采用新疆奇台风化煤为原料,通过表面引发原子转移自由基聚合(SI-ATRP)方法制备腐植酸钠-聚甲基丙烯酸甲酯接枝共聚物(HA-Na-PMMA),通过正交实验确定了SI-ATRP最佳合成工艺条件:反应时间8 h,溴化亚铜∶溴化铜∶2,2-联吡啶质量比为20∶4∶...采用新疆奇台风化煤为原料,通过表面引发原子转移自由基聚合(SI-ATRP)方法制备腐植酸钠-聚甲基丙烯酸甲酯接枝共聚物(HA-Na-PMMA),通过正交实验确定了SI-ATRP最佳合成工艺条件:反应时间8 h,溴化亚铜∶溴化铜∶2,2-联吡啶质量比为20∶4∶20,物料质量比∶体积比为1 g∶10 m L,反应温度80℃。通过SI-ATRP制备的HA-Na-PMMA的接触角为84°,比HA-Na的接触角增大了54°,表明HA-Na的SI-ATRP接枝共聚效果显著。以HA-Na-PMMA为吸附剂,研究其对Cr(Ⅵ)的吸附性能,同时建立了HA-Na-PMMA对Cr(Ⅵ)的等温吸附模型,研究了其吸附热力学和吸附动力学。HA-Na-PMMA对Cr(Ⅵ)具有良好的吸附性能,其等温吸附模型符合Freundlich模型。吸附焓变为-0.2849 k J/mol,ΔGθ<0,所以吸附是自发的放热反应。常温下吸附速率常数KL为0.9113 mg/(g·min),表明其吸附动力学模型遵循Langmuir模型和Bingham模型。展开更多
A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,...A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,000 to 140,000 determined by GPC.The composition of terpolymers could be controled by adjusting the proportion of monomer.展开更多
文摘采用新疆奇台风化煤为原料,通过表面引发原子转移自由基聚合(SI-ATRP)方法制备腐植酸钠-聚甲基丙烯酸甲酯接枝共聚物(HA-Na-PMMA),通过正交实验确定了SI-ATRP最佳合成工艺条件:反应时间8 h,溴化亚铜∶溴化铜∶2,2-联吡啶质量比为20∶4∶20,物料质量比∶体积比为1 g∶10 m L,反应温度80℃。通过SI-ATRP制备的HA-Na-PMMA的接触角为84°,比HA-Na的接触角增大了54°,表明HA-Na的SI-ATRP接枝共聚效果显著。以HA-Na-PMMA为吸附剂,研究其对Cr(Ⅵ)的吸附性能,同时建立了HA-Na-PMMA对Cr(Ⅵ)的等温吸附模型,研究了其吸附热力学和吸附动力学。HA-Na-PMMA对Cr(Ⅵ)具有良好的吸附性能,其等温吸附模型符合Freundlich模型。吸附焓变为-0.2849 k J/mol,ΔGθ<0,所以吸附是自发的放热反应。常温下吸附速率常数KL为0.9113 mg/(g·min),表明其吸附动力学模型遵循Langmuir模型和Bingham模型。
文摘A series of styrene-acrylonitrile-acrylate(methyl acrylate,butyl acrylate,twelfth acrylate)terpolymers were prepared by bulk,solution and suspension polymeriation.The molecular weights of the terpolymers vary from 70,000 to 140,000 determined by GPC.The composition of terpolymers could be controled by adjusting the proportion of monomer.
