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Study of the compatibility of poly[(styrene)‐ co ‐ (4‐vinylbenzoic acid)] with poly[(ethyl methacrylate)‐ co ‐(4‐vinylpyridine)] blends
Author(s) -
Ourdani Samia,
Amrani Farouk
Publication year - 2000
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/1521-3935(20001101)201:17<2458::aid-macp2458>3.0.co;2-f
Subject(s) - differential scanning calorimetry , copolymer , glass transition , styrene , polymer chemistry , methacrylate , fourier transform infrared spectroscopy , miscibility , infrared spectroscopy , hydrogen bond , materials science , chemistry , polymer , chemical engineering , organic chemistry , molecule , thermodynamics , physics , engineering
Binary systems of poly[(ethyl methacrylate)‐ co ‐(4‐vinylpyridine)] (12.5 mol‐%), PEMAVP‐13, with poly[(styrene)‐ co ‐4‐(vinylbenzoic acid)] (3.5, 6.5 and 7.4 mol‐%), PSVBA, are investigated by differential scanning calorimetry and Fourier transform infrared spectroscopy. The calorimetric results show that PEMAVP‐13 is miscible with the three PSVBA copolymers in the studied proportions of 2 : 1, 1 : 1 and 1 : 2 by weight. The thermogram of each mixture shows a single composition‐dependent glass transition temperature, T g . The experimental value of T g for each blend is higher than the calculated weight average T g of its components. Such a positive deviation implies the presence of strong specific interactions within these blends. A comparison of the determined Kwei q‐value reveals an increase of the specific interactions with acidic units in PSVBA composition. Fourier transform infrared measurements in the carbonyl stretching vibration region show the occurrence of hydrogen bonding involving the carboxylic acid groups of PSVBA with the carbonyl groups of PEMAVP‐13.