Light scattering of spinnable, viscoelastic solutions of hexadecyltrimethylammonium salicylate

Static, dynamic, and electrophoretic light scattering were measured for spinnable, viscoelastic solutions of hexadecyltrimethylammonium salicylate with and without sodium salicylate (NaSal) at various temperatures. While short rodlike micelles are formed in aqueous solutions without NaSal, the length of rodlike micelles increases with an increase in NaSal concentration and reaches 200-3000 nm in 0.1 M NaSal. However, the size diminishes above 0.5 M NaSal, and small micelles exist in 1 M NaSal. The external interference effect indicating a strong intermicelIar correlation is quite apparent in aqueous solutions without NaSal, but it decreases with addition of NaSal and is imperceptible above 0.001 M NaSal