Cover Image, Volume 51, Issue 16



The pH and temperature responsive behavior of random copolymers of dimethylaminoethyl acrylate (DMAEA) and methyl acrylate (MA) and their methacrylate counterparts (DMAEMA and MMA) is studied in aqueous solution by Pepa Cotanda, Daniel B. Wright, Martin Tyler, and Rachel K. O'Reilly on page 3333. The higher incorporation of the hydrophobic monomer in the copolymer results in an increase in the pKa values due to the larger distance between charges, thus facilitating the protonation of adjacent nitrogens for both the acrylate and methacrylate derivatives. The cloud point values are irreproducible for the acrylate polymers due to the self-hydrolysis of DMAEA and kinetic studies are performed in order to explore the full potential of these versatile polymers.