聚电解质溶液浓度区域的划分  

DIVISION OF THE CONCENTRATION RANGES OF POLYELECTROLYTE SOLUTIONS

作　　者：蔡佳利[1] 薄淑琴[2] 程镕时[3] 

机构地区：[1]南京大学生命科学学院,南京210093 [2]中国科学院长春应用化学研究所高分子物理与化学国家重点实验室,长春130022 [3]南京大学化学化工学院

出　　处：《高分子学报》2004年第5期625-627,共3页Acta Polymerica Sinica

基　　金：国家教育部博士点基金 (基金号 2 0 0 3 0 2 840 0 3 )资助项目;高分子物理与化学国家重点实验室基金资助项目

摘　　要：The degree of ionization of polyacrylic acid and pure sodium polyacrylate solutions covering a wide concentration range was deteremined by measuring the pH values of these solutions.The results show that the degrees of ionization are very sensitve to the location of the concentration range of polyelectrolyte solutions.The concept of dynamic contact concentration proposed by Qian Renyuan and the principle of division of flexible neutral polymer solutions into four concentration ranges namely extremely dilute,dilute,semidilute and concentrated solutions are confirmed to be universally applicable to polyelectrolyte solutions.The degree of ionization of polyacrylic acid and pure sodium polyacrylate solutions covering a wide concentration range was determined by measuring the pH values of these solutions. The results show that the degrees of ionization are very sensitive to the location of the concentration range of polyelectrolyte solutions. The concept of dynamic contact concentration proposed by Qian Renyuan and the principle of division of flexible neutral polymer solutions into four concentration ranges namely extremely dilute, dilute, semidilute and concentrated solutions are confirmed to be universally applicable to polyelectrolyte solutions.

关 键 词：聚电解质 电离度 浓度区域 聚丙烯酸 特性粘数 离解 聚丙烯酸钠 水解 

分 类 号：O645[理学—物理化学]