Phys. Rev. Lett. 81, 2727–2730 (1998)Length Scale of Dynamic Heterogeneities at the Glass Transition Determined by Multidimensional Nuclear Magnetic ResonanceReceived 18 December 1997; published in the issue dated 28 September 1998 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 13C exchange sequences via appropriate back and forth transfer of magnetization between 13C and 1H spins. For poly(vinyl acetate) at 10 K above the glass transition we detected a length scale of 3±1nm. © 1998 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.81.2727
DOI:
10.1103/PhysRevLett.81.2727
PACS:
64.70.Pf, 76.60.-k
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.