Volume fraction determination of microgel composed of interpenetrating polymer networks of PNIPAM and Polyacrylic acid
Interpenetrated polymer network microgels, composed of crosslinked networks of poly(N-isopropylacrylamide) and Polyacrylic acid (PAAc), have been investigated through rheological measurements at four different amounts of Polyacrylic acid. Both PAAc content and crosslinking degree modify particle dimensions, mass and softness, thereby strongly affecting the volume fraction and the system viscosity.