The new polymer comprises two different polymers joined in the centre by a chemical linker. Poly(N-isopropyl acrylamide) forms the temperature sensitive, hydrophilic end, while 2-hydroxyethyl methacrylate makes up the hydrophobic, pH-sensitive end. Under gentle heating or mildly acidic conditions, the polymers will switch from being hydrophobic to hydrophilic (or vice versa) - causing the micelles to disassemble.