Copolymerization kinetics of <i>N</i>‐isopropylacrylamide and diethylene glycol monomethylether monomethacrylate determined by online NMR spectroscopy

Abstract

Abstract The kinetics of the copolymerization of N ‐isopropylacrylamide (NiPAAm) and diethylene glycol monomethylether monomethacrylate was followed by online 1 H NMR spectroscopy. Two copolymerization reactions were sufficient to evaluate the kinetic data with the Extended‐Kelen–Tüdös method as well as the nonlinear least square method. The copolymerization parameter was determined as r NiPAAm = 0.70 and r DEGMA = 2.0. The higher reactivity of the methacrylate compared to the NiPAAm is in good agreement with other kinetic data of similar systems. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 43: 142–148, 2005