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Effects of hydrophilic monomer types on poly(styrene‐acrylate)/montmorillonite nanocomposites made by in‐site emulsion polymerization
Author(s) -
Zhang FaAi,
Chen Lin,
Ma JiQuan
Publication year - 2009
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.1422
Subject(s) - materials science , monomer , emulsion polymerization , montmorillonite , acrylate , styrene , polymer chemistry , emulsion , nanocomposite , polymerization , butyl acrylate , chemical engineering , polymer science , polymer , copolymer , composite material , engineering
Organic modified montmorillonite (OMMT) was made of pristine montmorillonite (MMT) treated with cetyl trimethylammonium bromide (CTAB). Two kinds of nanocomposites, poly(styrene‐acrylate)/MMT (P(S‐A)/MMT) and poly (styrene‐acrylate)/OMMT (P(S‐A)/OMMT) were prepared from styrene (St), hydrophilic acrylate monomer, and MMT (or OMMT) by in‐site emulsion polymerization. Effects of different monomers, β ‐hydroxyethyl methacrylate (HEMA), acrylic acid (AA), methacryclic acid (MAA) on the thermal stability of the two nanocomposites were investigated by differential scanning calorimetry (DSC) and thermogravimetric analysis (TG). The structures of the nanocomposites were characterized by infrared spectroscopy (IR) and X‐ray diffraction (XRD). The morphology of the nanocomposite was observed by transmission electron microscope (TEM). The results showed that the thermal stabilities of the two composites were enhanced by the addition of HEMA, AA, or MAA. The P(S‐A)/OMMT nanocomposite showed higher thermal stability than that of the P(S‐A)/MMT nanocomposite. In particular, HEMA improved the thermal stability of the P(S‐A)/OMMT nanocomposite, which is more efficient than methacrylic acid (MA) and AA. Copyright © 2009 John Wiley & Sons, Ltd.