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Alginate polyelectrolyte lonotropic gels. XIII geometrical aspects for chelation in metal alginate complexes related to their physico‐chemical properties
Author(s) -
Hassan Refat M.
Publication year - 1993
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990310112
Subject(s) - chelation , polyelectrolyte , metal , materials science , divalent , metal ions in aqueous solution , amorphous solid , inorganic chemistry , chemical engineering , chemistry , polymer , crystallography , composite material , metallurgy , engineering
Electrical conductance measurements showed that monovalent, trivalent and tetravalent metal alginate complexes possess electrical conductivities in the order of semiconductors, whereas divalent and hexavalent metal alginate electrical conductivities lic in the range of insulators. X‐Ray diffraction indicated that these metal alginate complexes are amorphous in nature. Two geometrical structures for chelation between the functional groups and the interdiffused metal ions have been suggested: a non‐planar geometrical structure for the mono‐, tri‐ and tetravalent metal alginates, and a planar geometry for the divalent and hexavalent metal alginates.