The fluorescence spectra of twin-tailed hydrophobically associating water-soluble terpolymers poly(acrylamide/sodium acrylate/dioctylacrylamide)[P(AM/NaAA/DiC_8AM)] in redistilled water and in c(NaCl)=1 mol/L aqueous solution were examined.
The SAMPS/NVP/AM/SAA tetracopolymer was synthesized with sodium 2 acrylamido 2 methyl 1 propane sulfonate (SAMPS), N vinyl pyrrolidone (NVP), acrylamide (AM) and sodium acrylate (SAA) as raw materials.
The interpenetrating network of sodium acrylate(SA)-based superabsorbent and P(HPA/AMPS) (PSA-IP-(PHPA/AMPS)) were prepared by solution polymerization, in which KPS was used as initiator and N,N′-methylene bisacrylamide as crossinglinker.
Commercial hydrophobically associating polymer AP4 for EOR is synthesized from acrylamide,sodium acrylate,and alkyldimethylallylammonium chloride and has molar mass 1.7×10~6,hydrolysis degree 18.2%,hydrophobe content <1%,and critical association concentration,CAC,1000 mg/L as determined from its viscosity-concentration curve.
A high waterabsorbing copolymer resin based on sodium acrylate, acrylamide,2hydroxyethyl acrylate and N,N′methylenebisacrylamide was prepared by inverse suspension copolymerization and potassium persulfate/sodium acid sulfite as redox initiator,Span80/Tween80 as composite dispersing agent.
以丙烯酸(AA)、丙烯酰胺(AM)、丙烯酸羟乙酯(HEMA)为单体、N,N′ 亚甲基双丙烯酰胺为交联剂、过硫酸铵/亚硫酸氢钠为氧化还原引发剂、Span80/Tween80为复合悬浮分散剂,采用反相悬浮聚合法合成了AA AM HEMA三元共聚高吸水性树脂。
The results indicated that bagasse graft poly(sodium acrylate) has relatively high capacity of water absorption when radiation dosage reached 2.0 kGy,and the ratio of sodium acrylate and bagasse is 2∶1.The prepared product can absorb 220g of tap water and 798g of deionized water per gram,respectively.
A new superabsorbent composite polymer (SAP) has been prepared by graft copolymerization reaction using starch, ethyl methacrylate (EMA), benzoyl peroxide (BPO) as initiator and sodium acrylate as crosslinking agent.
The stable suspension polymerization of sodium acrylate was carried out in the presence of a surfactant complex consisting of anionic surfactant dodecylbenzen sulfonic sodium (DSS) and nonionic surfactant Span60 or Span20 with a certain ratio.
It has been described that the water-solubLe polyacrylamid and the acrylamid-a crylate copolymer were prepared by polymerization of acrylamid and sodium acrylate in aqeous, which was initialed by a new system of Manganate sulfate sodium bisulfite。
The reactivity ratios of radiation copolymerization of the system ofacrylamide (AM) and sodium acrylate (AANa) were studied in aqueous solution at roomtemperature and pH range from 7.4 to 12.1. The copolymerization carried out with highconversion and the monomer reactivity ratios r_1 (AM) and r_2 (AANa) were calculatedusing the Mayo-Lewis integration equation. There are no evident differences since r_1 va-ries from 0.9 to 1.18 and r_2 from 0.32 to 0.48 respectively.
Copolymerization of acrylamide and sodium acrylate initiated by K_2S_2O_8-NH_2CONH_2was studied. The molecular weight and composition of copolymers can be effectively con-trolled by addition of various amounts of chain-transfer agent and by changing the pHand temperature of reaction system up to 98-100% conversion. Water-soluble copolymerswith intrinsic viscosity of 2-28dl/g and sodium acrylate content of 0-100 mol.% wereobtained.The copolymers were found to be in agreement with that...