๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Thermal Effects on the Gas Transmission Properties of Ionomers Used in Food Packaging Applications

โœ Scribed by G. Mensitieri; M. A. Del Nobile; C. Manfredi

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
605 KB
Volume
9
Category
Article
ISSN
0894-3214

No coin nor oath required. For personal study only.

โœฆ Synopsis

Polyethylene-based ionomers, due to t h e presence of ionic aggregates, display a time-dependent crystalline morphology if submitted t o thermal treatments. As a consequence gas permeability, which is strongly affected by physical morphology, is also found t o be time dependent in previously thermally treated ionomer samples. The effect of sample exposure a t 65ยฐC and o f successive ageing a t 35ยฐC on gas transmission properties of three different ethyleneacrylic acid ionomers (characterized by a different amount of acrylic acid groups, percentage of neutralization and type of counterions) has been investigated. In particular the changes in oxygen and carbon dioxide permeabilities due to thermal treatments a t 65ยฐC and subsequent ageing a t 35ยฐC have been monitored. X-Ray diffraction analysis and differential scanning calorimetry have been used t o elucidate these changes in transport properties.

๐Ÿ“œ SIMILAR VOLUMES

Effect of polymer loading on the electri
Effect of polymer loading on the electrical and thermodynamic properties in relation to gas chromatographic applications
โœ A. Y. El-Naggar; G. M. Turky ๐Ÿ“‚ Article ๐Ÿ“… 2001 ๐Ÿ› John Wiley and Sons ๐ŸŒ English โš– 185 KB ๐Ÿ‘ 3 views

## Abstract Different layers, 5, 10, 15, and 25% (w/W), of the three studied polyethylene glycols (PEGs) having different molecular weights, 600, 4000, and 20,000, were used for coating on chromosorb pink acid washed (P AW). The polarity and selectivity of the prepared packing columns and their the