为提高疏水缔合聚丙烯酰胺的性能,以1H,1H,2H,2H-十七氟癸烷丙烯酸酯(HFA)为疏水单体,以丙烯酰胺(AM)、丙烯酸(AA)为水溶性单体,采用胶束聚合法合成了含氟疏水缔合聚丙烯酰胺(FAPAM)。用红外光谱仪对产物结构进行了表征,研究了AA和HFA...为提高疏水缔合聚丙烯酰胺的性能,以1H,1H,2H,2H-十七氟癸烷丙烯酸酯(HFA)为疏水单体,以丙烯酰胺(AM)、丙烯酸(AA)为水溶性单体,采用胶束聚合法合成了含氟疏水缔合聚丙烯酰胺(FAPAM)。用红外光谱仪对产物结构进行了表征,研究了AA和HFA加量对FAPAM表观黏度和相对分子质量的影响,考察了FAPAM的耐温性、抗剪切性、抗盐性及交联性。研究结果表明,FAPAM为AM、AA、HFA的三元共聚物;AA和HFA加量分别为单体总质量的30%～40%和0.5%时,合成的FAPAM的表观黏度(3376.7 m Pa·s)最大。FAPAM的耐温性较好,在110℃下放置1 h后的表观黏度大于100 m Pa·s;FAPAM的抗剪切性较好,在300 r/min下剪切48 h的表观黏度大于500 m Pa·s;在Na^+或Ca^(2+)质量浓度为0.5 g/L时,FAPAM的表观黏度大于50 m Pa·s,抗盐性好于PAM(HFA加量为0);在30℃下,FAPAM可与有机铬快速交联。FAPAM的耐温性、抗盐性和耐剪切性均优于PAM,可以作为压裂液稠化剂使用。展开更多
Methyl methacrylate（MMA）—butyl acrylate（BA）—acrylic acid（AA） copolymer emulsion was prepared by emulsion polymerization using a redox initiation system of（NH4）2SO8-NaSO3.Factor of affecting copolymerization ...Methyl methacrylate（MMA）—butyl acrylate（BA）—acrylic acid（AA） copolymer emulsion was prepared by emulsion polymerization using a redox initiation system of（NH4）2SO8-NaSO3.Factor of affecting copolymerization and emulsion performance were studied.The experimental results show that the reaction rate,latex′s particle diameter and emulsion performance are affected by AA content.It is not important that the influence of composition of MMA-BA on the film forming.By seeding emulsion polymerization,copolymer emulsion stability is very well.Feeding ammonia water,the copolymer emulsion dissolved.Copolymer film is very good.展开更多
文摘为提高疏水缔合聚丙烯酰胺的性能,以1H,1H,2H,2H-十七氟癸烷丙烯酸酯(HFA)为疏水单体,以丙烯酰胺(AM)、丙烯酸(AA)为水溶性单体,采用胶束聚合法合成了含氟疏水缔合聚丙烯酰胺(FAPAM)。用红外光谱仪对产物结构进行了表征,研究了AA和HFA加量对FAPAM表观黏度和相对分子质量的影响,考察了FAPAM的耐温性、抗剪切性、抗盐性及交联性。研究结果表明,FAPAM为AM、AA、HFA的三元共聚物;AA和HFA加量分别为单体总质量的30%～40%和0.5%时,合成的FAPAM的表观黏度(3376.7 m Pa·s)最大。FAPAM的耐温性较好,在110℃下放置1 h后的表观黏度大于100 m Pa·s;FAPAM的抗剪切性较好,在300 r/min下剪切48 h的表观黏度大于500 m Pa·s;在Na^+或Ca^(2+)质量浓度为0.5 g/L时,FAPAM的表观黏度大于50 m Pa·s,抗盐性好于PAM(HFA加量为0);在30℃下,FAPAM可与有机铬快速交联。FAPAM的耐温性、抗盐性和耐剪切性均优于PAM,可以作为压裂液稠化剂使用。
文摘Methyl methacrylate（MMA）—butyl acrylate（BA）—acrylic acid（AA） copolymer emulsion was prepared by emulsion polymerization using a redox initiation system of（NH4）2SO8-NaSO3.Factor of affecting copolymerization and emulsion performance were studied.The experimental results show that the reaction rate,latex′s particle diameter and emulsion performance are affected by AA content.It is not important that the influence of composition of MMA-BA on the film forming.By seeding emulsion polymerization,copolymer emulsion stability is very well.Feeding ammonia water,the copolymer emulsion dissolved.Copolymer film is very good.
