Effects of macromolecular compatibilizers containing epoxy groups on the properties of linear low - density polyethylene / magnesium hydroxide composites / Zhen Yang in Industrial & engineering chemistry research, Vol. 49 N° 14 (Juillet 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp.6291–6301 Titre : Effects of macromolecular compatibilizers containing epoxy groups on the properties of linear low - density polyethylene / magnesium hydroxide composites Type de document : texte imprimé Auteurs : Zhen Yang, Auteur ; Chengang Zhou, Auteur ; Jun Cai, Auteur Année de publication : 2010 Article en page(s) : pp.6291–6301 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Macromolecular Hydroxide Résumé : The effects of two kinds of macromolecular compatibilizers, poly(ethylene-co-glycidyl methacrylate) (PE-co-PGMA) and poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate) (PE-co-PMA-co-PGMA), both containing epoxy groups, on the properties of linear low-density polyethylene (LLDPE)/magnesium hydroxide (MH) composites were studied in this work. On the basis of the experimental results from the mechanical test, thermal stability analysis, and scanning electron microscopy (SEM) observation, both PE-co-PGMA and PE-co-PMA-co-PGMA were demonstrated to be efficient compatibilizers. In order to investigate the compatibilization mechanism, further characterization by particle size and a particle size distribution analyzer, SEM-energy dispersive X-ray spectroscopy (EDX), and attenuated total reflection-Fourier transform infrared (ATR-FTIR) were carried out, respectively. It was found that the epoxy groups on the compatibilizers played a very important role in modification of the LLDPE/MH system. The compatibilizers conglutinated tightly on the surface of MH though ring-open reactions between the epoxy group and hydroxyl of MH; furthermore, the long organic chains of compatibilizers entwisted with LLDPE through van der Waals force. The fracture morphology observation of LLDPE/MH composites also showed that MH particles were closely united with polymer matrix through the compatibilizers. Therefore, the compatibility between MH and LLDPE was enhanced, which improved the final performances of the LLDPE/MH composites further. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100610j [article] Effects of macromolecular compatibilizers containing epoxy groups on the properties of linear low - density polyethylene / magnesium hydroxide composites [texte imprimé] / Zhen Yang, Auteur ; Chengang Zhou, Auteur ; Jun Cai, Auteur . - 2010 . - pp.6291–6301. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 14 (Juillet 2010) . - pp.6291–6301 Mots-clés : Macromolecular Hydroxide Résumé : The effects of two kinds of macromolecular compatibilizers, poly(ethylene-co-glycidyl methacrylate) (PE-co-PGMA) and poly(ethylene-co-methyl acrylate-co-glycidyl methacrylate) (PE-co-PMA-co-PGMA), both containing epoxy groups, on the properties of linear low-density polyethylene (LLDPE)/magnesium hydroxide (MH) composites were studied in this work. On the basis of the experimental results from the mechanical test, thermal stability analysis, and scanning electron microscopy (SEM) observation, both PE-co-PGMA and PE-co-PMA-co-PGMA were demonstrated to be efficient compatibilizers. In order to investigate the compatibilization mechanism, further characterization by particle size and a particle size distribution analyzer, SEM-energy dispersive X-ray spectroscopy (EDX), and attenuated total reflection-Fourier transform infrared (ATR-FTIR) were carried out, respectively. It was found that the epoxy groups on the compatibilizers played a very important role in modification of the LLDPE/MH system. The compatibilizers conglutinated tightly on the surface of MH though ring-open reactions between the epoxy group and hydroxyl of MH; furthermore, the long organic chains of compatibilizers entwisted with LLDPE through van der Waals force. The fracture morphology observation of LLDPE/MH composites also showed that MH particles were closely united with polymer matrix through the compatibilizers. Therefore, the compatibility between MH and LLDPE was enhanced, which improved the final performances of the LLDPE/MH composites further. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100610j

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Synthesis, characterization, and activity evaluation of DyVO4/g-C3N4 composites under visible-light irradiation / Yiming He in Industrial & engineering chemistry research, Vol. 51 N° 45 (Novembre 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14729-14737 Titre : Synthesis, characterization, and activity evaluation of DyVO4/g-C3N4 composites under visible-light irradiation Type de document : texte imprimé Auteurs : Yiming He, Auteur ; Jun Cai, Auteur ; Tingting Li, Auteur Année de publication : 2013 Article en page(s) : pp. 14729-14737 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Visible radiation Composite material Résumé : DyVO4/graphitic carbon nitride (DyVO4/g-C3N4) composite photocatalyst with visible-light response was prepared by a milling and heating treatment method. The synthesized powder was characterized by X-ray diffraction, thermogravimetry/differential thermal analysis, N2 adsorption, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV―vis diffuse reflection spectroscopy. The activity of composite photocatalyst DyVO4/g-C3N4 for photodegradation of rhodamine B is much higher than that of either single-phase g-C3N4 or DyVO4. The obviously increased performance of DyVO4/g-C3N4 is mainly ascribed to the electron-hole separation enhancement at the interface of the two semiconductors, as proven by photoluminescence spectroscopy and photocurrent measurement. In addition, it is found that holes and •O2― are the main active species in the photocatalytic oxidation of RhB solution in the presence of DyVO4/g-C3N4 composite. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620387 [article] Synthesis, characterization, and activity evaluation of DyVO4/g-C3N4 composites under visible-light irradiation [texte imprimé] / Yiming He, Auteur ; Jun Cai, Auteur ; Tingting Li, Auteur . - 2013 . - pp. 14729-14737. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 45 (Novembre 2012) . - pp. 14729-14737 Mots-clés : Visible radiation Composite material Résumé : DyVO4/graphitic carbon nitride (DyVO4/g-C3N4) composite photocatalyst with visible-light response was prepared by a milling and heating treatment method. The synthesized powder was characterized by X-ray diffraction, thermogravimetry/differential thermal analysis, N2 adsorption, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy, transmission electron microscopy, and UV―vis diffuse reflection spectroscopy. The activity of composite photocatalyst DyVO4/g-C3N4 for photodegradation of rhodamine B is much higher than that of either single-phase g-C3N4 or DyVO4. The obviously increased performance of DyVO4/g-C3N4 is mainly ascribed to the electron-hole separation enhancement at the interface of the two semiconductors, as proven by photoluminescence spectroscopy and photocurrent measurement. In addition, it is found that holes and •O2― are the main active species in the photocatalytic oxidation of RhB solution in the presence of DyVO4/g-C3N4 composite. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26620387

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