激光光散射研究丙烯酰胺-二甲基二烯丙基氯化铵共聚物的溶液行为  

LASER LIGHT SCATTERING STUDY ON SOLUTION BEHAVIOR OF POLY(ACRYLAMIDE-co-DIMETHYLDIALLYLAMMONIUM CHLORIDE)

作　　者：张珍坤[1] 左榘[2] 刘静[1] 安英丽[3] 牛爱珍[3] 张志光[1] 何炳林[3] 淡宜[2] 王琪[2] 

机构地区：[1]南开大学化学系,天津300071 [2]四川大学高分子材料工程国家重点实验室,成都610065 [3]南开大学吸附分离功能高分子材料国家重点实验室,天津300071

出　　处：《高分子学报》2002年第5期572-576,共5页Acta Polymerica Sinica

基　　金：高分子材料工程国家重点实验室资助项目

摘　　要：用激光光散射技术表征了阳离子含量受控的丙烯酰胺 二甲基二烯丙基氯化铵共聚物 (简称P(AM DMDAAC) )在 0 1mol LNaCl溶液中的基本参数和溶液行为 .表观基本参数 : Mw ,app =5 0 4× 10 5g·mol- 1 、<Rg>app =39 9nm和A2 ,APP =1 5× 10 - 4cm3·mol·g- 2 .动态光散射研究结果表明 ,扩散系数Dt 与角度、浓度皆呈非线性依赖关系 ,当C >C 或在较大的散射角域 ,Dt 偏离线性关系所预示的理论值而向减小的方向发展 ,表明存在缔合物 ;流体力学半径Rh 分布有大、小两个范围 ,并随温度升高向小尺寸方向发展 ,证明了体系中存在缔合行为以及升温的解缔合作用 .在一定条件下 ,“亚稳定性”Polymer flooding agents play an important role in enhanced oil recovery (EOR). A new way to prepare polymer flooding agents through complexation of two oppositely charged polymers has attracted much attention. Poly (acrylamide-co-dimethyldiallylammonium chloride) [P(AM-DMDAAC)] is a novel cationic polycletrolyte which can be used as the component of polyelectrolyte complex for EOR. The basic parameters and behavior of P (AM-DMDAAC) in which cationic component is controlled, in 0.1 mol/L NaCl aqueous solution were characterized by dynamic and static laser light-scattering. The apparent basic parameters of P( AM-DMDAAC) are as follows: (M) over bar (w,app) = 5.04 x 10(5) g.mol(-1), < R-g >(app) = 39.9 nm, A(2,app) = 1.57 x 10(-4) cm(3).mol.g(-1). From the results of dynamic light scattering, the curves of D-t versus c and scattering angle theta, all are nonlinear and turning down. The phenomena imply that both the chains of P(AM-DMDAAC) in 0.1 mol/L NaCl aqueous solution appear polydispersity and there are some associates. Furthermore, the distribution ranges of the hydrodynamic radii (R-h) can be divided into two parts, for R-h value, one part is relative smaller, another is relative larger. Reasonably, the later can be attributed to association. When temperature raises, both parts develop towards the direction of the reducing R-h, so the behaviors of association and disassociation are evidenced again. Under certain conditions, the existing of 'metastable behavior' is a power circumstantial evidence for association behavior of P(AM-DMDAAC) in 0.1 mol/L NaCl aqueous solution. These results provide basic data for preparing novel flooding agents by complexation of polyelectrolyte.

关 键 词：激光光散射 聚丙烯酰胺-二甲基二烯丙基氯化铵 溶液行为 缔合 解缔合 聚合物驱油 

分 类 号：O631.4[理学—高分子化学]