INTERMOLECULAR AND INTRAMOLECULAR SOLUBILIZATION - COLLAPSE AND EXPANSION OF A POLYMER-CHAIN IN SURFACTANT SOLUTIONS
INTERMOLECULAR AND INTRAMOLECULAR SOLUBILIZATION - COLLAPSE AND EXPANSION OF A POLYMER-CHAIN IN SURFACTANT SOLUTIONS
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DOI：
10.1103/physrevlett.65.657
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发表时间：
1990-07-30
影响因子：
8.6
通讯作者：
BINKERT, T
中科院分区：
文献类型：
--
作者：
RICKA, J;MEEWES, M;BINKERT, T
用动态光散射研究了聚合物在表面活性剂稀溶液中的增溶和构象转变。当加热到34 ℃以上时，聚合物聚（N-异丙基丙烯酰胺）在水溶液中聚集。少量的表面活性剂，十二烷基硫酸钠，防止发生聚集-分子间增溶。然后聚合物形成孤立的塌陷小球的稳定分散体。表面活性剂浓度的进一步增加导致由于分子内增溶而从小球膨胀到线圈状态。
Solubilization and conformational transitions of a polymer in dilute surfactant solutions are studied by dynamic light scattering. The polymer, poly (N-isopropylacrylamide), aggregates in aqueous solution when heated above 34 C. A small amount of surfactant, sodium dodecyl sulfate, prevents aggregation—intermolecular solubilization takes place. The polymer then forms a stable dispersion of isolated collapsed globules. A further increase of the surfactant concentration leads to an expansion from the globule to the coil state due to intramolecular solubilization.