Health & Environmental Research Online (HERO)


Print Feedback Export to File
6636324 
Journal Article 
Study of the compatibility of poly[(styrene)-co(4-vinylbenzoic acid)] with poly[(ethyl methacrylate)co-(4-vinylpyridine)] blends 
Ourdani, S; Amrani, F; , 
2000 
1 
Macromolecular Chemistry and Physics
ISSN: 1022-1352 
WILEY-V C H VERLAG GMBH 
BERLIN 
201 
17 
2458-2463 
English 
WOS:000165954600034 
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.