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Carbonization of poly (methyl methacrylate) by incorporating hydroxyapatite nanorods during thermal degradation / Yangyang Dong in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 10903-10909 Titre : Carbonization of poly (methyl methacrylate) by incorporating hydroxyapatite nanorods during thermal degradation Type de document : texte imprimé Auteurs : Yangyang Dong, Auteur ; Zhou Gui, Auteur ; Saihua Jiang, Auteur Année de publication : 2011 Article en page(s) : pp. 10903-10909 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Thermal  degradation  Hydroxyapatite  Carbonization Résumé : Poly(methyl methacrylate)/hydroxyapatite nanorod (PMMA/HANR) composites were synthesized by in situ polymerization of methyl methacrylate (MMA) in a suspension of HANRs in ethanol. It was found that the thermal properties of the composites were improved effectively by increasing the inorganic HANRloading, especially when the amount of loaded HANRs was high enough (≥9.3 wt %). The experimental results showed that graphitized char was generated in the residue after thermal degradation of the composites in air at 550 °C for 0.5 h. The residues of the composites with higher inorganic loadings formed a compact and continuous network structure made up of inorganic fillers and carbonaceous char. This indicates that the carbonization behavior of HANRs in PMMA matrix leads to improvement of the thermal properties of the polymer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573283 [article] Carbonization of poly (methyl methacrylate) by incorporating hydroxyapatite nanorods during thermal degradation [texte imprimé] / Yangyang Dong, Auteur ; Zhou Gui, Auteur ; Saihua Jiang, Auteur . - 2011 . - pp. 10903-10909. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp. 10903-10909 Mots-clés : Thermal  degradation  Hydroxyapatite  Carbonization Résumé : Poly(methyl methacrylate)/hydroxyapatite nanorod (PMMA/HANR) composites were synthesized by in situ polymerization of methyl methacrylate (MMA) in a suspension of HANRs in ethanol. It was found that the thermal properties of the composites were improved effectively by increasing the inorganic HANRloading, especially when the amount of loaded HANRs was high enough (≥9.3 wt %). The experimental results showed that graphitized char was generated in the residue after thermal degradation of the composites in air at 550 °C for 0.5 h. The residues of the composites with higher inorganic loadings formed a compact and continuous network structure made up of inorganic fillers and carbonaceous char. This indicates that the carbonization behavior of HANRs in PMMA matrix leads to improvement of the thermal properties of the polymer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24573283

Enhanced thermal properties and flame retardancy of a novel transparent poly (methyl methacrylate) - based hybrid prepared by the sol – gel method / Saihua Jiang in Industrial & engineering chemistry research, Vol. 51 N° 28 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9447-9455 Titre : Enhanced thermal properties and flame retardancy of a novel transparent poly (methyl methacrylate) - based hybrid prepared by the sol – gel method Type de document : texte imprimé Auteurs : Saihua Jiang, Auteur ; Yuan Hu, Auteur ; Zhou Gui, Auteur Année de publication : 2012 Article en page(s) : pp. 9447-9455 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Flame  Thermal  properties Résumé : A novel monomer, poly(ethylene glycol) monoacrylate aminopropyltriethoxysilane phenyl phosphate (SNP), containing phosphorus, nitrogen, and silicon was synthesized and then incorporated into a poly(methyl methacrylate) (PMMA) matrix through copolymerization and the sol-gel method to produce organic―inorganic hybrids. The chemical structure of SNP was characterized by FTIR, 1H NMR, 29Si NMR, and 31P NMR spectroscopies. The 29Si MAS NMR results for the hybrid materials suggested the formation of cross-linked networks in the hybrids. A morphological study showed that the inorganic particles were well distributed in the PMMA matrix. The hybrids retained a high transparency and exhibited a significant improvement in glass transition temperature, thermal stability, hardness, and flame retardancy upon the incorporation of SNP into the PMMA matrix. The network structure, homogeneous distribution, and char formation during degradation were proposed as three key reasons for the improved properties. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26163280 [article] Enhanced thermal properties and flame retardancy of a novel transparent poly (methyl methacrylate) - based hybrid prepared by the sol – gel method [texte imprimé] / Saihua Jiang, Auteur ; Yuan Hu, Auteur ; Zhou Gui, Auteur . - 2012 . - pp. 9447-9455. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 28 (Juillet 2012) . - pp. 9447-9455 Mots-clés : Flame  Thermal  properties Résumé : A novel monomer, poly(ethylene glycol) monoacrylate aminopropyltriethoxysilane phenyl phosphate (SNP), containing phosphorus, nitrogen, and silicon was synthesized and then incorporated into a poly(methyl methacrylate) (PMMA) matrix through copolymerization and the sol-gel method to produce organic―inorganic hybrids. The chemical structure of SNP was characterized by FTIR, 1H NMR, 29Si NMR, and 31P NMR spectroscopies. The 29Si MAS NMR results for the hybrid materials suggested the formation of cross-linked networks in the hybrids. A morphological study showed that the inorganic particles were well distributed in the PMMA matrix. The hybrids retained a high transparency and exhibited a significant improvement in glass transition temperature, thermal stability, hardness, and flame retardancy upon the incorporation of SNP into the PMMA matrix. The network structure, homogeneous distribution, and char formation during degradation were proposed as three key reasons for the improved properties. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26163280