Premium
The phase behavior and thermal stability of blends of poly(styrene‐ co ‐methacrylic acid)/poly(styrene‐ co ‐ 4‐vinylpyridine)
Author(s) -
Benabdelghani Z.,
Etxeberria A.
Publication year - 2011
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.33587
Subject(s) - thermogravimetric analysis , methacrylic acid , miscibility , copolymer , fourier transform infrared spectroscopy , materials science , thermal stability , polymer chemistry , styrene , differential scanning calorimetry , hydrogen bond , glass transition , chemical engineering , chemistry , polymer , organic chemistry , molecule , composite material , physics , engineering , thermodynamics
Abstract The hydrogen bonding and miscibility behaviors of poly(styrene‐ co ‐methacrylic acid) (PSMA20) containing 20% of methacrylic acid with copolymers of poly(styrene‐ co ‐4‐vinylpyridine) (PS4VP) containing 5, 15, 30, 40, and 50%, respectively, of 4‐vinylpyridine were investigated by differential scanning calorimetry, thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR). It was shown that all the blends have a single glass transition over the entire composition range. The obtained T g s of PSMA20/PS4VP blends containing an excess amount of PS4VP, above 15% of 4VP in the copolymer, were found to be significantly higher than those observed for each individual component of the mixture, indicating that these blends are able to form interpolymer complexes. The FTIR study reveals presence of intermolecular hydrogen‐bonding interaction between vinylpyridine nitrogen atom and the hydroxyl of MMA group and intensifies when the amount of 4VP is increased in PS4VP copolymers. A new band characterizing these interactions at 1724 cm −1 was observed. In addition, the quantitative FTIR study carried out for PSMA20/PS4VP blends was also performed for the methacrylic acid and 4‐vinylpyridine functional groups. The TGA study confirmed that the thermal stability of these blends was clearly improved. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011