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Binary blends based on poly( N ‐isopropylacrylamide): Miscibility studies with PVA, PVP, and PAA
Author(s) -
Mano Valdir,
Ribeiro E Silva Maria Elisa Scarpelli,
Barbani Niccoletta,
Giusti Paolo
Publication year - 2004
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.20027
Subject(s) - miscibility , differential scanning calorimetry , materials science , vinyl alcohol , polymer chemistry , poly(n isopropylacrylamide) , acrylic acid , aqueous solution , chemical engineering , copolymer , polymer blend , scanning electron microscope , casting , polymer , composite material , chemistry , organic chemistry , thermodynamics , physics , engineering
Blends of poly(vinyl alcohol) (PVA), poly(acrylic acid), (PAA), and poly(vinyl pyrrolidone) (PVP), with poly( N ‐isopropylacrylamide) (PNIPAM), were prepared by casting from aqueous solutions. Mechanical properties of PNIPAM/PVA blends were analyzed by stress–strain tests. Differential scanning calorimetry (DSC) and scanning electron microscopy (SEM) were employed to analyze the miscibility between the polymeric pairs. The results revealed that PNIPAM is not miscible with PVA and PVP in the whole range of composition. On the other hand, PNIPAM interacts strongly with PAA forming interpolymer complex due to the formation of cooperative hydrogen bonds. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 92: 743–748, 2004