在氧化还原引发剂作用下,通过水溶液聚合制备了丙烯酰胺(AM)与丙烯酰氧乙基三甲基氯化铵(DAC)的共聚物P(AM-DAC)。探讨了反应温度θ、引发剂质量分数w(I)、单体质量分数w(M)对聚合物特性黏度([η])的影响。在亚硫酸钠与过硫酸铵为引发剂...在氧化还原引发剂作用下,通过水溶液聚合制备了丙烯酰胺(AM)与丙烯酰氧乙基三甲基氯化铵(DAC)的共聚物P(AM-DAC)。探讨了反应温度θ、引发剂质量分数w(I)、单体质量分数w(M)对聚合物特性黏度([η])的影响。在亚硫酸钠与过硫酸铵为引发剂,w(I)=0.2%,w(M)=50%,θ=30℃,螯合剂乙二胺四钠盐(EDTA)用量为单体质量的0.02%的条件下,生成的聚合物的[η]达到160 mL/g。用IR证实了聚合物的结构;TG-DSC分析得到聚合物的玻璃化温度为130℃,热分解出现在244.6℃。对污泥进行了絮凝实验,结果表明聚合物30 m in内能迅速溶解,所生成的絮团粗大且不易破碎。展开更多
A water soluble PU macromonomer was synthesized starting from polyethylene glycol oxide, 2,4 toluene diisocyanate, using hydroxyethyl acrylate as end chain termination agent. It is revealed that the intrinsic viscosit...A water soluble PU macromonomer was synthesized starting from polyethylene glycol oxide, 2,4 toluene diisocyanate, using hydroxyethyl acrylate as end chain termination agent. It is revealed that the intrinsic viscosity of the aqueous solution and cloud point of the macromonomer became lower, and the association of the macromonomer became apparent as hydrophobic mass fraction in the macromonomer composition increased. It is also found that the aggregation state of PU macromonomer in aqueous solution is strikingly dependent on temperature and concentration. Hydrophobic association occurred between macromonomers themselves as the concentration of aqueous solution increased. At higher temperature the HLB value of the macromonomer became lower, and micelle formed at the temperature over 75 ℃ .展开更多
文摘在氧化还原引发剂作用下,通过水溶液聚合制备了丙烯酰胺(AM)与丙烯酰氧乙基三甲基氯化铵(DAC)的共聚物P(AM-DAC)。探讨了反应温度θ、引发剂质量分数w(I)、单体质量分数w(M)对聚合物特性黏度([η])的影响。在亚硫酸钠与过硫酸铵为引发剂,w(I)=0.2%,w(M)=50%,θ=30℃,螯合剂乙二胺四钠盐(EDTA)用量为单体质量的0.02%的条件下,生成的聚合物的[η]达到160 mL/g。用IR证实了聚合物的结构;TG-DSC分析得到聚合物的玻璃化温度为130℃,热分解出现在244.6℃。对污泥进行了絮凝实验,结果表明聚合物30 m in内能迅速溶解,所生成的絮团粗大且不易破碎。
文摘A water soluble PU macromonomer was synthesized starting from polyethylene glycol oxide, 2,4 toluene diisocyanate, using hydroxyethyl acrylate as end chain termination agent. It is revealed that the intrinsic viscosity of the aqueous solution and cloud point of the macromonomer became lower, and the association of the macromonomer became apparent as hydrophobic mass fraction in the macromonomer composition increased. It is also found that the aggregation state of PU macromonomer in aqueous solution is strikingly dependent on temperature and concentration. Hydrophobic association occurred between macromonomers themselves as the concentration of aqueous solution increased. At higher temperature the HLB value of the macromonomer became lower, and micelle formed at the temperature over 75 ℃ .
