Associative polymers have a very important role as rheological modifiers, due to their ability to form interconnected networks of hydrophobic domains. Additionally, thermo-sensitive associative polymers have interesting potential applications in controlling colloidal materials such as in formulations science. The aim of this proposal is to study simultaneously the structural and dynamic properties of novel thermo-sensitive end-capped-block-star polymers as a function of the temperature. This is important as these compounds combine the properties of associative polymers with a pronounced temperature dependence thereby rendering them very interesting polymeric materials.