pH/Temperature dependent phase transition of an interpenetrating polymer network: Anomalous swelling behavior above lower critical solution temperature

Anomalous swelling behavior has been observed in interpenetrating polymer networks (IPNs) gel composed of poly ( N-isopropylacrylamide) (PNIPAM) and poly(acrylic acid) (PAA). Calorimetric endotherms, FT-IR (Fourier transform-infrared) spectra and compression modulus show that the molecular interacti...

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Bibliographic Details
Published inEuropean polymer journal Vol. 34; no. 11; pp. 1675 - 1681
Main Authors Shin, Byung Chunl, Jhon, Mu Shik, Lee, Hai Bang, Yuk, Soon Hong
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.11.1998
Elsevier
Subjects
Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
Swelling
Mechanical properties
Temperature effect
Hydrophobic interaction
Experimental study
Acrylamide derivative polymer
Interpenetrating polymer network
Colloidal gel
Polyelectrolyte
Medium effect
Acrylic acid polymer
pH
Bulk modulus
Hydrogen bond
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Summary:Anomalous swelling behavior has been observed in interpenetrating polymer networks (IPNs) gel composed of poly ( N-isopropylacrylamide) (PNIPAM) and poly(acrylic acid) (PAA). Calorimetric endotherms, FT-IR (Fourier transform-infrared) spectra and compression modulus show that the molecular interaction such as hydrogen bond and hydrophobic interaction serve as a driving force which takes place with an anomalous swelling behavior.
ISSN:0014-3057
1873-1945
DOI:10.1016/S0014-3057(98)00025-1