聚合型乳化剂反相乳液聚合法制备印花增稠剂

以煤油为连续相,水为分散相,Span80丙烯酸酯/Span80/Twen80为复配乳化剂,过硫酸钾和亚硫酸氢钠为引发剂,N,N'-亚甲基双丙烯酰胺为交联剂,丙烯酸、丙烯酸钠为单体,采用反相乳液聚合法合成印染增稠剂。考察了交联剂用量、丙烯酰胺用量、引发剂浓度、单体浓度、聚合温度、反应时间等对增稠剂黏度和聚合转化率的影响,确定了最佳实验条件,并考察了增稠剂的抗电解质性及流变特性。实验结果表明较理想反应条件为:煤油45 g,水相60 g,质量比为0.8:0.3:0.1的三元乳化剂(可聚合乳化剂、Span80与 Twen80)在乳液中质量分数为6.67%,水相中丙烯酸一丙烯酸钠浓度为3 mol/L,总单体中丙烯酸钠摩尔分数为0.82,n(交联剂):n(总单体)=1.803×10~(-3),n(丙烯酰胺):n(总单体)=0.063,m(引发剂用量):m(总单体)=0.036%,反应时间为7 h,反应温度为23℃。该增稠剂具有较好的抗电解质性及流变特性。

STUDY ON PRINTING AND DYEING THICKENER PREPARED BY INVERSE EMULSION POLYMERIZATION WITH POLYMERISABLE EMULSIFIER

Acrylic acid and sodium acrylate solution were used to synthesize printing and dyeing thick- ener agent by inverse emulsion polymerization with Kerosene oil as continuous phase and water as dis- persed phase and SpanS0 acrylate/SpanS0/TwenS0 as the emulsifier and N,N'-methylenebisacrylam- ide as cross-linking and potassium persulfate and sodiumbisulfite as initiator.The effects of dosages of cross-linking agent and acrylamide,initiator concentration,monomer concentration,reaction tempera- ture,reaction time on thickener viscosity and polymerization translation degree have been studied. The anti-electrolyte and rheological behavior has also been investigated.The optimum conditions were found as follows:45 g Kerosene oil,60 g water,6.67% emulsifier with the molar ratios of re(Span80 acrylate):rn(Span80):m(Twen80)=0.8:0.3:0.1,monomer concentration 3 mol/L with 82% sodium acrylate,n(cross-linking agent):n(monomer)=1.803×10~(-3),n(acrylamide):n(mono- mer)=0.063%,m(initiator):m(monomer)=0.036%,reaction time is 7 h and reaction temperature is 23℃.The printing and dyeing thickener agent has good anti-electrolyte and rheological behavior.