Dynamic mechanical relaxations of ethylene ionomers

Dynamic mechanical properties were measured for metal salts (Li, Mg, Na, and Zn) of poly-(ethylene-co-methacrylic acid) (EMAA) using a dynamic viscoelastometer. The study reproduced the previous observation that the mechanical relaxation behavior clearly responded to ionic cluster formation and its...

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Bibliographic Details
Published in:Macromolecules 1993-07, Vol.26 (4), p.752-757
Main Authors: Tachino, Hitoshi, Hara, Hisaaki, Hirasawa, Eisaku, Kutsumizu, Shoichi, Tadano, Kenji, Yano, Shinichi
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Rheology and viscoelasticity
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Summary:Dynamic mechanical properties were measured for metal salts (Li, Mg, Na, and Zn) of poly-(ethylene-co-methacrylic acid) (EMAA) using a dynamic viscoelastometer. The study reproduced the previous observation that the mechanical relaxation behavior clearly responded to ionic cluster formation and its phase separation from the hydrocarbon matrix - the Li, Mg, and Na ionomers formed ionic clusters and the Zn ionomer did not form ionic clusters at neutralization up to 60%. However, this work has revealed clear evidence that even the Zn ionomer forms regions of microphase-separated ionic clusters at a neutralization of 80 degree C or higher.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma00056a029