Ahn, Sungsook Ahn, Sung Won Song, Soo-Chang 2024-01-20T22:32:58Z 2024-01-20T22:32:58Z 2021-09-03 2008-10-01 0887-6266 https://pubs.kist.re.kr/handle/201004/133063 The relative effectiveness of anions and cations in altering macromolecular conformation was reported to be independent of the nature of the macromolecule. However, in terms of the degree of changes, macromolecule-dependent ion action cannot be underestimated. The designed poly(organophosphazenes) have been selected for this study due to its versatility of the substitution with a fixed backbone. To set up the systematic explanation on the ion action related with molecular interactions, ions and polymers are arranged based on the water binding ability. As a characteristic factor specific in the thermothickening system, the temperature at which the viscosity of the polymer solution reaches the maximum (T-max) has been compared. Anions with strong water binding ability more effectively lower the T-max of the hydrophobic poly(organophosphazenes). Meanwhile, the Tmax of the cation-complexed poly(organophosphazenes) are lowered by the sequence of water binding ability of the complexed cations. In both the anion and cation interactions, poly(organophosphazenes) substituted by longer PEG and more hydrophilic amino acid ester, show differentiated result due to different interaction with water when compared with other polymer systems in this study. Ion interaction with poly(organophosphazenes) mediated by water supports interfacial interactions expressed by interaction parameters, which strongly depends on the polymer structure and ion type. (C) 2008 Wiley Periodicals, Inc. English JOHN WILEY & SONS INC N-ISOPROPYLACRYLAMIDE GELS AQUEOUS-SOLUTIONS WATER-STRUCTURE LIQUID WATER SIDE-GROUPS SALTS MACROMOLECULES THERMODYNAMICS SOLVATION ELECTROLYTES Polymer structure-dependent ion interaction studied by amphiphilic nonionic poly(organophosphazenes) Article 10.1002/polb.21537 1 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.46, no.19, pp.2022 - 2034 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 46 19 2022 2034 scie scopus 000259589100003 2-s2.0-53349151595 Polymer Science Polymer Science Article N-ISOPROPYLACRYLAMIDE GELS AQUEOUS-SOLUTIONS WATER-STRUCTURE LIQUID WATER SIDE-GROUPS SALTS MACROMOLECULES THERMODYNAMICS SOLVATION ELECTROLYTES interfacial interaction ion phase transition polyphosphazene thermothickening