The Hydrodynamic Properties of Micelles Formed by Block Copolymers of Isoprene and tert-Butylacrylate in n-Octane

Authors : Halil İbrahim ÜNAL, Colin PRICE

Pages : 487-496

View : 12 | Download : 6

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :The hydrodynamic properties of micelles formed by 2 block copolymers of isoprene and tert-butylacrylate in n-octane were investigated by dynamic light scattering insert ignore into journalissuearticles values(DLS); over a range of temperatures and concentrations using both the cumulants and histogram methods. By means of the histogram method it was possible to determine the average hydrodynamic diameters of both micelles and unassociated-chains in the same solution. It was also used to determine the z-average fraction of unassociated-chains at a particular concentration and temperature, and it provided an alternative route when combined with static light scattering insert ignore into journalissuearticles values(SLS); for determining the thermodynamics of micellisation. The overall-average diffusion coefficient, \overline{D}z, values and the average hydrodynamic diameters, insert ignore into journalissuearticles values(\overline{dh-1});z-1, of the 2 block copolymers were determined by means of the cumulants method.
Keywords : Block copolymers, hydrodynamic properties, micellisation