DOI: 10.1063/1.464531. Low-energy excitation and fast motion near T g in amorphous cis-1,4-polybutadiene

Low-energy excitation and fast motion near T g in amorphous cis-1,4-polybutadiene

10.1063/1.464531

Crossref journal-article

AIP Publishing

The Journal of Chemical Physics (317)

Abstract

Dynamics of amorphous cis-1,4-polybutadiene was studied by incoherent inelastic and quasielastic neutron scattering below 10 meV in a wide temperature range covering the glass transition temperature Tg. The spectra at low temperatures below Tg show a broad excitation peak at about 2–3 meV, which is the so-called low-energy excitation and believed to be an origin of anomalous thermal properties of amorphous materials at low temperatures. It was found that the temperature dependence of the low-energy excitation intensity can be normalized by the Bose factor at temperatures low enough below Tg. With increasing temperature, a very fast motion appears in the energy range below ∼4 meV at around the Vogel–Fulcher temperature T0, which is ∼50 K below Tg. This fast motion is often interpreted as the β process predicted by the mode coupling theory. In this paper, both the low-energy excitation and the fast motion were analyzed in terms of a common microscopic picture, i.e., an asymmetric double well potential. The natures of the two motions are discussed focusing on the relation between the two motions as well as the glass transition dynamics.

Bibliography

Kanaya, T., Kawaguchi, T., & Kaji, K. (1993). Low-energy excitation and fast motion near T g in amorphous cis-1,4-polybutadiene. The Journal of Chemical Physics, 98(10), 8262â8270.

Authors 3

Toshiji Kanaya (first)
Tatsuya Kawaguchi (additional)
Keisuke Kaji (additional)

References 55 Referenced 55

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 8:22 a.m.)
Deposited	1 year, 6 months ago (Feb. 10, 2024, 1:42 p.m.)
Indexed	1 year, 6 months ago (Feb. 24, 2024, 11:46 a.m.)
Issued	32 years, 3 months ago (May 15, 1993)
Published	32 years, 3 months ago (May 15, 1993)
Published Print	32 years, 3 months ago (May 15, 1993)

Funders 0

None

BibTeX

@article{Kanaya_1993, title={Low-energy excitation and fast motion near T g in amorphous cis-1,4-polybutadiene}, volume={98}, ISSN={1089-7690}, url={http://dx.doi.org/10.1063/1.464531}, DOI={10.1063/1.464531}, number={10}, journal={The Journal of Chemical Physics}, publisher={AIP Publishing}, author={Kanaya, Toshiji and Kawaguchi, Tatsuya and Kaji, Keisuke}, year={1993}, month=may, pages={8262–8270} }

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    "primary": {
      "URL": "https://pubs.aip.org/jcp/article/98/10/8262/894105/Low-energy-excitation-and-fast-motion-near-Tg-in"
    }
  },
  "subtitle": [],
  "short-title": [],
  "issued": {
    "date-parts": [
      [
        1993,
        5,
        15
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    ]
  },
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  "journal-issue": {
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  "URL": "http://dx.doi.org/10.1063/1.464531",
  "relation": {},
  "ISSN": [
    "0021-9606",
    "1089-7690"
  ],
  "subject": [],
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