The Synthesis And Polymerization Of A Series Of Polymerizable Ionic Liquid Surfactants

In this paper, a series of polymerizable ionic liquid surfactants1-acryloyloxypropyl-3-alkylimidazolium chloride([APCnim][Cl]) and ionic liquid surfactants1-propionyloxypropyl-3-alkylimidazolium chloride([PPCnim][Cl]) were synthesized, their surface properties weredetermined and compared. Furthermore, the thermodynamic behavior of micellization of[PPCnim][Cl] in aqueous solution was investigated. Both the binary copolymerization of[APC10im][Cl] and acrylamide(AM) and the ternary copolymerization of [APC10im][Cl], AMand sodium-2-acrylamido-2-methyl-propane-sulfonate(NaAMPS) were carried out by singleelectron transter living radical polymerization(SET-LRP), and properties of the correspondingcopolymers were researched. The specific contents are as follows:1、a series of [APCnim][Cl](n=8,10,12) and [PPCnim][Cl](n=8,10,12,14) were synthesiz-ed with imidazole, acryloyl chloride, propionyl chloride,-bromoalkane with different alkylchain,1-chloro-3-hydroxypropane as main materials. The result of IR and1H NMR analysisindicated that the target products were synthesized successfully. The drop volume method wasused to determine the surface tension of [APCnim][Cl] and [PPCnim][Cl](n=8,10,12) inaqueous solution at25℃, results show that these surfactants have high surface activity anddouble bond has almost no effect on the surface properties of [APCnim][Cl]. Furthermore, thesurface tension of [PPCnim][Cl](n=10,12,14) in aqueous solution at different temperature wasdetermined. Research shows that the micellization of [PPCnim][Cl] in aqueous solution isspontaneous and entropy-driven; as the temperature rises, the ability of micellization increasesinitially and then decrease; there is a enthalpy-entropy compensation phenomenon in thismicellization process.2、 Both the binary copolymerization of [APC10im][Cl] and AM and the ternarycopolymerization of [APC10im][Cl], AM and NaAMPS were carried out by SET-LRP with2-chloropropyl amide as initiator, Cu0as catalyst and self-made Me6-TREN as ligand inaqueous solution. The characterization by IR and1H NMR proved that the target productswere synthesized successfully.3、The effect of time, external copper chloride, catalyst and temperature on thepolymerization was investigated in binary and ternary copolymerization respectively. Resultsshow that the time dependence of both ln([M]0/[M]) and monomer conversion increaseslinearly meanwhile molecular weight distribution of copolymer is narrow, which accord withthe characteristics of living polymerization. Either increasing the amount of catalyst or addinga small amount of copper chloride leads to the increase of polymerization rate and thedecrease of molecular weight distribution to promote control/living polymerization. However,raising temperature leads to the increase of polymerization rate and molecular weightdistribution. 4、The effect of monomer composition, amount of polymer and intrinsic viscosity onflocculation performance of bipolymer was investigated. Results show that flocculation effectbecomes better when increaseing monomer composition and it increases initially and thendecreases with the increase of intrinsic viscosity or amount of polymer, there exist a optimumvalue for intrinsic viscosity and amount of polymer. In addition, the salt solution properties ofterpolymer was researched; the intrinsic viscosity increased with the increase of concentratonof sodium chloride, which indicated that the terpolymer has good anti-polyelectrolyte solutionbehavior.