𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Sorption and diffusion of low molecular weight gases and vapors in glassy polymers at high concentration of sorbate

✍ Scribed by M. A. Krykin; O. M. Zinovieva; A. B. Zinoviev

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
167 KB
Volume
37
Category
Article
ISSN
0887-6266

No coin nor oath required. For personal study only.

✦ Synopsis

A theoretical approach has been developed to describe the sorption and diffusion processes of low weight molecular gases and vapors in polymers at wide ranges of sorbate concentration. The equation of an S-shaped gas sorption isotherm in glassy polymer matrix has been derived. The concentration dependence of the sorbate molecule diffusion coefficient has been established. For an S-shaped sorption isotherm, this dependence is nonmonotonous. The conditions of cluster formation of sorbate molecules have been analyzed within the proposed approach, in which it is possible to determine a correlation between these conditions and parameters of sorption isotherm. The comparison of the experimental and theoretical data provides an assessment of the microscopic characteristics of investigated polymer-vapor systems, such as the distances between vapor molecules in a matrix corresponding to intermolecular repulsion and attraction.

📜 SIMILAR VOLUMES

An examination of the shear-thickening b
An examination of the shear-thickening behavior of high molecular weight polymers dissolved in low-viscosity Newtonian solvents
✍ B. J. Edwards; D. J. Keffer; C. W. Reneau 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 322 KB 👁 1 views

## Abstract The anomaly of shear thickening at high shear rates can be observed under certain conditions for high molecular weight polymers dissolved in low‐viscosity Newtonian solvents despite the fact that shear‐thinning behavior is considered the norm for these fluids. The nature of the shear‐th