Two-stage in situ intercalation polymerization of acrylic copolymer/montmorillonite nanocomposites / Ming Gao in Industrial & engineering chemistry research, Vol. 50 N° 13 (Juillet 2011)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7784–7790 Titre : Two-stage in situ intercalation polymerization of acrylic copolymer/montmorillonite nanocomposites Type de document : texte imprimé Auteurs : Ming Gao, Auteur ; Dong-Liang Zhou, Auteur ; Xiao Hu, Auteur Année de publication : 2011 Article en page(s) : pp. 7784–7790 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nanocomposite Montmorillonite Polymerization In situ Résumé : An amphiphilic acrylic copolymer/montmorillonite nanocomposite was synthesized by way of a two-stage radical copolymerization of emulsion intercalation and solution intercalation, using acrylates, methacrylic acid, and acrylamide as monomers. The water-based product was designed with a structure of a hydrophobic copolymer dispersed in an aqueous copolymer solution to meet the needs of warp sizing agents on adhesiveness to hydrophobic and/or hydrophilic fibers, appropriate glass transition temperature, as well as water-solubility. XRD patterns and TEM observation for the product films showed an exfoliated structure of montmorillonite (MMT) in the part of soluble acrylic copolymer as the MMT content equal to or less than 7%, while in the part of emulsion copolymer alone or the product as a whole, the MMT showed an intercalated structure. Determination of DSC indicated that chemical bondings occurred between the hydrophobic and hydrophilic components, which guaranteed storage stability of the system and water-solubility of the sizing film, and that there were three Tgs corresponding to the emulsion copolymer, solution copolymer and the interfacial copolymer between the two phases. All of the Tgs increased with increasing content of the MMT in the composites. The elongation at break of the composite films increased with increasing MMT contents up to 3 wt % and then dropped down, and the tensile strength and abrasive resistance of the acrylic copolymer increased with content of the MMT. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332100 [article] Two-stage in situ intercalation polymerization of acrylic copolymer/montmorillonite nanocomposites [texte imprimé] / Ming Gao, Auteur ; Dong-Liang Zhou, Auteur ; Xiao Hu, Auteur . - 2011 . - pp. 7784–7790. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 13 (Juillet 2011) . - pp. 7784–7790 Mots-clés : Nanocomposite Montmorillonite Polymerization In situ Résumé : An amphiphilic acrylic copolymer/montmorillonite nanocomposite was synthesized by way of a two-stage radical copolymerization of emulsion intercalation and solution intercalation, using acrylates, methacrylic acid, and acrylamide as monomers. The water-based product was designed with a structure of a hydrophobic copolymer dispersed in an aqueous copolymer solution to meet the needs of warp sizing agents on adhesiveness to hydrophobic and/or hydrophilic fibers, appropriate glass transition temperature, as well as water-solubility. XRD patterns and TEM observation for the product films showed an exfoliated structure of montmorillonite (MMT) in the part of soluble acrylic copolymer as the MMT content equal to or less than 7%, while in the part of emulsion copolymer alone or the product as a whole, the MMT showed an intercalated structure. Determination of DSC indicated that chemical bondings occurred between the hydrophobic and hydrophilic components, which guaranteed storage stability of the system and water-solubility of the sizing film, and that there were three Tgs corresponding to the emulsion copolymer, solution copolymer and the interfacial copolymer between the two phases. All of the Tgs increased with increasing content of the MMT in the composites. The elongation at break of the composite films increased with increasing MMT contents up to 3 wt % and then dropped down, and the tensile strength and abrasive resistance of the acrylic copolymer increased with content of the MMT. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24332100

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