Temperature dependence of the segmental dynamics in polyisobutylene melts

V. Arrighi; A. Triolo; H. Qian

doi:10.1016/S0022-3093(02)01518-1

Temperature dependence of the segmental dynamics in polyisobutylene melts

V. Arrighi, A. Triolo, H. Qian

School of Engineering & Physical Sciences

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

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 language	English
Pages (from-to)	654-657
Number of pages	4
Journal	Journal of Non-Crystalline Solids
Volume	307-310
DOIs	https://doi.org/10.1016/S0022-3093(02)01518-1
Publication status	Published - Sept 2002

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10.1016/S0022-3093(02)01518-1

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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. {\textcopyright} 2002 Published by Elsevier Science B.V.",

author = "V. Arrighi and A. Triolo and H. Qian",

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doi = "10.1016/S0022-3093(02)01518-1",

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T1 - Temperature dependence of the segmental dynamics in polyisobutylene melts

AU - Arrighi, V.

AU - Triolo, A.

AU - Qian, H.

PY - 2002/9

Y1 - 2002/9

N2 - 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.

AB - 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.

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U2 - 10.1016/S0022-3093(02)01518-1

DO - 10.1016/S0022-3093(02)01518-1

M3 - Article

SN - 0022-3093

VL - 307-310

SP - 654

EP - 657

JO - Journal of Non-Crystalline Solids

JF - Journal of Non-Crystalline Solids

ER -

Temperature dependence of the segmental dynamics in polyisobutylene melts

Abstract

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