Viscosity of polyacrylonitrile solutions: The effect of the molecular weight

被引：14

作者：

Ilyin, S. O. ^{[1
]}

Chernikova, E. V. ^{[2
]}

Kostina, Yu V. ^{[1
]}

Kulichikhin, V. G. ^{[1
]}

Malkin, A. Ya ^{[1
]}

机构：

[1] Russian Acad Sci, Topchiev Inst Petrochem Synth, Moscow 119991, Russia

[2] Moscow MV Lomonosov State Univ, Fac Chem, Moscow 119991, Russia

来源：

POLYMER SCIENCE SERIES A | 2015年 / 57卷 / 04期

基金：

俄罗斯科学基金会;

关键词：

RHEOLOGICAL PROPERTIES; CONCENTRATED-SOLUTIONS; DIMETHYL-SULFOXIDE; POLYMER-SOLUTIONS; DEPENDENCE; COPOLYMERS; GELATION;

D O I：

10.1134/S0965545X15040070

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The copolymer of acrylonitrile with methyl acrylate and itaconic acid (93: 5.7: 1.3) is synthesized via free-radical copolymerization. For solutions of the initial copolymer and its 12 fractions in dimethyl sulfoxide, viscosities are measured in a wide shear-stress range. The viscosity behavior of 10% solutions is examined in more detail, and the rheological studies of several fractions are performed in the concentration interval from 5 to 20%. All solutions exhibit weak non-Newtonian behavior. This makes it possible to determine the zero-shear viscosity. The dependences of this viscosity on the number-average and weight-average molecular masses for the equiconcentrated solutions obey an exponential law with the same exponent, equal to 2.3. The macromolecules of copolymers are inclined toward association. For low-molecular-mass fractions, this effect is the most pronounced.

引用

页码：494 / 500

页数：7

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