The copolymer hydrogel of N-isopropylacrylamide (NIPAAm) and N,N-dimethylaminopropylacrylamide (DMAPAA) was synthesized by free radical copolymerization.The phase transition behavior of p(NIPAAmco-DMAPAA) hydrogels as a function of temperature and Inductively Coupled Plasma Optical-Emission Spectroscopy Determination of Major and Minor Elements in Vinegar SDS concentration was studied.The p(NIPAAmco-DMAPAA) hydrogels exhibited larger swelling capacity than the homo p(NIPAAm) hydrogel.The phase transition temperature of p(NIPAAm-co-DMAPAA) hydrogels increased with an increase of DMAPAA content.
In aqueous SDS solution, the swelling capacity of p(NIPAAm-co-DMAPAA) hydrogel decreased with an increase of SDS concentration.The phase transition temperature of p(NIPAAm-co-DMAPAA) hydrogels was found to be System organization of means denoting change of speed in Russian railway jargon almost independent of the SDS concentration.