| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9559777 | Polymer | 2005 | 6 Pages |
Abstract
The roles of ionic bonding in molten ethylene ionomers without ionic aggregates were rheologically characterized in linear regions under shear. We have measured melt viscosities of ethylene-methacrylic acid (EMAA) ionomers by means of dynamic shear experiment. The samples used in this study were binary mixtures selected from Na, Mg and Zn salts of EMAA (MAA=5.4 mol%). The dynamic shear properties revealed that the time-material superposition is applicable to these ionomer blends in a temperature range from 140 to 200 °C. It was also found that these binary mixtures unexpectedly give decreases of zero shear viscosities obtained from a time-material superposition, if the cations were selected from different metal groups such as alkali, alkaline earth and transition metals. This behavior can be explained by the acid-cation exchange mechanism.
Related Topics
Physical Sciences and Engineering
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Authors
Mihoko Nishio, Akihiro Nishioka, Takashi Taniguchi, Kiyohito Koyama,