Dismiss
The InnovationQ application will be updated on Sunday, May 31st from 10am-noon ET. You may experience brief service interruptions during that time.
Browse Prior Art Database

NMR Analysis of Polyimides

IP.com Disclosure Number: IPCOM000046882D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07

Publishing Venue

IBM

Related People

Authors:
Jackson, MD [+details]

Abstract

Nuclear magnetic resonance (NMR) spectroscopy is an established technique used by chemists for structure determinations. It can be used to obtain formation of the bulk chemical structure and chain dynamics of polyimides and other nitrogen-containing polymers. One of the primary nuclei of interest has been carbon-13 (13C). Unfortunately 13C spectra of polyimides or, in fact, any nitrogen-containing polymer are not well resolved, especially peaks for carbons attached to nitrogen, due to the quadrupole moment of nitrogen-14 (14N). With poor resolution, it becomes very difficult to obtain detailed information on the chemical structure and chain dynamics of a polymer. This problem might be overcome by using a nitrogen-15 (15N)-enriched (99% atom enrichment) polyimide or other polymer for the solid-state NMR studies.