一种聚四氟乙烯毛细管Ubbelodhe粘度计  

A Ubbelodhe Viscometer with Polytetrafluoroethylene Capillary

作　　者：蔡佳利[1] 薄淑琴[2] 秦汶[2] 严小虎 程镕时[1] 

机构地区：[1]南京大学化学化工学院 [2]中国科学院长春应用化学研究所,长春130022

出　　处：《应用化学》2001年第5期377-379,共3页Chinese Journal of Applied Chemistry

基　　金：国家攀登计划"高分子凝聚态基本物理问题"!(970 5 6 118;国家教委博士点基金;中国科学院长春应用化学研究所高分子物理与化学国家

摘　　要：设计制作了一种用聚四氟乙烯毛细管组成的 Ubbelodhe式粘度计 .将该粘度计试用于测量一个部分水解聚丙烯酰胺试样水溶液在较宽浓度区间直至极稀浓度时的粘度 .与常规玻璃粘度计相比 ,新粘度计避免了在普通玻璃粘度计中测量粘度时由于高分子吸附在毛细管管壁表面引起的干扰 .实验结果表明 ,高分子溶液粘度的所谓“聚电解质效应”A modified Ubbelodhe viscometer with polytetrafluoroethylene capillary has been fabricated. The newly constructed viscometer was tested and compared with conventional glass viscometer by measuring the aqueous solution viscosity of a partially hydrolyzed polyacrylamide sample covering a considerable wide concentration range down to extremely dilute region. The interference from polymer adsorption onto the capillary inner wall surface on the viscosity measurements is completely avoided when the new modified viscosimeter is used instead of common glass viscometer. The experimental results indicate that the so called “polyelectrolyte effect” of solution viscosity is just only an apparent phenomenon due to polymer adsorption.

关 键 词：改进型乌氏粘度计 聚四氟乙烯毛细管 高分子溶液 聚电解质粘度效应 粘度测量 

分 类 号：O631.21[理学—高分子化学] TH836[理学—化学]