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Preparation of poly(p-dioxanone)/sepiolite nanocomposites with excellent strength/toughness balance via surface-initiated polymerization / Zhi-Cheng Qiu in Industrial & engineering chemistry research, Vol. 50 N° 17 (Septembre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10006-10016 Titre : Preparation of poly(p-dioxanone)/sepiolite nanocomposites with excellent strength/toughness balance via surface-initiated polymerization Type de document : texte imprimé Auteurs : Zhi-Cheng Qiu, Auteur ; Jing-Jing Zhang, Auteur ; Ying Niu, Auteur Année de publication : 2011 Article en page(s) : pp. 10006-10016 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Polymerization  Strength  Nanocomposite  Preparation Résumé : Novel nanocomposites based on aliphatic poly( ester-ether) [poly(p-dioxanone), PPDO] and fibrous clay (sepiolite) were successfully prepared by surface-initiated polymerization ofp-dioxanone (PDO) in the presence of organo-modified sepiolite (OSEP). The existence of OSEP-grafted PPDO in nanocomposites, generated via surface-initiated polymerization from the hydroxyl group-abundant OSEP surface, greatly contributes to improving the performance of these nanocomposites. The dispersion uniformity of OSEP nanofibers in PPDO matrix was confirmed by scanning electron microscope (SEM) observations. Crystallization rate increased with increasing OSEP loading. Surprisingly, only OSEP nanofibers bundles acted as heterogeneous nucleating agents during the latter stage of PPDO crystallization. The incorporation of OSEP significantly enhanced the modulus and viscosity of nanocomposites, whereas nanocomposites still presented liquid-like behavior as neat PPDO. The exciting aspect of this research is that nanocomposites were reinforced and toughened by the addition of OSEP nanofibers. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483644 [article] Preparation of poly(p-dioxanone)/sepiolite nanocomposites with excellent strength/toughness balance via surface-initiated polymerization [texte imprimé] / Zhi-Cheng Qiu, Auteur ; Jing-Jing Zhang, Auteur ; Ying Niu, Auteur . - 2011 . - pp. 10006-10016. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 17 (Septembre 2011) . - pp. 10006-10016 Mots-clés : Polymerization  Strength  Nanocomposite  Preparation Résumé : Novel nanocomposites based on aliphatic poly( ester-ether) [poly(p-dioxanone), PPDO] and fibrous clay (sepiolite) were successfully prepared by surface-initiated polymerization ofp-dioxanone (PDO) in the presence of organo-modified sepiolite (OSEP). The existence of OSEP-grafted PPDO in nanocomposites, generated via surface-initiated polymerization from the hydroxyl group-abundant OSEP surface, greatly contributes to improving the performance of these nanocomposites. The dispersion uniformity of OSEP nanofibers in PPDO matrix was confirmed by scanning electron microscope (SEM) observations. Crystallization rate increased with increasing OSEP loading. Surprisingly, only OSEP nanofibers bundles acted as heterogeneous nucleating agents during the latter stage of PPDO crystallization. The incorporation of OSEP significantly enhanced the modulus and viscosity of nanocomposites, whereas nanocomposites still presented liquid-like behavior as neat PPDO. The exciting aspect of this research is that nanocomposites were reinforced and toughened by the addition of OSEP nanofibers. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24483644