Rheology, Morphology and Phase Behavior in Amphiphilic Block Copolymer/microemulsion Systems Conference Paper uri icon

abstract

  • Joining together by means of covalent bonds hydrophobic and hydrophilic entities on the same molecule gives rise to materials with interesting properties in aqueous systems or in the presence of mixed solvents such as water/oil microemulsions. In this paper we describe the rheological properties of a synthetic amphiphilic block copolymer dissolved in a water-in- oil microemulsion. The block copolymer is an ABA type copolymer composed of poly (oxyethylene)(PEO) as the hydrophilic A block and poly (dimethyl siloxane)(PDMS) as the hydrophobic center B block. Different polymers have been prepared with a B block of D_p= 160 and three different sizes of the A blocks with D_p= 10, 45, and 120 respectively. The resulting copolymer is insoluble in water and hardly soluble in decane (good solvent for the PDMS). In the presence of water in oil microemulsion stabilized by the small molecular …

publication date

  • January 1, 2000