
Ionization
MALDI
Mathematical models
MDI
Polyurethane resins
Polyurethanes
Position (location)
Separation
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The first polyurethane (PUR) study using MS/MS and ion mobility separations.•MS/MS distinguish the degree of “blockiness” within hard- and soft-block PURs.•Ion mobility separations validated long-chain MDI hard block formation. A combination of matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS) collision induced dissociation (CID) and ion mobility separations (IMS) was used to study a complex mixture composed of unreacted polyester starting material (polybutylene adipate) and polyurethane (PUR) end products. Collision induced dissociation fragmentation identified two primary fragmentation mechanisms of PURs, which were used to generate a general fragmentation model. Predicted fragment ions were used to distinguish: (1) linear and cyclic PURs, (2) hard-block and soft-block PURS, (3) the degree of “blockiness” within hard- and soft-block PURs, (4) the location of the MDI linkages within each PUR chain, and (5) the relative intensities of various isobars intermingled within a precursor mass peak. These results were consistent with the observed IMS separations.
ISSN:0003-2670
1873-4324
DOI:10.1016/j.aca.2013.09.035