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  From strong to fragile glass formers: Secondary relaxation in polyalcohols

Döß, A., Paluch, M., Sillescu, H., & Hinze, G. (2002). From strong to fragile glass formers: Secondary relaxation in polyalcohols. Physical Review Letters, 88(9): 095701.

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 Creators:
Döß, A., Author
Paluch, M.1, Author           
Sillescu, H., Author
Hinze, G., Author
Affiliations:
1MPI for Polymer Research, Max Planck Society, ou_1309545              

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 Abstract: We have studied details of the molecular origin of slow secondary relaxation near T-g in a series of neat polyalcohols by means of dielectric spectroscopy and H-2 NMR. From glycerol to threitol, xylitol, and sorbitol the appearance of the secondary relaxation changes gradually from a wing-type scenario to a pronounced beta peak. It is found that in sorbitol the dynamics of the whole molecule contributes equally to the beta process, while in glycerol the hydrogen bond forming OH groups remain rather rigid compared to the hydrogens bonded to the carbon skeleton.

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Language(s): eng - English
 Dates: 2002-03-04
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: No review
 Identifiers: eDoc: 28541
ISI: 000174212100043
Other: P-02-178
 Degree: -

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Title: Physical Review Letters
  Alternative Title : Phys. Rev. Lett.
Source Genre: Journal
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Pages: - Volume / Issue: 88 (9) Sequence Number: 095701 Start / End Page: - Identifier: ISSN: 0031-9007