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Preparation of tailor‐made polystyrene nanocomposite with mixed clay‐anchored and free chains via atom transfer radical polymerization
Author(s) -
RoghaniMamaqani Hossein,
HaddadiAsl Vahid,
Najafi Mohammad,
SalamiKalajahi Mehdi,
Najafi Mohammad,
SalamiKalajahi Mehdi
Publication year - 2011
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.12395
Subject(s) - polystyrene , thermogravimetric analysis , atom transfer radical polymerization , polymer chemistry , nanocomposite , differential scanning calorimetry , gel permeation chromatography , polymerization , materials science , radical polymerization , thermal stability , chemical engineering , chemistry , polymer , organic chemistry , composite material , physics , engineering , thermodynamics
Tailor‐made polystyrene nanocomposite with mixed free and clay‐attached polystyrene chains was synthesized using atom transfer radical polymerization. Vinylbenzyl trimethylammonium chloride having a double bond, which could be incorporated into polystyrene chains by a grafting through process, was used as a nanoclay modifier. Conversion and molecular weight evaluation was carried out using gas chromatography and gel permeation chromatography, respectively. The thermogravimetric analysis results confirmed the elevated thermal stability of the nanocomposites in comparison with the neat polystyrene sample. Additionally, the T g increases by clay loading was confirmed by differential scanning calorimetry (DSC). The difference in the degradation temperature of CBr bond in attached and free polystyrene chains was well revealed in DSC thermograms. Finally, a lower clay loading resulted in an exfoliated structure as proved by X‐ray diffraction and transmission electron microscopy results. © 2010 American Institute of Chemical Engineers AIChE J, 2011