✦ LIBER ✦

Challenges in Glassy Dynamics of Polymers

✍ Scribed by Anatoli Serghei

Publisher: John Wiley and Sons
Year: 2008
Tongue: English
Weight: 677 KB
Volume: 209
Category: Article
ISSN: 1022-1352
DOI: 10.1002/macp.200800197

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

This work is focused on the glassy dynamics of polymers under conditions of one‐dimensional confinement (in thin films). Several important topics are addressed: (a) preparative factors with large impact on the molecular dynamics of thin polymer films (oxidative degradation, plasticizing effects, residual stresses leading to metastable states); (b) it is emphasized the necessity to characterize the glass transition by measuring relaxation time distribution functions; (c) it is shown that different experimental techniques do not necessarily deliver converging results when applied to characterise the dynamics of confined polymers; (d) a novel approach is demonstrated which grants a direct experimental access to interfacial polymer dynamics; (e) measurements on nearly isolated polymer chains are presented.

magnified image

📜 SIMILAR VOLUMES

Deformation in glassy polymers

✍ M. Song; D. J. Hourston; H. M. Pollock 📂 Article 📅 1996 🏛 John Wiley and Sons 🌐 English ⚖ 414 KB 👁 1 views

On the basis of known nonlinearity of intermolecular force fields, we discuss the interpretation of PVT (pressure, volume, and temperature) behavior, pressure-temperature superposition for polymers, and the relationship between yield stress and tensile modulus. For PVT behavior of polymers, our theo

Differential sorption in glassy polymers

✍ J. S. Vrentas; C. M. Vrentas 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 160 KB 👁 1 views

Anomalous sorption curves have often been observed for differential sorption experiments in glassy polymers. A model is proposed to describe this non-Fickian behavior. This model is based on the presence of interfacial resistance caused by slow rate processes at the phase boundary. Predictions of th

Yielding processes in glassy polymers

✍ P. Zitek; J. Zelinger 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 392 KB 👁 1 views

Gas transport in glassy polymers

✍ W. R. Vieth; J. A. Eilenberg 📂 Article 📅 1972 🏛 John Wiley and Sons 🌐 English ⚖ 321 KB 👁 1 views

Structural changes in glassy polymers

✍ M. S. Ali; R. P. Sheldon 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 525 KB

Diffusion of small molecules in glassy p

Diffusion of small molecules in glassy polymers

✍ M. Pönitsch; P. Gotthardt; A. Grüger; H. G. Brion; R. Kirchheim 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 255 KB 👁 2 views

Small molecules in glassy polymers are considered to occupy sites with a distribution of free energies of dissolution. Then their diffusivity depends on concentration and temperature in the same way as it has been derived for hydrogen atoms in metallic glasses. For hydrogen it was shown that the tra