Temperature dependence of the segmental dynamics in polyisobutylene melts

V. Arrighi, A. Triolo, H. Qian

Research output: Contribution to journalArticle

Abstract

We report a study of the local dynamics in polyisobutylene (PIB) melts using quasi-elastic neutron scattering (QENS). QENS measurements were carried out on the high resolution back-scattering spectrometer IRIS (ISIS) in the temperature range 300-460 K. The QENS data were analysed in the time domain, in order to extract information on the a-process in PIB. We show that time-temperature superposition is obeyed. The temperature dependence of the shift factors derived by QENS is in good agreement with 13C NMR and ESR literature data. However, the temperature dependence of the molecular motion observed by QENS differs considerably from the one determined from viscosity and neutron spin echo measurements. © 2002 Published by Elsevier Science B.V.

Original languageEnglish
Pages (from-to)654-657
Number of pages4
JournalJournal of Non-Crystalline Solids
Volume307-310
DOIs
Publication statusPublished - Sep 2002

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polyisobutylene
elastic scattering
neutron scattering
temperature dependence
echoes
spectrometers
viscosity
neutrons
nuclear magnetic resonance
temperature
shift
high resolution
scattering

Cite this

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title = "Temperature dependence of the segmental dynamics in polyisobutylene melts",
abstract = "We report a study of the local dynamics in polyisobutylene (PIB) melts using quasi-elastic neutron scattering (QENS). QENS measurements were carried out on the high resolution back-scattering spectrometer IRIS (ISIS) in the temperature range 300-460 K. The QENS data were analysed in the time domain, in order to extract information on the a-process in PIB. We show that time-temperature superposition is obeyed. The temperature dependence of the shift factors derived by QENS is in good agreement with 13C NMR and ESR literature data. However, the temperature dependence of the molecular motion observed by QENS differs considerably from the one determined from viscosity and neutron spin echo measurements. {\circledC} 2002 Published by Elsevier Science B.V.",
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Temperature dependence of the segmental dynamics in polyisobutylene melts. / Arrighi, V.; Triolo, A.; Qian, H.

In: Journal of Non-Crystalline Solids, Vol. 307-310, 09.2002, p. 654-657.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Temperature dependence of the segmental dynamics in polyisobutylene melts

AU - Arrighi, V.

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AU - Qian, H.

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