羧甲基纤维素醋酸丁酸酯水分散体的流变性能  

Rheological Properties of Carboxymethyl Cellulose Acetate Butyrate Water Dispersions

作　　者：吕少一[1] 邵自强[1] 王飞俊[1] 王文俊[1] 李永红[1] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081

出　　处：《高分子材料科学与工程》2010年第8期54-57,共4页Polymer Materials Science & Engineering

摘　　要：采用动态实验方法研究了羧甲基纤维素醋酸丁酸酯水分散体的流变性能。通过考察溶剂体系、固含量、温度、中和度对其黏度、触变性、动态粘弹性的影响,确定了其流变参数。结果表明,水分散体的黏度随溶剂/水比例减小而增大;中和度在达到50%之前,黏度增加显著,而在50%之后趋于变缓;水分散体为正触变性流体,且随固含量和中和度的增大而增强,随温度的升高而减弱;水分散体在低固含量和中和度下为粘性流体,随着二者增大,开始形成不稳定的凝胶结构;水分散体的触变环、动态模量参数随中和度增大而增加,但在50%后增加变缓。The rheological properties of carboxymethyl cellulose acetate butyrate water dispersions（WD） have been investigated. Experiments including effect of solvent system, solid content, temperature and neutralization degree on viscosity, thixotropy loop, dynamic viscoelasticity were conducted. The results show that viscosity of WD increases as proportion of solvent/water decreased. Viscosity inceases remarkably before neutralization degree reaches 50%, then it increases slowly. WD is positive thixotropy fluid. The thixotropy increases with solid content and neutralization degree increased, but it decreases as temperature increase. WE） is viscous fluid at low solid content and neutralization degree. As these increase , WD begins to form instable gel structure. The thixotropy loop, G＇, G＂ and η^＊ of WD increase with neutralization degree increased. When the neutralization degree exceeds 50%, these above factors increase slowly.

关 键 词：羧甲基纤维素醋酸丁酸酯 水分散体 触变性 流变性 

分 类 号：TQ352.71[化学工程]