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 Edward Long


研究成果: Article査読

35 被引用数 (Scopus)


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.

ジャーナルPhysical Review E - Statistical, Nonlinear, and Soft Matter Physics
出版ステータスPublished - 2005 9月 1

ASJC Scopus subject areas

  • 統計物理学および非線形物理学
  • 統計学および確率
  • 凝縮系物理学


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