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Title: Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber

Abstract

In this work, hydroxy-terminated polybutadiene/isophorone diisocyanate (HTPB/IPDI) polyurethane rubber which was aged in air at elevated temperatures has been studied by infrared microspectroscopy. Spectra were collected in transmission mode on microtomed samples. Analysis of sets of spectra taken across the sectioned material showed that most of the degradation occurred in the polybutadiene part of the polymer and that the urethane linkage was essentially unchanged. The trans isomer of the polybutadiene appears to be preferentially degraded compared with the vinyl isomer. The IR technique does not provide significant information about the cis isomer. The IR spectra indicated that likely degradation products included acids, esters, alcohols, and small amounts of other products containing a carbonyl functional group. Band area ratios, supported by a principal components analysis, were used to derive degradation profiles for the material. Lastly, these profiles were steep-sided indicating an oxygen diffusion limited process.

Authors:
 [1];  [2];  [1];  [1]
  1. Queensland University of Technology, Brisbane (Australia). School of Physical and Chemical Science
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1426960
Report Number(s):
SAND-2007-1362J
Journal ID: ISSN 0141-3910; 526777
Grant/Contract Number:  
AC04-94AL85000
Resource Type:
Accepted Manuscript
Journal Name:
Polymer Degradation and Stability
Additional Journal Information:
Journal Volume: 92; Journal Issue: 8; Journal ID: ISSN 0141-3910
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; 36 MATERIALS SCIENCE; Polyurethane; Butadiene; FTIR; Microspectroscopy; Oxidation

Citation Formats

Nagle, Dylan J., Celina, Mathew, Rintoul, Llewellyn, and Fredericks, Peter M. Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber. United States: N. p., 2007. Web. doi:10.1016/j.polymdegradstab.2007.05.010.
Nagle, Dylan J., Celina, Mathew, Rintoul, Llewellyn, & Fredericks, Peter M. Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber. United States. doi:10.1016/j.polymdegradstab.2007.05.010.
Nagle, Dylan J., Celina, Mathew, Rintoul, Llewellyn, and Fredericks, Peter M. Mon . "Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber". United States. doi:10.1016/j.polymdegradstab.2007.05.010. https://www.osti.gov/servlets/purl/1426960.
@article{osti_1426960,
title = {Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber},
author = {Nagle, Dylan J. and Celina, Mathew and Rintoul, Llewellyn and Fredericks, Peter M.},
abstractNote = {In this work, hydroxy-terminated polybutadiene/isophorone diisocyanate (HTPB/IPDI) polyurethane rubber which was aged in air at elevated temperatures has been studied by infrared microspectroscopy. Spectra were collected in transmission mode on microtomed samples. Analysis of sets of spectra taken across the sectioned material showed that most of the degradation occurred in the polybutadiene part of the polymer and that the urethane linkage was essentially unchanged. The trans isomer of the polybutadiene appears to be preferentially degraded compared with the vinyl isomer. The IR technique does not provide significant information about the cis isomer. The IR spectra indicated that likely degradation products included acids, esters, alcohols, and small amounts of other products containing a carbonyl functional group. Band area ratios, supported by a principal components analysis, were used to derive degradation profiles for the material. Lastly, these profiles were steep-sided indicating an oxygen diffusion limited process.},
doi = {10.1016/j.polymdegradstab.2007.05.010},
journal = {Polymer Degradation and Stability},
number = 8,
volume = 92,
place = {United States},
year = {2007},
month = {5}
}

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