Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber
(2007) Infrared microspectroscopic study of the thermo-oxidative degradation of hydroxy-terminated polybutadiene/isophorone diisocyanate polyurethane rubber. Polymer Degradation and Stability 92(8):pp. 1446-1454.
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Abstract
Hydroxy-terminated polybutadiene/isophorone diisocyanate (HTPB-IPDI) polyurethane rubber that 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 was occurring 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. These profiles were steep-sided indicating an oxygen diffusion limited process.
| Item Type: | Journal Article |
|---|---|
| Status: | Published |
| Keywords: | polyurethane, butadiene, FTIR, microspectroscopy, oxidation |
| Subjects: | 210000 Science - General |
| ID Code: | 8937 |
| Deposited By: | Fredericks, Peter M |
| Deposited On: | 10 August 2007 |
| Alternative Locations: | http://dx.doi.org/10.1016/j.polymdegradstab.2007.05.010 |
| Copyright Owner: | Copyright 2007 Elsevier |
| Copyright Statement: | Reproduced in accordance with the copyright policy of the publisher. |