This paper presents the first neutron scattering measurement of 1,2‐1,4‐polybutadienes with varying microstructure. Incoherent inelastic scattering experiments have been performed in the range of moderate (ΔE≊300 μeV) and high (ΔE≊20 μeV) energy resolution. For the moderate resolution experiments the vibration–relaxation model has been used as a guideline for interpretation. The most striking influence of the microstructure variation can be found in the position of the boson peak. Its position at low temperature as well as its temperature dependence is significantly different among the measured samples. The high resolution data have been Fourier transformed into the time domain yielding the intermediate incoherent scattering function in a time range of 5,...,150 ps. There, the basic properties found for 1,4‐polybutadiene earlier could be reproduced (separation of α and βslow regimes of the slow relaxation, Kohlrausch–Williams–Watts function with β≊0.4). On the basis of the new data, no microstructure induced differences can be detected except for the changes of temperature dependence due to the strongly different glass‐transition temperatures and different fragility.
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15 July 1996
Research Article|
July 15 1996
Influence of the microstructure on the incoherent neutron scattering of glass‐forming polybutadienes
Reiner Zorn;
Reiner Zorn
Forschungszentrum Jülich, IFF, D‐52425 Jülich, Germany
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Toshiji Kanaya;
Toshiji Kanaya
Institute for Chemical Research, Kyoto University, Uji, Kyoto‐fu 611, Japan
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Tatsuya Kawaguchi;
Tatsuya Kawaguchi
Institute for Chemical Research, Kyoto University, Uji, Kyoto‐fu 611, Japan
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Dieter Richter;
Dieter Richter
Forschungszentrum Jülich, IFF, D‐52425 Jülich, Germany
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Keisuke Kaji
Keisuke Kaji
Institute for Chemical Research, Kyoto University, Uji, Kyoto‐fu 611, Japan
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J. Chem. Phys. 105, 1189–1197 (1996)
Article history
Received:
February 28 1996
Accepted:
April 02 1996
Citation
Reiner Zorn, Toshiji Kanaya, Tatsuya Kawaguchi, Dieter Richter, Keisuke Kaji; Influence of the microstructure on the incoherent neutron scattering of glass‐forming polybutadienes. J. Chem. Phys. 15 July 1996; 105 (3): 1189–1197. https://doi.org/10.1063/1.471961
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