Work

Length Scale of Dynamic Heterogeneities at the Glass Transition Determined by Multidimensional Nuclear Magnetic Resonance

Year: 1998

Type: article

Abstract: We directly measure the equilibrium length scale of dynamic heterogeneities close to the glass transition by means of a new multidimensional NMR experiment. The spatial information is gained from a proton spin diffusion experiment combined with two 2D ${}^{13}\mathrm{C}$ exchange sequences via appropriate back and forth transfer of magnetization between ${}^{13}\mathrm{C}$ and ${}^{1}\mathrm{H}$ spins. For poly(vinyl acetate) at 10 K above the glass transition we detected a length scale of $3\ifmmode\pm\else\textpm\fi{}1\mathrm{nm}$.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.81.2727

Authors: U. Tracht, M. Wilhelm, A. Heuer, H. Feng, K. Schmidt-Rohr, H. W. Spiess

Institutions: Max Planck Society, Max Planck Institute for Polymer Research, University of Massachusetts Amherst

Language: English

Topic: Material Dynamics and Properties

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W1993826366

FWCI: 19.4

Cites: 23

Cited by: 563

Related to: 10