Synthesis of thermosensitive hydrogels of poly(N-isopropylacrylamide)-co- poly(N,N-dimethylacrylamide) [Síntesis de hidrogeles termosensibles de poli(n-isopropilacrilamida) -co-poli(N,N,-dimetilacrilamida)]

Abstract

In this paper we copolymerized N-isopropylacrylamide (NIPA) with N, N, dimethylacrylamide (DIMA). The increase in the proportion of DIMA added resulted in a proportional increase over the transition temperature, as well as on the ability of samples to absorb water. An increase in the DIMA concentration also reduced the volumetric fraction and the rate of water released, in the transition point. After reaching swelling equilibrium at 25 °C the samples were heated to 38 °C for determining the diffusion coefficient.