Accession Number : ADP003910

Title :   Deuteron NMR (Nuclear Magnetic Resonance) in Relation to the Glass Transition in Polymers,


Personal Author(s) : Roessler,E. ; Sillescu,H. ; Spiess,H. W. ; Wallwitz,R.

Report Date : 1983

Pagination or Media Count : 21

Abstract : H2NMR is introduced as a tool for investigating slow molecular motion in the glass transition region of amorphous polymers. In particular, we compare H2 spin alignment echo spectra of chain deuterated polystyrene with model calculations for restricted rotational Brownian motion. Molecular motion in the polystyrene-toluene system has been investigated by analysing H2NMR. of partially deuterated polystyrene and toluene, respectively. The diluent mobility in the mixed glass has been decomposed into solid and liquid components where the respective average correlation times differ by more than 5 decades. (Author)

Descriptors :   *Nuclear magnetic resonance, *Polymers, Glass, Transitions, Amorphous materials, Molecules, Motion, Toluenes, Liquids, Computations, Models, Brownian motion, Rotation

Distribution Statement : APPROVED FOR PUBLIC RELEASE