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Lower critical solution temperature of linear PNIPA obtained from a Yukawa potential of polymer chains
Author(s) -
Yan Lifeng,
Zhu Qingshi,
Kenkare Paresh U.
Publication year - 2000
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/1097-4628(20001209)78:11<1971::aid-app170>3.0.co;2-p
Subject(s) - lower critical solution temperature , yukawa potential , phase diagram , cloud point , polymer , binodal , thermodynamics , materials science , upper critical solution temperature , poly(n isopropylacrylamide) , phase boundary , polymer chemistry , phase (matter) , physics , copolymer , composite material , pulmonary surfactant , particle physics , quantum mechanics
The lower critical solution temperature (LCST) behavior of a linear poly( N ‐isopropylacrylamide) (PNIPA) in water is thought to result from the polymer–polymer attractive interaction. This polymer–polymer attraction is modeled by a temperature‐dependent Yukawa attractive potential, with Yukawa parameters determined by fitting the theoretical phase diagram for a pure Yukawa fluid to the experimental lower consolute boundary for a PNIPA–water solution. The predicted coexistence curve for the PNIPA–water mixtures in the temperature‐polymer volume fraction plane is reasonably close to the experimental cloud point data for the PNIPA–water system. © 2000 John Wiley & Sons, Inc. J Appl Polym Sci 78: 1971–1976, 2000