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 SDS concentration was studied. The p(NIPAAmco-DMAPAA) hydrogels exhibited larger swelling capacity than the homo p(NIPAAm) hydrogel. https://allfixelectricales.shop/product-category/gas-oven-regulator/