QENS from polymer aggregates in supercritical CO2

R. Triolo; V. Arrighi; A. Triolo; P. Migliardo; S. Magazù; J. B. McClain; D. Betts; J. M. Desimone; H. D. Middendorf

doi:10.1016/S0921-4526(99)01500-8

QENS from polymer aggregates in supercritical CO₂

R. Triolo, V. Arrighi, A. Triolo, P. Migliardo, S. Magazù, J. B. McClain, D. Betts, J. M. Desimone, H. D. Middendorf

School of Engineering & Physical Sciences

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

9 Citations (Scopus)

Abstract

We report QENS measurements from PS-b-PFOA aggregates in supercritical CO₂. Line shapes are dominated by localized diffusive modes and segmental dynamics of the anchored, finite-length PFOA chains. For Q=0.6 angstrom^-1, we obtain effective diffusion coefficients of ?0.8 10^-6 cm²/s. At higher Q, a single component is not sufficient as shown by excess intensity on the flanks. For Q=1.5 angstroms^-1, the wings reflect contributions due to a distribution of faster, more localized chain modes.

Original language	English
Pages (from-to)	386-387
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	276-278
DOIs	https://doi.org/10.1016/S0921-4526(99)01500-8
Publication status	Published - Mar 2000
Event	2nd European Conference on Neutron Scattering - Budapest, Hung Duration: 1 Sept 1999 → 4 Sept 1999

Access to Document

10.1016/S0921-4526(99)01500-8

Cite this

@article{80dacb1f0a1d4011bffee1476d2c326d,

title = "QENS from polymer aggregates in supercritical CO2",

abstract = "We report QENS measurements from PS-b-PFOA aggregates in supercritical CO2. Line shapes are dominated by localized diffusive modes and segmental dynamics of the anchored, finite-length PFOA chains. For Q=0.6 angstrom-1, we obtain effective diffusion coefficients of ?0.8 10-6 cm2/s. At higher Q, a single component is not sufficient as shown by excess intensity on the flanks. For Q=1.5 angstroms-1, the wings reflect contributions due to a distribution of faster, more localized chain modes.",

author = "R. Triolo and V. Arrighi and A. Triolo and P. Migliardo and S. Magaz{\`u} and McClain, {J. B.} and D. Betts and Desimone, {J. M.} and Middendorf, {H. D.}",

year = "2000",

month = mar,

doi = "10.1016/S0921-4526(99)01500-8",

language = "English",

volume = "276-278",

pages = "386--387",

journal = "Physica B: Condensed Matter",

publisher = "Elsevier B.V.",

note = "2nd European Conference on Neutron Scattering, ECNS '99 ; Conference date: 01-09-1999 Through 04-09-1999",

}

TY - JOUR

T1 - QENS from polymer aggregates in supercritical CO2

AU - Triolo, R.

AU - Arrighi, V.

AU - Triolo, A.

AU - Migliardo, P.

AU - Magazù, S.

AU - McClain, J. B.

AU - Betts, D.

AU - Desimone, J. M.

AU - Middendorf, H. D.

PY - 2000/3

Y1 - 2000/3

N2 - We report QENS measurements from PS-b-PFOA aggregates in supercritical CO2. Line shapes are dominated by localized diffusive modes and segmental dynamics of the anchored, finite-length PFOA chains. For Q=0.6 angstrom-1, we obtain effective diffusion coefficients of ?0.8 10-6 cm2/s. At higher Q, a single component is not sufficient as shown by excess intensity on the flanks. For Q=1.5 angstroms-1, the wings reflect contributions due to a distribution of faster, more localized chain modes.

AB - We report QENS measurements from PS-b-PFOA aggregates in supercritical CO2. Line shapes are dominated by localized diffusive modes and segmental dynamics of the anchored, finite-length PFOA chains. For Q=0.6 angstrom-1, we obtain effective diffusion coefficients of ?0.8 10-6 cm2/s. At higher Q, a single component is not sufficient as shown by excess intensity on the flanks. For Q=1.5 angstroms-1, the wings reflect contributions due to a distribution of faster, more localized chain modes.

UR - http://www.scopus.com/inward/record.url?scp=0033902202&partnerID=8YFLogxK

U2 - 10.1016/S0921-4526(99)01500-8

DO - 10.1016/S0921-4526(99)01500-8

M3 - Article

VL - 276-278

SP - 386

EP - 387

JO - Physica B: Condensed Matter

JF - Physica B: Condensed Matter

T2 - 2nd European Conference on Neutron Scattering

Y2 - 1 September 1999 through 4 September 1999

ER -

QENS from polymer aggregates in supercritical CO₂

Abstract

Access to Document

Other files and links

Fingerprint

Cite this