Intrinsic Viscosity of Aqueous Solutions of Carboxymethyl Guar in the Presence and in the Absence of Salt

被引：33

作者：

Badiger, Manohar V. ^{[1
]}

Gupta, Nivika R. ^{[1
]}

Eckelt, John ^{[2
,3
]}

Wolf, Bernhard A. ^{[2
,3
]}

机构：

[1] Natl Chem Lab, Polymer Sci & Engn Div, Pune 411008, Maharashtra, India

[2] Johannes Gutenberg Univ Mainz, Mat Wissensch Forschungszentrum, D-55099 Mainz, Germany

[3] Johannes Gutenberg Univ Mainz, Inst Phys Chem, D-55099 Mainz, Germany

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2008年 / 209卷 / 20期

关键词：

biopolymers; carboxymethyl guar; intrinsic viscosity; polyelectrolyte; salt-free solutions;

D O I：

10.1002/macp.200800238

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Intrinsic viscosities were determined for solutions of CMG in pure water and 0.9 wt.-% aqueous NaCl. To avoid the 0/0-type extrapolation typical for Huggins plots, a new procedure was used. For CMG and pure water, this requires only two adjustable parameters: the specific hydrodynamic volume of the polymer in the limit of infinite dilution and a hydrodynamic interaction parameter. The intrinsic viscosity of CMG (no salt) at room temperature is 6 050 mL . g(-1); approximately half as large as that of Na-PSS of comparable molar mass. The ratio of the intrinsic viscosities with and without salt is approximate to 7 for CMG, as compared to >100 for Na-PSS. The reasons 1:5 5 for the different behaviors of the two types of polyelectrolytes are being discussed.

引用

页码：2087 / 2093

页数：7

共 14 条

[11] ELECTROSTATIC PERSISTENCE LENGTH OF A WORMLIKE POLYELECTROLYTE [J].

SKOLNICK, J ;

FIXMAN, M .

MACROMOLECULES, 1977, 10 (05) :944-948

[12]

STAHL G, 1988, AM CHEM SOC P SPRING

[13]

Whistler R.L., 1959, IND GUMS POLYSACCHAR

[14] Polyelectrolytes revisited: Reliable determination of intrinsic viscosities [J].

Wolf, Bernhard A. .

MACROMOLECULAR RAPID COMMUNICATIONS, 2007, 28 (02) :164-170

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