The aqueous solutions of two triblock copolymers of poly(oxybutylene/oxyethylene /oxybutylene) were studied by surface tensiometry, viscometry and dynamic laser light scattering techniques at various temperatures (293, 303, 313 and 323K).Effect of block architecture and temperature on surface and miceller properties was also studied. Critical micelle concentration (CMC) and thermodynamics of micellization were determined by surface tensiometry. Surface activity of these triblock copolymers was studied by measuring surface parameter i.e surface pressure ( ), surface excess concentration ( ),...