Zelek S. Herman, Robert F. Kirchner, et al.
Inorganic Chemistry
High-resolution 13C NMR spectra have been obtained for the insoluble, highly crystalline homopolymer of p-hydroxybenzoic acid, two methoxy derivatives of this polymer, and two copolymers with biphenylene terephthalate by use of proton dipolar decoupling, magic-angle spinning, and 13C crosspolarization techniques. Resolution is sufficient that the majority of carbons in the homopolymer repeat units appear as individual resonance lines. The widths of resonance lines (⪕15Hz) are 3-6 times more narrow than those obtained for glassy polymers—a result which is attributed to both the rigidity of these aromatic polyesters and the homogeneous local environment associated with crystal habit. © 1979, American Chemical Society. All rights reserved.
Zelek S. Herman, Robert F. Kirchner, et al.
Inorganic Chemistry
L.K. Wang, A. Acovic, et al.
MRS Spring Meeting 1993
Q.R. Huang, Ho-Cheol Kim, et al.
Macromolecules
Ronald Troutman
Synthetic Metals