Identification of polymer building blocks by Py–GC/MS and MALDI-TOF MS. Issue 1 (2nd January 2018)

• Record Type: Journal Article
• Authors: Ren, Hongxin; Hu, Huilian; Yu, Bohao; Du, Yiping; Wu, Ting
• Is Part Of: International journal of polymer analysis and characterization. Volume 23:Issue 1(2018)
• Page Start: 9
• Page End: 17
• Publication Date: 2018-01-02
• Subjects: MALDI-TOF MS -- MDI -- polyurethane -- Py–GC/MS -- TDI; Polymers -- Analysis -- Periodicals; 547.705
• DOI: 10.1080/1023666X.2017.1362834
• Languages: English
• ISSNs: 1023-666X

Abstract

ABSTRACT: The main goal of this work is to identify polyurethane (PU) building blocks by pyrolysis gas chromatography/mass spectrometry (Py–GC/MS) and matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF MS). Toluene diisocyanate (TDI) and diphenylmethane diisocyanate (MDI) are widely used polymer building blocks. Py–GC/MS and MALDI-TOF MS were proved to be powerful methods to distinguish TDI-PU and MDI-PU according to the characteristic pyrolysis products and the different repeated units, respectively. In Py–GC/MS, the specific pyrolyzates are TDI for TDI-PU and MDI for MDI-PU. In MALDI-TOF MS, the weights of repeated units are 264 g/mol for TDI-PU and 340 g/mol for MDI-PU.