摘要：
测定了聚丙烯酸(PAA) 和丙烯酸/ 甲基丙烯酸-B-羟乙基酯(AA/ HEA) 的特性粘数, 比较了用九个经验式求得的特性粘数差异, 指出了实验体系的Hugg ins 常数k′较大(0. 443～0. 726) 是造成部分计算结果偏差较大的原因, 提出了一个k′取0. 64 的简易一点法公式。用该公式计算的24 个数据中, 相对偏差小于1%的数据为12个, 好于用已知九个公式计算的结果。
关键词:
聚丙烯酸,
特性粘数,
一点法,
Huggins常数
Abstract:
Intrinsic viscosities of poly acry licacid (PAA) and copolymer of acrylic acid and B-hydro xy ethyl methylacrylate (AA/HEA) were determined. The differ ences of these viscosities obtained by nine empirical formulae wer e compared and t he reason w hy som e results fr om t ho se formulae have large deviatio is that the exper imental systems have large Hug gins'constants (k' from 0. 443～0. 726). A modified formula for one-point measur ement with k' equal to 0.64 w as proposed, which is easy for calculating intrinsic viscosity.Among 24 viscosities from the new formula, 12 viscosities have smaller deviations than 1%, which is better than the results from the nine known formulae.
Key words:
polyacrylicacid,
intrinsicviscosity,
one point measurement,
Hug gins' constant
王京, 陆婉珍. 一点法求聚丙烯酸的特性粘数[J]. 工业水处理, 1998, 18(6): 32-34,46.
Wang Jing, Lu Wanzhen. CALCULATION OF INTRINSIC VISCOSITY OF POLYACRYLIC ACID FROM ONE-POINT MEASUREMENTS[J]. INDUSTRIAL WATER TREATMENT, 1998, 18(6): 32-34,46.