Poly(methacrylic acid)–copper ion interactions: Phase diagrams: light and X-ray scattering
The interaction of a sample of poly(methacrylic acid) with copper ions is investigated using various techniques: light and X-ray scattering, viscosimetry and fluorescence. The measurements were performed in the solubility domains and the regions where phase separation occurs were determined as a fun...
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Published in | Polymer (Guilford) Vol. 40; no. 12; pp. 3331 - 3344 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Oxford
Elsevier Ltd
1999
Elsevier |
Subjects | |
Online Access | Get full text |
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Summary: | The interaction of a sample of poly(methacrylic acid) with copper ions is investigated using various techniques: light and X-ray scattering, viscosimetry and fluorescence. The measurements were performed in the solubility domains and the regions where phase separation occurs were determined as a function of pH and copper/polymer ratio. We conclude that copper is mainly bound on the polymer through the formation of binuclear complexes implying pairs of adjacent carboxylates far along the chain. This induces a strong collapse of the chain at low ionisation degree and partially hinders the chain expansion at high pH. Fluorescence measurements can be interpreted through the existence of two different transitions: local and global transitions. |
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ISSN: | 0032-3861 1873-2291 |
DOI: | 10.1016/S0032-3861(98)00126-8 |