Investigation of pH dependence of poly(acrylic acid) conformation by means of electric birefringence

被引：14

作者：

Hoffmann, Heinz ^{[2
]}

Kamburova, Kamelia ^{[1
]}

Maeda, Hiroshi ^{[3
]}

Radeva, Tsetska ^{[1
]}

机构：

[1] Bulgarian Acad Sci, Inst Phys Chem, Sofia, Bulgaria

[2] Univ Bayreuth, Bayreuther Zentrum Kolloide & Grenzflachen, Bayreuth, Germany

[3] Kyushu Univ, Fukuoka 812, Japan

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2010年 / 354卷 / 1-3期

关键词：

Polyelectrolyte conformation; Conformational transitions of polyacrylic acid; Electric birefringence of polymers; Counterion condensation; POLYELECTROLYTE SOLUTIONS; POTENTIOMETRIC TITRATION; FIELDS;

D O I：

10.1016/j.colsurfa.2009.07.032

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Conformational transitions of polyacrylic acid with two different molecular weights (PAA100 and PAA250) have been investigated by means of electric birefringence method. The conformation of the polymer chains has been found to depend on pH, showing slight increase in the chain length up to a degree of neutralization 0.3 (ca. pH 6) and, after an almost plateau value, sharply increase to a maximum near the equivalence point. This was attributed to changes in the degree of polyelectrolyte ionization with variation of pH. A model was proposed that interprets the experimental results in the light of the counterion condensation approach. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：61 / 64

页数：4

共 15 条

[1] CALORIMETRIC INVESTIGATION OF POLY(METHACRYLIC ACID) AND POLY(ACRYLIC ACID) IN AQUEOUS-SOLUTION [J].

CRESCENZI, V ;

DELBEN, F ;

QUADRIFO.F .

JOURNAL OF POLYMER SCIENCE PART A-2-POLYMER PHYSICS, 1972, 10 (02) :357-+

[2] CALORIFIC CAPACITY OF POLY-ELECTROLYTES IN SOLUTION [J].

DAOUST, H ;

THANH, HL ;

FERLAND, P ;

STCYR, D .

CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1985, 63 (07) :1568-1571

[3]

Fredericq E., 1973, Electric Dichroism and Electric Birefringence

[4] Electric birefringence and zero-shear viscosity studies of the conformational changes of polyacrylic and polymethacrylic acids with pH and concentration [J].

Hoffmann, H ;

Liveri, MLT ;

Cavasino, FP .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1997, 93 (17) :3161-3165

[5]

KRAMER U, 1991, MACROMOLECULES, V24, P256

[6] POTENTIOMETRIC TITRATION OF WEAK POLYACIDS [J].

MANDEL, M .

EUROPEAN POLYMER JOURNAL, 1970, 6 (06) :807-&

[7] On the Apparent Saturation of the Dipole Induced in a Rodlike Polyion at High Electric Fields [J].

Manning, Gerald S. .

JOURNAL OF PHYSICAL CHEMISTRY B, 2009, 113 (08) :2231-2233

[8] LIMITING LAWS AND COUNTERION CONDENSATION IN POLYELECTROLYTE SOLUTIONS .I. COLLIGATIVE PROPERTIES [J].

MANNING, GS .

JOURNAL OF CHEMICAL PHYSICS, 1969, 51 (03) :924-&

[9] A CONDENSED COUNTERION THEORY FOR POLARIZATION OF POLYELECTROLYTE SOLUTIONS IN HIGH FIELDS [J].

MANNING, GS .

JOURNAL OF CHEMICAL PHYSICS, 1993, 99 (01) :477-486

[10] POTENTIOMETRIC TITRATION OF STEREOREGULAR POLYELECTROLYTES [J].

NAGASAWA, M ;

MURASE, T ;

KONDO, K .

JOURNAL OF PHYSICAL CHEMISTRY, 1965, 69 (11) :4005-&

← 1 2 →