Quasielastic neutron scattering measurements of fast process and methyl group dynamics in glassy poly(vinyl acetate)

Chuhong Zhang; Valeria Arrighi; Simona Gagliardi; Iain J. McEwen; Jeerachada Tanchawanich; M. T F Telling; J. M. Zanotti

doi:10.1016/j.chemphys.2006.06.026

Quasielastic neutron scattering measurements of fast process and methyl group dynamics in glassy poly(vinyl acetate)

Chuhong Zhang, Valeria Arrighi, Simona Gagliardi, Iain J. McEwen, Jeerachada Tanchawanich, M. T F Telling, J. M. Zanotti

School of Engineering & Physical Sciences

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

14 Citations (Scopus)

Abstract

The dynamics of poly(vinyl acetate) (PVAc) in the glassy state has been investigated using a range of neutron spectrometers, sampling complementary energy and momentum transfer ranges. By combining the analysis of elastic window scan data at high resolution, medium resolution quasielastic neutron scattering (QENS) spectra and low resolution time-of-flight measurements we identify the molecular processes occurring in PVAc, below the polymer glass transition. Our QENS results are in agreement with the literature data for the methyl group rotation but we also find evidence for a fast process, with activation energy of 1.9 kJ/mol. Although the different instruments provide only limited dynamic information, we attempt to give a homogeneous description of molecular motion across the different energies and Q ranges. © 2006 Elsevier B.V. All rights reserved.

Original language	English
Pages (from-to)	53-63
Number of pages	11
Journal	Chemical Physics
Volume	328
Issue number	1-3
DOIs	https://doi.org/10.1016/j.chemphys.2006.06.026
Publication status	Published - 29 Sept 2006

Keywords

Fast process
Methyl group
Poly(vinyl acetate)
Quasielastic neutron scattering

Access to Document

10.1016/j.chemphys.2006.06.026

Cite this

@article{0e4d53e37f7546e5974d4b0d6ef756ad,

title = "Quasielastic neutron scattering measurements of fast process and methyl group dynamics in glassy poly(vinyl acetate)",

abstract = "The dynamics of poly(vinyl acetate) (PVAc) in the glassy state has been investigated using a range of neutron spectrometers, sampling complementary energy and momentum transfer ranges. By combining the analysis of elastic window scan data at high resolution, medium resolution quasielastic neutron scattering (QENS) spectra and low resolution time-of-flight measurements we identify the molecular processes occurring in PVAc, below the polymer glass transition. Our QENS results are in agreement with the literature data for the methyl group rotation but we also find evidence for a fast process, with activation energy of 1.9 kJ/mol. Although the different instruments provide only limited dynamic information, we attempt to give a homogeneous description of molecular motion across the different energies and Q ranges. {\textcopyright} 2006 Elsevier B.V. All rights reserved.",

keywords = "Fast process, Methyl group, Poly(vinyl acetate), Quasielastic neutron scattering",

author = "Chuhong Zhang and Valeria Arrighi and Simona Gagliardi and McEwen, {Iain J.} and Jeerachada Tanchawanich and Telling, {M. T F} and Zanotti, {J. M.}",

year = "2006",

month = sep,

day = "29",

doi = "10.1016/j.chemphys.2006.06.026",

language = "English",

volume = "328",

pages = "53--63",

journal = "Chemical Physics",

issn = "0301-0104",

publisher = "Elsevier",

number = "1-3",

}

TY - JOUR

T1 - Quasielastic neutron scattering measurements of fast process and methyl group dynamics in glassy poly(vinyl acetate)

AU - Zhang, Chuhong

AU - Arrighi, Valeria

AU - Gagliardi, Simona

AU - McEwen, Iain J.

AU - Tanchawanich, Jeerachada

AU - Telling, M. T F

AU - Zanotti, J. M.

PY - 2006/9/29

Y1 - 2006/9/29

N2 - The dynamics of poly(vinyl acetate) (PVAc) in the glassy state has been investigated using a range of neutron spectrometers, sampling complementary energy and momentum transfer ranges. By combining the analysis of elastic window scan data at high resolution, medium resolution quasielastic neutron scattering (QENS) spectra and low resolution time-of-flight measurements we identify the molecular processes occurring in PVAc, below the polymer glass transition. Our QENS results are in agreement with the literature data for the methyl group rotation but we also find evidence for a fast process, with activation energy of 1.9 kJ/mol. Although the different instruments provide only limited dynamic information, we attempt to give a homogeneous description of molecular motion across the different energies and Q ranges. © 2006 Elsevier B.V. All rights reserved.

AB - The dynamics of poly(vinyl acetate) (PVAc) in the glassy state has been investigated using a range of neutron spectrometers, sampling complementary energy and momentum transfer ranges. By combining the analysis of elastic window scan data at high resolution, medium resolution quasielastic neutron scattering (QENS) spectra and low resolution time-of-flight measurements we identify the molecular processes occurring in PVAc, below the polymer glass transition. Our QENS results are in agreement with the literature data for the methyl group rotation but we also find evidence for a fast process, with activation energy of 1.9 kJ/mol. Although the different instruments provide only limited dynamic information, we attempt to give a homogeneous description of molecular motion across the different energies and Q ranges. © 2006 Elsevier B.V. All rights reserved.

KW - Fast process

KW - Methyl group

KW - Poly(vinyl acetate)

KW - Quasielastic neutron scattering

UR - http://www.scopus.com/inward/record.url?scp=33748938158&partnerID=8YFLogxK

U2 - 10.1016/j.chemphys.2006.06.026

DO - 10.1016/j.chemphys.2006.06.026

M3 - Article

SN - 0301-0104

VL - 328

SP - 53

EP - 63

JO - Chemical Physics

JF - Chemical Physics

IS - 1-3

ER -

Quasielastic neutron scattering measurements of fast process and methyl group dynamics in glassy poly(vinyl acetate)

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this