2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The ef...2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65～70% based on the theoretical calculation under optimized experimental conditions.展开更多
In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptano...In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptanoate in high yields. The monomer 4 was then synthesized from 2 in two steps readily in high yields. Synthesis and characterization of copolymers of acrylamide (AM) and the fluoromonomer were investigated. The composition and intrinsic viscosity of these copolymers were studied. It was found that the rheological properties of aqueous solutions of polyacrylamide were modified significantly when a small proportion of the fluoromonomer 4 was incorporated on investigating the viscosity-concentration profiles, pseudoplasticity of these solutions and the effect of the presence of surfactant. These results could be explained by the hydrophobic association of the fluorocarbon segments in the aqueous solutions of these copolymers.展开更多
文摘2,2,3,3-tetrafluoropropyl acrylate(TFPA)was prepared by esterification of acrylic acid and 2,2,3,3-tetrafluoropropanol in the presence of polymerization retarder,dehydration agent and concentrated sulfuric acid.The effect of polymerization retarader,the amount of sulfuric acid and reaction duration on the yield of TFPA was reported.The results showed that the yield of TPFE was 65～70% based on the theoretical calculation under optimized experimental conditions.
基金Project supported by National Natural Science Foundation,Grant approval numbers 29472074 and 29632003
文摘In this article, the synthesis and characterization of a novel fluoromonomer and its copolymer with acrylamide is reported. 2-perfluoroamyl-4-hydroxylquinoline 2 was synthesized from ethyl 2, 2-dihydroperfluoroheptanoate in high yields. The monomer 4 was then synthesized from 2 in two steps readily in high yields. Synthesis and characterization of copolymers of acrylamide (AM) and the fluoromonomer were investigated. The composition and intrinsic viscosity of these copolymers were studied. It was found that the rheological properties of aqueous solutions of polyacrylamide were modified significantly when a small proportion of the fluoromonomer 4 was incorporated on investigating the viscosity-concentration profiles, pseudoplasticity of these solutions and the effect of the presence of surfactant. These results could be explained by the hydrophobic association of the fluorocarbon segments in the aqueous solutions of these copolymers.
