Study On Synthesis And Properties Of Oligomeric Cationic Polymers

This synthesis of a main-chain cationic polymers PHDAC and two owners have a quarter of the side chain nitrogen atom of the cationic polymer PDAEA-1 and PDAEA-12, and studied their synthesis methods and performance.With diethanolamine and epichlorohydrin as raw materials, synthesis of main-chain cationic polymers PHDAC, the reaction system by chlorine ion content and epoxy value to determine the polymerization of epichlorohydrin with the reaction of diethanolamine to phase polymerization. Determined by experimental conditions, reaction conditions: reaction temperature 60℃, reaction time 6h, n_{epichlorohydrin}:n_{diethanolamine}=1:1, of solvent mass fraction 20%. Under these conditions, the product of the synthesis of cationic degree reached 45.3%, of intrinsic viscosity number 2.64dL/g.With diethanolamine, thionyl chloride, trimethylamine, 12 alkyl dimethyl amine and epichlorohydrin as raw materials, through the quaternary ammonium, copolymerization reactions, synthesized the main, side-chain nitrogen atoms of the cation has a quarter of Polymer PDAEA-1 and PDAEA-12. PDAEA-1 and PDAEA-12 synthesis in three steps, first by diethanolamine and thionyl chloride, the reaction of first intermediate bis (2-chloroethyl) amine hydrochloride, then under the action of the alkali-free out of pairs of (2-chloroethyl) amine, and trimethylamine (or 12 alkyl dimethyl amine) reaction of second intermediate DA-1 and DA-12, the final copolymer with epichlorohydrin reaction of cationic polymerization material PDAEA-1 and PDAEA-12.By examining the reaction time, reaction temperature, solvent, reactant molar ratio on the conversion rate of reactants, to determine: first intermediate bis (2-chloroethyl) amine hydrochloride synthesis conditions were: solvent mass fraction 30%, reaction temperature 70℃, reaction time 6h, n_{thionyl chloride}:n_{diethanolamine}=2.6:1 ethanolamine. Under these conditions, synthesis of bis (2-chloroethyl)amine hydrochloride a melting point of 212-217℃, of 2 ethanolamine conversion rate 96.1%; The second intermediate DA-1 synthesis conditions were: reaction time 8h, the reaction temperature 45℃, n_{trimethylamine}:n_{pairs(2-chloroethyl)aminehydrochloride}=2.4:1. Under these conditions, bis (2-chloroethyl) amine conversion rate was 65.9%; The second intermediate DA-12 synthesis conditions for the reaction time 10h, reaction temperature 85℃, n_{12 alkyl dimethyl amine}:n_{pairs (2-chloroethyl) amine}=2.2:1, solvent 35%, Under these conditions, bis (2-chloroethyl) amine conversion rate was 84.5%; Cationic polymer PDAEA-1 synthesis conditions were: reaction temperature 65℃, nDA-1:nepichlorohydrin=1.2:1, reaction time 6h, solvent 30%, in this condition PDAEA-1 of the cationic degree 83.9%; cationic polymer PDAEA-12 synthesis conditions were: reaction temperature 65℃, n_DA-12:n_{epichlorohydrin}=1.2:1, reaction time 4h, solvent 40% in this condition of PDAEA-12 cationic degree 73.1%.Three kinds of cationic polymers on the swelling properties were compared against results show that the structure of the main side-chain containing the quaternary nitrogen atoms are cationic polymer is superior to anti-swelling cationic polymer main-chain type. In the of polymer concentration 3%, PHDAC, PDAEA-1, PDAEA-12 anti-swelling rates were 84.0%, 96.3% and 88.0%...