聚合物(丙烯酰胺-N,N-二丁基丙烯酰胺)的流变学特性及其疏水缔合行为研究  

A Study on Rheological and Associative Behaviors of Hydrophobically Water-soluble Polymer DBA-AM

作　　者：赫庆鹏[1] 张贺[1] 赵金生[1] 孔瑛[2] 魏西莲[1] 

机构地区：[1]聊城大学化学化工学院,山东聊城252059 [2]中国石油大学(华东)化学化工学院,山东青岛266042

出　　处：《聊城大学学报（自然科学版）》2010年第2期33-37,共5页Journal of Liaocheng University:Natural Science Edition

基　　金：国家自然科学基金(20906043)

摘　　要：由N,N-丁基丙烯酰胺(DBA)与丙烯酰胺(AM)经自由基微乳液聚合制备了水溶性疏水缔合性DBA-AM共聚物.利用旋转流变仪和荧光光谱仪对水溶性疏水缔合性DBA-AM共聚物的流变学特性及其疏水缔合行为进行研究.结果表明,该共聚物溶液有两个临界缔合浓度(CAC):0.4g/L与0.6g/L.当聚合物溶液浓度小于0.4g/L时,溶液发生分子内和分子间缔合,主要以分子内缔合为主,增粘幅度较小;当溶液浓度大于0.6g/L时,DBA-AM共聚物强极性基团与水分子间形成强烈的氢键而溶解,分子间形成大量疏水微区,进而形成超分子聚集体及空间网络结构,表现为溶液宏观粘度急剧增加.The hydrophobically associating dibutylacrylamide/acrylamide（DBA/AM）copolymers were synthesized by aqueous micellar polymerization.Rheological and associative behaviors of water-soluble polymer DBA-AM were studied by means of rotary rheometer and fluorescence probe.The results showed that the copolymer solution has two critical associating concentrations（CAC）：0.4 g/L and 0.6 g/L.When the concentrations of the polymer were less than 0.4 g/L,the intra-and intermolecular association,mainly the intra molecular association takes place and result in increase of the polymer viscosities in a moderate range.When the polymer concentrations were above 0.6 g/L,the intense hydrogen bond were formed between polar groups of the polymer and H2O molecular,which lead to dissolution of the polymer.And,lots of hydrophobic domains formed inter polymer molecules,and even formed the super-molecular aggregate and space network structure,which represented the rapid increase in apparent viscosities.

关 键 词：疏水缔合 表观粘度 临界缔合浓度 流变性 

分 类 号：O64[理学—物理化学]