均相CMC/HEC复合溶液的流变性  

Rheological Characteristics of Homogeneous CMC/HEC Complex Solution

作　　者：张黎明[1] 黄少杰[1] 陈丹青 

机构地区：[1]中山大学高分子研究所,广州510275

出　　处：《Chinese Journal of Chemical Physics》1999年第3期380-384,共5页化学物理学报（英文）

基　　金：中国科学院纤维素化学开放实验室和山东大学国家教委胶体与界面化学开放实验室资助

摘　　要：用旋转粘度计研究了均相羧甲基纤维素（ＣＭＣ）／羟乙基纤维素（ＨＥＣ）复合溶液的流变性，考察了复合比、浓度、外加小分子盐和温度对其流变性能的影响。结果表明，复合溶液为典型的非牛顿剪切变稀流体，其粘性指数ｎ＜１：与单一ＣＭＣ和ＨＥＣ溶液相比较，具有一定复合比的ＣＭＣ／ＨＥＣ复合溶液增稠性能更好、非牛顿性更强，而且其粘流活化能较ＣＭＣ溶液低。?The rheological characteristics of homogeneous carboxymethyl-cellulose (CMC) /hydroxyethylcellulose (HEC) complex solution have been studied by rotation viscosimeter.The investigated adning factors include the complexation ratio, solution concentration.salt and temperature. The complex solutions behave generally as a typical non--Newtonianshear-thinning fluid with a characteristic n-parameter lower than 1. The viscosity versustemperature relationship of the complex solution can be expressed in the form of anArrhenius--type equation. Compared with individual CMC solution or HEC solution. thecomplex solution with Certain complexation ratio has better viscosification property andstronger non--Newtonian nature, which are reflected by the calculated characteristic rheologicalparameters n and K. In addition, the viscous flow activation energy of the complex solution islower than individual CMC solution, indicating that the complex solution has little sensitivitytowards temperature than the latter.

关 键 词：高分子 复合溶液 流变特性 CMC HEC 

分 类 号：O636.11[理学—高分子化学] O631.4[理学—化学]