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Title: Relaxation Nuclear Magnetic Resonance Imaging Investigation of Heterogeneous Aging in a Hydroxy-Terminated Polybutadiene-Based Elastomer

Abstract

Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to investigate the effects of thermo-oxidative aging in a hydroxy-terminated polybutadiene (HTPB) based elastomer. A series of three-dimensional (3D) Hahn-echo weighted single point images (SPI) of the elastomer were utilized to generate a 3D parameter map of the aged material. NMR spin-spin relaxation times (T2) were measured for each voxel producing a 3D NMR parameter (T2) map of the aged polymer. These T2 maps reveal a dramatic reduction of local polymer mobility near the aging surface with the degree of T2 heterogeneity varying as a function of aging. Using correlations between NMR T2 and material modulus, the impact of this heterogeneous thermo-oxidative aging on the material properties is discussed.

Authors:
; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
876975
Report Number(s):
PNNL-SA-46963
3790; 7594; KP1303000; TRN: US200608%%225
DOE Contract Number:
AC05-76RL01830
Resource Type:
Journal Article
Resource Relation:
Journal Name: Macromolecules; Journal Volume: 38; Journal Issue: 26
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; AGING; ELASTOMERS; NUCLEAR MAGNETIC RESONANCE; SPIN-SPIN RELAXATION; BUTADIENE; ORGANIC POLYMERS; Environmental Molecular Sciences Laboratory

Citation Formats

Alam, Todd M., Cherry, Brian R., Minard, Kevin R., and Celina, Mat C. Relaxation Nuclear Magnetic Resonance Imaging Investigation of Heterogeneous Aging in a Hydroxy-Terminated Polybutadiene-Based Elastomer. United States: N. p., 2005. Web. doi:10.1021/ma051906y.
Alam, Todd M., Cherry, Brian R., Minard, Kevin R., & Celina, Mat C. Relaxation Nuclear Magnetic Resonance Imaging Investigation of Heterogeneous Aging in a Hydroxy-Terminated Polybutadiene-Based Elastomer. United States. doi:10.1021/ma051906y.
Alam, Todd M., Cherry, Brian R., Minard, Kevin R., and Celina, Mat C. Tue . "Relaxation Nuclear Magnetic Resonance Imaging Investigation of Heterogeneous Aging in a Hydroxy-Terminated Polybutadiene-Based Elastomer". United States. doi:10.1021/ma051906y.
@article{osti_876975,
title = {Relaxation Nuclear Magnetic Resonance Imaging Investigation of Heterogeneous Aging in a Hydroxy-Terminated Polybutadiene-Based Elastomer},
author = {Alam, Todd M. and Cherry, Brian R. and Minard, Kevin R. and Celina, Mat C.},
abstractNote = {Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to investigate the effects of thermo-oxidative aging in a hydroxy-terminated polybutadiene (HTPB) based elastomer. A series of three-dimensional (3D) Hahn-echo weighted single point images (SPI) of the elastomer were utilized to generate a 3D parameter map of the aged material. NMR spin-spin relaxation times (T2) were measured for each voxel producing a 3D NMR parameter (T2) map of the aged polymer. These T2 maps reveal a dramatic reduction of local polymer mobility near the aging surface with the degree of T2 heterogeneity varying as a function of aging. Using correlations between NMR T2 and material modulus, the impact of this heterogeneous thermo-oxidative aging on the material properties is discussed.},
doi = {10.1021/ma051906y},
journal = {Macromolecules},
number = 26,
volume = 38,
place = {United States},
year = {Tue Dec 27 00:00:00 EST 2005},
month = {Tue Dec 27 00:00:00 EST 2005}
}