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Simple, convenient, low‐cost, and solventless greener way to pH‐responsive polymeric hydrogels: Synthesis and characterization
Author(s) -
Franklin David S.,
Guhanathan Selvam
Publication year - 2015
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/app.41921
Subject(s) - self healing hydrogels , diethylene glycol , swelling , ethylene glycol , methacrylic acid , polymer chemistry , thermal stability , chemical engineering , materials science , polymer , citric acid , triethylene glycol , chemistry , nuclear chemistry , copolymer , organic chemistry , composite material , engineering
Utilization of hydrogels in a simple, low‐cost, solventless. and greener approach toward the pH‐responsive hydrogels which comprise of citric acid (CA) with varying glycol unit viz., ethylene glycol (EG), diethylene glycol (DEG), and triethylene glycol (TEG) were prepared along with methacrylic acid (MAA). The formations of pre‐polymer and hydrogels were confirmed using 13 C‐NMR and FT‐IR spectral techniques. Thermal studies (TGA, DTA, and DSC) and morphology (SEM) of various hydrogels have been investigated. Swelling studies of hydrogels at different pH ranging from 4.0 to 10.0 have also been performed. The results of swelling studies imply that the percentage of swelling is comparatively higher at neutral pH than acidic and alkaline pH. The reciprocal relationship was identified among thermal stability and swelling behavior of hydrogels while increasing the chain length from EG to TEG. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 41921.