Relaxation nuclear magnetic resonance imaging investigation of heterogeneous aging in a hydroxy-terminated polybutadiene-based elastomer

T. M. Alam, B. R. Cherry, K. R. Minard, M. Celina

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

Relaxation nuclear magnetic resonance imaging (R-NMRI) was employed to investigate the effects of thermooxidative aging in a hydroxy-terminated polybutadiene (HTPB)-based elastomer. A series of three-dimensional (3D) Hahn-echo-weighted single-point images (SPD of the elastomer were utilized to generate a 3D parameter map of the aged material. NMR spin-spin relaxation times (T 2) were measured for each voxel producing a 3D NMR parameter (T 2) map of the aged polymer. These T 2 maps reveal a dramatic reduction of local polymer mobility near the aging surface with the degree of T 2 heterogeneity varying as a function of aging. Using correlations between NMR T 2 and material modulus, the impact of this heterogeneous thermooxidative aging on the material properties is discussed.

Original languageEnglish (US)
Pages (from-to)10694-10701
Number of pages8
JournalMacromolecules
Volume38
Issue number26
DOIs
StatePublished - Dec 27 2005

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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