1990
DOI: 10.1103/physrevlett.65.657
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Intermolecular and intramolecular solubilization: Collapse and expansion of a polymer chain in surfactant solutions

Abstract: Solubilization and conformational transitions of a polymer in dilute surfactant solutions are studied by dynamic light scattering. The polymer, poly(TV-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… Show more

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Cited by 104 publications
(108 citation statements)
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“…In accordance with the Flory theory, the solubility of PS in cyclohexane decreases and its UCST shifts towards lower polymer concentrations on increasing the polymer molar mass. Non-ionic polymers can also undergo a coil-globule transition in aqueous solutions [82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99]. However, their transition significantly differs from the transition of polymers in organic media.…”
Section: Sensitivity and Responsivenessmentioning
confidence: 99%
“…In accordance with the Flory theory, the solubility of PS in cyclohexane decreases and its UCST shifts towards lower polymer concentrations on increasing the polymer molar mass. Non-ionic polymers can also undergo a coil-globule transition in aqueous solutions [82][83][84][85][86][87][88][89][90][91][92][93][94][95][96][97][98][99]. However, their transition significantly differs from the transition of polymers in organic media.…”
Section: Sensitivity and Responsivenessmentioning
confidence: 99%
“…14 In the case of copolymers bearing chiral units, the increase in the CD signal is a consequence of stronger correlations between MALEU units occurring more easily in the compact coil compared to the loose coil. This is a further manifestation of MALEU units being correlated, as observed above in comparing the CD spectra of pMALEU and p(NIPAAmco-MALEU).…”
Section: Resultsmentioning
confidence: 99%
“…The LCST value obtained from light scattering and turbidimetric experiments are higher than those from DSC, although the results depend on the heating rate and the concentration of the aqueous solution 17) . For semi dilute solutions the heat of demixing as well as the LCST are independent of the concentration and the molecular mass of the polymer 4,18,19) . Turbidimetry is an easy and widely used method for the determination of the LCST.…”
Section: Phase Transition Temperaturesmentioning
confidence: 98%