Transient networks by ABA triblock copolymers and microemulsions : a rheological study

摘要: The rheological properties of microemulsion-triblock copolymer [poly(oxyethylene)-b-polyisoprene-b-poly(oxyethylene)] transient networks were studied by oscillatory shear measurements. chemical nature the surfactants (ionic or nonionic) seems not to affect principal viscoelastic feature our systems. main differences between both systems are caused individual phase behavior underlying microemulsions : within a particular temperature region dependences mechanical opposite for ionic and nonionic Also, specific interactions hydrophilic poly(oxyethylene) blocks network links lead significant effect on formation structures lifetimes cross-links. These connected with characteristic relaxation times derived from spectra. Model considerations yielded definition persistence length triblock molecules dissolved in microemulsions.