EXAFS studies on Zn(II) complexes with 1,3-bis(aminomethyl)cyclohexane of ethylene-methacrylic acid copolymer

Extended X-ray absorption fine structure (EXAFS) experiments were performed at 25 and 105°C for Zn(II) salts of ethylene-methacrylic acid (5.4 mol%) copolymer and their complexes with 1,3-bis(amino-methyl)cyclohexane (BAC) (EMAA-Zn-BAC). The zinc carboxylate in EMAA-Zn-BAC systems was in a four-fold...

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Bibliographic Details
Published in:Polymer (Guilford) 1992, Vol.33 (9), p.1809-1812
Main Authors: Tsunashima, Kenji, Nishioji, Hiroshi, Hirasawa, Eisaku, Yano, Shinichi
Format: Article
Language:English
Subjects:
Applied sciences
ethylene ionomer
Exact sciences and technology
EXAFS
Organic polymers
Physicochemistry of polymers
Properties and characterization
Structure, morphology and analysis
temperature dependence
Zn(II) complexes with BAC
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Summary:Extended X-ray absorption fine structure (EXAFS) experiments were performed at 25 and 105°C for Zn(II) salts of ethylene-methacrylic acid (5.4 mol%) copolymer and their complexes with 1,3-bis(amino-methyl)cyclohexane (BAC) (EMAA-Zn-BAC). The zinc carboxylate in EMAA-Zn-BAC systems was in a four-fold coordination at room temperature. The ZnO distance increased with increasing BAC content, and became smaller at 105°C than at room temperature for EMAA-0.60Zn and EMAA-0.60Zn-0.40BAC but scarcely changed with temperature for EMAA-0.60Zn-0.97BAC. The fluctuation factor (σ) was larger at 105°C than at room temperature for all the samples, due to thermal vibration. In this paper, it is pointed out that these EXAFS results support the presence of an order-disorder transition in ionic clusters.
ISSN:0032-3861
1873-2291
DOI:10.1016/0032-3861(92)90475-C