Structural Analysis of Biomer by Pyrolysis Mass Spectrometry and Thermogravimetry

Published

Journal Article

Curie-point pyrolysis mass spectrometry (Py-MS) was used to identify the polymeric components of the poly(ether urethane urea) Biomer, which is widely used in the construction of artificial heart chambers. A comparative study between Biomer and model polymers showed Biomer to be composed of poly(tetramethylene glycol) (PTMG) capped with 4,4'-methylenebis(phenyl isocyanate) (MDI) and chain-extended with ethylenediamine (EDA). As determined from thermogravimetry (TG) and 1H NMR data the PTMG molecular weight appears to be approximately 1000 and the PTMG:MDI molar ratio 2:3. An overall pyrolysis mechanism is proposed which postulates initial scission of urea links followed by cleavage of the urethane bonds and subsequent decomposition of the polyether chains. © 1985, American Chemical Society. All rights reserved.

Full Text

Duke Authors

Cited Authors

  • Richards, JM; McClennen, WH; Meuzelaar, HLC; Gregonis, DE; Reichert, WM; Helle, MA

Published Date

  • January 1, 1985

Published In

Volume / Issue

  • 18 / 3

Start / End Page

  • 496 - 500

Electronic International Standard Serial Number (EISSN)

  • 1520-5835

International Standard Serial Number (ISSN)

  • 0024-9297

Digital Object Identifier (DOI)

  • 10.1021/ma00145a032

Citation Source

  • Scopus