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The rheological behavior of a cationic surfactant trimer, recently suggested to form branched threadlike micelles, is reported. Comparison with the homologous dimer, which forms strictly linear micelles, shows that the main consequence of branching is a distinctive concentration dependence of the elastic modulus. When the system is not fully entangled, a decrease of the elastic modulus suggests a contraction of the radius of gyration due to branching. In the fully entangled regime, the elasticity enhancement provides a measure of the junction density.
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In et al. (1999) studied this question.
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