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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]  in Industrial & 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

Improvement of the compatibilization of high - impact polystyrene / magnesium hydroxide composites with partially sulfonated polystyrene as macromolecular compatibilizers / Zhen Yang in Industrial & engineering chemistry research, Vol. 51 N° 27 (Juillet 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9204-9212 Titre : Improvement of the compatibilization of high - impact polystyrene / magnesium hydroxide composites with partially sulfonated polystyrene as macromolecular compatibilizers Type de document : texte imprimé Auteurs : Zhen Yang, Auteur ; Chengang Zhou, Auteur ; Hu Yang, Auteur Année de publication : 2012 Article en page(s) : pp. 9204-9212 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Composite  material Résumé : The partially sulfonated polystyrene (SPS) is a very simple and easily prepared material. In this work, SPS was used for the first time as a macromolecular compatibilizer to improve the compatibilization of high-impact polystyrene (HIPS)/ magnesium hydroxide (MH) composites by self-compatibilization technology. The compatibilization effects of SPS were systematically studied by mechanical performance tests, limiting oxygen index (LOI) measurements, thermal stability analyses, and scanning electron microscopy (SEM) observation. On the basis of these experimental results, SPS was proven efficient to enhance the compatibilization of the HIPS/MH composites due to the coupling effects. The sulfonic groups of SPS could anchor onto the surface of MH particles through interaction with hydroxyl groups of MH. Meanwhile, the long alkyl chains of SPS readily entwisted with HIPS matrix. Besides, the effects of both the sulfonation degree and the content of SPS on the performance of HIPS/MH composites were investigated also. In order to obtain the best overall final performance, both of the aforementioned parameters should be controlled in a suitable range. The optimal condition in this study was 3―4.5 wt % of SPS with sulfonation degree of 24.8―35.5% in the composites. Furthermore, compared with styrene-butadiene-styrene block copolymer (SBS), a commercial compatibilizer widely used in HIPS materials, SPS exhibited better compatibilization effects but lower cost. Therefore, it could be concluded that SPS was applicable as a cost-effective compatibilizer in HIPS/MH composites. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132255 [article] Improvement of the compatibilization of high - impact polystyrene / magnesium hydroxide composites with partially sulfonated polystyrene as macromolecular compatibilizers [texte imprimé] / Zhen Yang, Auteur ; Chengang Zhou, Auteur ; Hu Yang, Auteur . - 2012 . - pp. 9204-9212. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 27 (Juillet 2012) . - pp. 9204-9212 Mots-clés : Composite  material Résumé : The partially sulfonated polystyrene (SPS) is a very simple and easily prepared material. In this work, SPS was used for the first time as a macromolecular compatibilizer to improve the compatibilization of high-impact polystyrene (HIPS)/ magnesium hydroxide (MH) composites by self-compatibilization technology. The compatibilization effects of SPS were systematically studied by mechanical performance tests, limiting oxygen index (LOI) measurements, thermal stability analyses, and scanning electron microscopy (SEM) observation. On the basis of these experimental results, SPS was proven efficient to enhance the compatibilization of the HIPS/MH composites due to the coupling effects. The sulfonic groups of SPS could anchor onto the surface of MH particles through interaction with hydroxyl groups of MH. Meanwhile, the long alkyl chains of SPS readily entwisted with HIPS matrix. Besides, the effects of both the sulfonation degree and the content of SPS on the performance of HIPS/MH composites were investigated also. In order to obtain the best overall final performance, both of the aforementioned parameters should be controlled in a suitable range. The optimal condition in this study was 3―4.5 wt % of SPS with sulfonation degree of 24.8―35.5% in the composites. Furthermore, compared with styrene-butadiene-styrene block copolymer (SBS), a commercial compatibilizer widely used in HIPS materials, SPS exhibited better compatibilization effects but lower cost. Therefore, it could be concluded that SPS was applicable as a cost-effective compatibilizer in HIPS/MH composites. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26132255