Supercritical Co <sub> 2 </ Sub> Hydrophobically Modified Polyacrylamide And Composite Synthesis

More than eight kind of hydrophobically-modified polyacrylamide products were successfully synthesized when supercritical CO₂ and the acetone solvent was presented.It will help to develop the producing method of polyacrylamide,widen the applying field of polyacrylamide.Further more,it makes it possible for insoluble solids polymerizing under the condition of supercritical CO₂,helps the researcher find a new way of polymerizing in supercritical CO₂.The copolymerization of acrylamide(AM) and 12 fluorin substituted heptanol methacrylic acid carter(G04) was studied in detail with benzoyl peroxide(BPO) as initiator when supercritical CO₂ and the acetone solvent were presented.Through single factor experiments and orthogonal experiments,the copolymerization law of acrylamide and G04,the optimum reaction conditions were studied.Water-soluble experiment of the products,viscosity of different product solutions were tested to measure the hydrophobic nature.The structure of the copolymer product was illustrated by infrared(IR) spectroscopy,mass spectrum(MS) and ¹H-NMR analysis. The thermal stability of the product was also analyzed by employing thermal gravimetric analysis(TG).The kinetics of the copolymerization was studied.The free radial reaction of AM and G04 was presented.The competition rate of AM and G04 was calculated.The influences of temperature,pressure and cosolvent were also discussed,the relationship between the composition of copolymerization and translation rate was got.The copolymerizations of AM,G04 and MMA and the copolymerization of acrylamide,G04 and Maleic acid anhydride with supercritical CO₂+acetone solvent were studied.The structure of the copolymer products was illustrated by infrared(IR) spectroscopy and ¹H-NMR analysis..Through the applying experiment,it showed the products had a character.of excellent bibulous and furring preventing. The single esterification of maleic acid anhydride and polyethylene glycol(PEG400) was studied.Then the copolymerization between AM,G04 and Maleic acid anhydride-PEG400 with supercritical CO₂+acetone solvent was studied.The esterification of maleic acid anhydride and Taurine was also got.Then the copolymerization of AM,G04 and Maleic acid anhydride-Taurine maleic acid with supercritical CO₂+acetone solvent was studied.The structure of the copolymer products was illustrated by infrared(IR) spectroscopy,mass spectrum(MS) and ¹H-NMR analysis.The copolymerizations of AM,G04,MMA and Maleic acid anhydride -PEG400,the copolymerizations of AM,G04 vinyl cyanide and Maleic acid anhydride-PEG400,the copolymerizations of AM,G04 crylic acid and Maleic acid anhydride-PEG400 with supercritical CO₂+acetone solvent were studied.The products have some special characters. The structure of the copolymer products were illustrated by infrared(IR) spectroscopy,mass spectrum(MS) and ¹H-NMR analysis.