Collective motion in Poly(ethylene oxide)/poly(methylmethacrylate) blends

Bela Farago; Chunxia Chen; Janna K. Maranas; Sudesh Kamath; Ralph H. Colby; Anthony J. Pasquale; Timothy E. Long

doi:10.1103/PhysRevE.72.031809

Collective motion in Poly(ethylene oxide)/poly(methylmethacrylate) blends

Bela Farago, Chunxia Chen, Janna K. Maranas, Sudesh Kamath, Ralph H. Colby, Anthony J. Pasquale, Timothy E. Long

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

33 Citations (SciVal)

Abstract

We present neutron spin echo and structural measurements on a perdeutereted miscible polymer blend: poly(ethylene oxide)[PEO]/poly(methyl methacrylate)[PMMA], characterized by a large difference in component glass transition temperatures and minimal interactions. The measurements cover the q range 0.35 to 1.66-1 and the temperature range Tg-75 to Tg+89K, where Tg is the blend glass transition. The spectra, obtained directly in the time domain, are very broad with stretching parameters β∼0.30. The relaxation times vary considerably over the spatial range considered however at none of the q values do we see two distinct relaxation times. At small spatial scales relaxations are still detectable at temperatures far below Tg. The temperature dependence of these relaxation times strongly resembles the β-relaxation process observed in pure PMMA.

Original language	English (US)
Article number	031809
Journal	Physical Review E - Statistical, Nonlinear, and Soft Matter Physics
Volume	72
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevE.72.031809
State	Published - Sep 1 2005

All Science Journal Classification (ASJC) codes

Statistical and Nonlinear Physics
Statistics and Probability
Condensed Matter Physics

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title = "Collective motion in Poly(ethylene oxide)/poly(methylmethacrylate) blends",

abstract = "We present neutron spin echo and structural measurements on a perdeutereted miscible polymer blend: poly(ethylene oxide)[PEO]/poly(methyl methacrylate)[PMMA], characterized by a large difference in component glass transition temperatures and minimal interactions. The measurements cover the q range 0.35 to 1.66-1 and the temperature range Tg-75 to Tg+89K, where Tg is the blend glass transition. The spectra, obtained directly in the time domain, are very broad with stretching parameters β∼0.30. The relaxation times vary considerably over the spatial range considered however at none of the q values do we see two distinct relaxation times. At small spatial scales relaxations are still detectable at temperatures far below Tg. The temperature dependence of these relaxation times strongly resembles the β-relaxation process observed in pure PMMA.",

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AU - Farago, Bela

AU - Chen, Chunxia

AU - Maranas, Janna K.

AU - Kamath, Sudesh

AU - Colby, Ralph H.

AU - Pasquale, Anthony J.

AU - Long, Timothy E.

PY - 2005/9/1

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AB - We present neutron spin echo and structural measurements on a perdeutereted miscible polymer blend: poly(ethylene oxide)[PEO]/poly(methyl methacrylate)[PMMA], characterized by a large difference in component glass transition temperatures and minimal interactions. The measurements cover the q range 0.35 to 1.66-1 and the temperature range Tg-75 to Tg+89K, where Tg is the blend glass transition. The spectra, obtained directly in the time domain, are very broad with stretching parameters β∼0.30. The relaxation times vary considerably over the spatial range considered however at none of the q values do we see two distinct relaxation times. At small spatial scales relaxations are still detectable at temperatures far below Tg. The temperature dependence of these relaxation times strongly resembles the β-relaxation process observed in pure PMMA.

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Collective motion in Poly(ethylene oxide)/poly(methylmethacrylate) blends

Abstract

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