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Premium Interpenetrating polymer networks based on poly(acrylic acid) and gelatin. I: Swelling and thermal behavior
Burugapalli Krishna,
Bhatia Dhiraj,
Koul Veena,
Choudhary Veena
Publication year2001
Publication title
journal of applied polymer science
Resource typeJournals
PublisherJohn Wiley & Sons
Abstract This article describes the synthesis of full and semi‐interpenetrating polymer networks (IPNs) based on poly(acrylic acid) and gelatin as polymers 1 and 2, which were crosslinked sequentially using N,N ′‐methylene bisacrylamide (B Am ) and glutaraldehyde, respectively. Various samples were prepared by taking varying amounts of acrylic acid and gelatin in the initial feed. Sequential IPNs were prepared by first polymerizing and crosslinking acrylic acid in the presence of gelatin using redox initiators (ammonium persulphate and sodium metabisulphite) and B Am as a crosslinking agent. Gelatin present in the firm gels was then crosslinked using 4% glutaraldehyde. Characterization of these gels was done by measuring their swelling behavior as a function of pH, temperature, and time. Percent swelling increased with increasing amounts of acrylic acid. The swelling ratio was also determined in the pH range of 1 to 12. Acid/alkali or buffers were used for maintaining pH. A significant increase in the percent swelling was observed when pH of distilled water was above 10. On the other hand, in the case of buffer, the swelling ratio increased with increasing the pH, and a maxima was observed at pH 8.4. A further increase in pH resulted in a decrease in the swelling ratio. Thermal and morphological characterization was done using thermogravimetric analyzer and scanning electron microscopy, respectively. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 217–227, 2001
Subject(s)acrylic acid , acrylic polymer , chemical engineering , chemistry , composite material , copolymer , engineering , gelatin , interpenetrating polymer network , materials science , monomer , organic chemistry , physics , polymer , polymer chemistry , polymer science , swelling , thermal , thermodynamics
SCImago Journal Rank0.575

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