EFFECT OF IONIC-STRENGTH ON THERMODYNAMIC PARAMETERS IN POLYELECTROLYTE COMPLEX-FORMATION REACTIONS

被引：0
|
作者：
KANBAYASHI, S [1 ]
ARAI, T [1 ]
机构：
[1] NIHON UNIV,COLL IND TECHNOL,CHIBA 275,JAPAN
来源：
KOBUNSHI RONBUNSHU | 1994年 / 51卷 / 05期
关键词：
POLY(DIALLYLDIMETHYLAMMONIUM CHLORIDE); METHYL GLYCOL CHITOSAN; POLYACRYLAMIDE; IONIC STRENGTH; POLYELECTROLYTE COMPLEX FORMATION; COMPLEX STABILITY CONSTANT; FREE ENERGY CHANGE; ENTHALPY CHANGE; ENTROPY CHANGE;
D O I：
10.1295/koron.51.323
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly(diallyldimethylammonium chloride) (PDDACl) and methyl glycol chitosan (MGCh) were allowed to react with partially anionized polyacrylamide (PAAm-H) to produce polyelectrolyte complexes (PEC). Thermodynamic parameters for the PEC formation were determined. In each system, a gain of large negative standard free energy (DELTAG-degrees) accompanied the PEC formation, but DELTAG-degrees became a large positive value with increasing ionic strength (I). We found that in the MGCh system the higher ionic strengths showed stronger tendencies for the entropy dominating type PEC formation reaction. In PDDACl system, the effects of enthalpy and entropy on DELTAG-degrees were the same in the region of low ionic strength; however, the entropy dominating type PEC reaction proceeded in the high ionic strength region.
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页码：323 / 328
页数：6
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