Les Inscriptions à la Bibliothèque sont ouvertes en
ligne via le site: https://biblio.enp.edu.dz
Les Réinscriptions se font à :
• La Bibliothèque Annexe pour les étudiants en
2ème Année CPST
• La Bibliothèque Centrale pour les étudiants en Spécialités
A partir de cette page vous pouvez :
| Retourner au premier écran avec les recherches... |
Détail de l'auteur
Auteur Jian-Bing Zeng
Documents disponibles écrits par cet auteur
Affiner la rechercheImproving flexibility of poly(l-lactide) by blending with poly(l-lactic acid) based poly(ester-urethane) / Jian-Bing Zeng in Industrial & engineering chemistry research, Vol. 50 N° 10 (Mai 2011)
in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6124–6131
Titre : Improving flexibility of poly(l-lactide) by blending with poly(l-lactic acid) based poly(ester-urethane) : morphology, mechanical properties, and crystallization behaviors Type de document : texte imprimé Auteurs : Jian-Bing Zeng, Auteur ; Yi-Dong Li, Auteur ; Yi-Song He, Auteur Année de publication : 2011 Article en page(s) : pp. 6124–6131 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Crystallization Mechanical properties Morphology Flexibility Résumé : Poly(L-lactide) (PLLA) is one of the most promising biobased and biodegradable polymers. However, the lack of toughness restricts its application considerably. In the present study, PLLA was successfully toughened by blending with a poly(lactic acid) based poly(ester-urethane) (PEU), which contained poly(butylene succinate) as a flexible segment The tensile properties and notched Izod impact strength of PLLA and toughened PLLA were investigated. The flexibility of PLLA was considerably improved after introduction of PEU by the evidence of high strain and improved impact strength. The crystallization behavior was investigated by differential scanning calorimeter (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). The glass transition temperature of toughened PLLA decreased with an increasing content of PEU, suggesting that the blends showed limited miscibility. POM observation showed that the crystallites of PEU uniformly distributed in the PLLA matrix after two-step crystallization at 120 and 60 °C. The results of WAXD suggest that the crystal structure of PLLA remained unchanged after blending with the PEU. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158911 [article] Improving flexibility of poly(l-lactide) by blending with poly(l-lactic acid) based poly(ester-urethane) : morphology, mechanical properties, and crystallization behaviors [texte imprimé] / Jian-Bing Zeng, Auteur ; Yi-Dong Li, Auteur ; Yi-Song He, Auteur . - 2011 . - pp. 6124–6131.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 10 (Mai 2011) . - pp. 6124–6131
Mots-clés : Crystallization Mechanical properties Morphology Flexibility Résumé : Poly(L-lactide) (PLLA) is one of the most promising biobased and biodegradable polymers. However, the lack of toughness restricts its application considerably. In the present study, PLLA was successfully toughened by blending with a poly(lactic acid) based poly(ester-urethane) (PEU), which contained poly(butylene succinate) as a flexible segment The tensile properties and notched Izod impact strength of PLLA and toughened PLLA were investigated. The flexibility of PLLA was considerably improved after introduction of PEU by the evidence of high strain and improved impact strength. The crystallization behavior was investigated by differential scanning calorimeter (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). The glass transition temperature of toughened PLLA decreased with an increasing content of PEU, suggesting that the blends showed limited miscibility. POM observation showed that the crystallites of PEU uniformly distributed in the PLLA matrix after two-step crystallization at 120 and 60 °C. The results of WAXD suggest that the crystal structure of PLLA remained unchanged after blending with the PEU. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24158911
in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8262-8272
Titre : Isothermal Crystallization Behavior of Biodegradable P(BS-b-PEGS) Multiblock Copolymers Type de document : texte imprimé Auteurs : Xi Lu, Auteur ; Jian-Bing Zeng, Auteur ; Cai-Li Huang, Auteur Année de publication : 2012 Article en page(s) : pp. 8262-8272 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Crystallization Résumé : Biodegradable multiblock copolymers poly(butylene succinate-b-poly(ethylene glycol) succinate) (P(BS-b-PEGS)) were prepared by direct polycondensation. The thermal and crystallization behavior of P(BS-b-PEGS) with weight fraction of PEGS component from 6 to 26 wt % were comparatively investigated with those of neat poly(butylene succinate) (PBS) by wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and polarized optical microscopy (POM). P(BS-b-PEGS) showed the same crystal structure as neat PBS, but the degree of crystallinity of copolymers was lower than that of neat PBS and decreased with increase in PEGS content The isothermal crystallization kinetics study suggests that incorporation of PEGS component did not change the crystallization mechanism, but reduced the crystallization rate of the samples, and that increasing crystallization temperature decreased the crystallization rate of all the samples. The spherulites of neat PBS and P(BS-b-PEGS) showed banded morphologies. The spherulitic growth rate of the samples also decreased with increase of PEGS content and crystallization temperature. A transition from crystallization regime II to III occurred for all the samples, and the transition shifted to lower temperatures with increase in PEGS content. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26029661 [article] Isothermal Crystallization Behavior of Biodegradable P(BS-b-PEGS) Multiblock Copolymers [texte imprimé] / Xi Lu, Auteur ; Jian-Bing Zeng, Auteur ; Cai-Li Huang, Auteur . - 2012 . - pp. 8262-8272.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 51 N° 24 (Juin 2012) . - pp. 8262-8272
Mots-clés : Crystallization Résumé : Biodegradable multiblock copolymers poly(butylene succinate-b-poly(ethylene glycol) succinate) (P(BS-b-PEGS)) were prepared by direct polycondensation. The thermal and crystallization behavior of P(BS-b-PEGS) with weight fraction of PEGS component from 6 to 26 wt % were comparatively investigated with those of neat poly(butylene succinate) (PBS) by wide-angle X-ray diffraction (WAXD), differential scanning calorimetry (DSC), and polarized optical microscopy (POM). P(BS-b-PEGS) showed the same crystal structure as neat PBS, but the degree of crystallinity of copolymers was lower than that of neat PBS and decreased with increase in PEGS content The isothermal crystallization kinetics study suggests that incorporation of PEGS component did not change the crystallization mechanism, but reduced the crystallization rate of the samples, and that increasing crystallization temperature decreased the crystallization rate of all the samples. The spherulites of neat PBS and P(BS-b-PEGS) showed banded morphologies. The spherulitic growth rate of the samples also decreased with increase of PEGS content and crystallization temperature. A transition from crystallization regime II to III occurred for all the samples, and the transition shifted to lower temperatures with increase in PEGS content. ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=26029661
in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9870–9876
Titre : Miscibility and crystallization behaviors of poly (butylene succinate) and poly (l-lactic acid) segments in their multiblock copoly (ester urethane) Type de document : texte imprimé Auteurs : Jian-Bing Zeng, Auteur ; Cong Liu, Auteur ; Fang-Yang Liu, Auteur Année de publication : 2011 Article en page(s) : pp. 9870–9876 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Crystallization Résumé : Miscibility and crystallization behaviors of poly(butylenes succinate) (PBS) and poly(l-lactic acid) (PLLA) segments in their multiblock copoly(ester urethane) were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). The single glass transition and depressed crystallization temperatures of PEUs with different compositions suggest that PBS and PLLA segments are miscible in amorphous phase of PEUs. Nonisothermal crystallization kinetics of PEUs was studied by Avrami and Mo methods; both results suggest that the crystallization rates of PEUs decreased with increasing weight fraction of PLLA segments. POM results indicate that banded spherulites were formed for PEUs when PLLA segments were introduced, and the band spacing increased with weight fraction of PLLA segments. The investigation of WAXD demonstrated the crystal structure of PEUs was the same as that of PBS, suggesting the crystallization of PEUs arose from PBS segments, and PLLA segments were unable to crystallize in PEUs. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23325810 [article] Miscibility and crystallization behaviors of poly (butylene succinate) and poly (l-lactic acid) segments in their multiblock copoly (ester urethane) [texte imprimé] / Jian-Bing Zeng, Auteur ; Cong Liu, Auteur ; Fang-Yang Liu, Auteur . - 2011 . - pp. 9870–9876.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 49 N° 20 (Octobre 2010) . - pp. 9870–9876
Mots-clés : Crystallization Résumé : Miscibility and crystallization behaviors of poly(butylenes succinate) (PBS) and poly(l-lactic acid) (PLLA) segments in their multiblock copoly(ester urethane) were investigated by differential scanning calorimetry (DSC), polarized optical microscopy (POM), and wide-angle X-ray diffraction (WAXD). The single glass transition and depressed crystallization temperatures of PEUs with different compositions suggest that PBS and PLLA segments are miscible in amorphous phase of PEUs. Nonisothermal crystallization kinetics of PEUs was studied by Avrami and Mo methods; both results suggest that the crystallization rates of PEUs decreased with increasing weight fraction of PLLA segments. POM results indicate that banded spherulites were formed for PEUs when PLLA segments were introduced, and the band spacing increased with weight fraction of PLLA segments. The investigation of WAXD demonstrated the crystal structure of PEUs was the same as that of PBS, suggesting the crystallization of PEUs arose from PBS segments, and PLLA segments were unable to crystallize in PEUs. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=23325810
in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4471–4477
Titre : Nonisothermal and isothermal cold crystallization behaviors of biodegradable poly(p-dioxanone) Type de document : texte imprimé Auteurs : Jian-Bing Zeng, Auteur ; Madhusudhan Srinivansan, Auteur ; Shao-Long Li, Auteur Année de publication : 2011 Article en page(s) : pp. 4471–4477 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Nonisothermal Isothermal Crystallization Biodegradable Résumé : Nonisothermal and isothermal cold crystallization behaviors of poly(p-dioxanone) (PPDO) were investigated by differential scanning calorimetry (DSC). There were two crystallization exotherms—a major exotherm between 25 °C and 50 °C and a minor one almost unchanged at 77 °C with various heating rates—in the heating scans of PPDO during nonisothermal cold crystallization. Temperature-modulated differential scanning calorimetry (TMDSC) revealed the major crystallization exotherm in the low-temperature range to be the real cold crystallization peak, and the minor one in the high-temperature range to be the melt-recrystallization peak of crystals with lower thermal stability. Several methods, including the Avrami, Tobin, and Ozawa equations, were employed to analyze the nonisothermal cold crystallization kinetics of PPDO. The efficiencies of the Avrami and Tobin methods were compared, and the results suggest that the Avrami equation is more suitable for describing nonisothermal cold crystallization kinetics of PPDO. The activation energy for nonisothermal cold crystallization of PPDO was calculated to be 35.27 kJ/mol, using the Kissinger method. In addition, the Avrami equation was also used to describe the isothermal cold crystallization kinetics of PPDO. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102299y [article] Nonisothermal and isothermal cold crystallization behaviors of biodegradable poly(p-dioxanone) [texte imprimé] / Jian-Bing Zeng, Auteur ; Madhusudhan Srinivansan, Auteur ; Shao-Long Li, Auteur . - 2011 . - pp. 4471–4477.
Chimie industrielle
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 50 N° 8 (Avril 2011) . - pp. 4471–4477
Mots-clés : Nonisothermal Isothermal Crystallization Biodegradable Résumé : Nonisothermal and isothermal cold crystallization behaviors of poly(p-dioxanone) (PPDO) were investigated by differential scanning calorimetry (DSC). There were two crystallization exotherms—a major exotherm between 25 °C and 50 °C and a minor one almost unchanged at 77 °C with various heating rates—in the heating scans of PPDO during nonisothermal cold crystallization. Temperature-modulated differential scanning calorimetry (TMDSC) revealed the major crystallization exotherm in the low-temperature range to be the real cold crystallization peak, and the minor one in the high-temperature range to be the melt-recrystallization peak of crystals with lower thermal stability. Several methods, including the Avrami, Tobin, and Ozawa equations, were employed to analyze the nonisothermal cold crystallization kinetics of PPDO. The efficiencies of the Avrami and Tobin methods were compared, and the results suggest that the Avrami equation is more suitable for describing nonisothermal cold crystallization kinetics of PPDO. The activation energy for nonisothermal cold crystallization of PPDO was calculated to be 35.27 kJ/mol, using the Kissinger method. In addition, the Avrami equation was also used to describe the isothermal cold crystallization kinetics of PPDO. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie102299y
in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8233–8238
Titre : Novel Biodegradable Poly(1,4-dioxan-2-one) Grafted Soy Protein Copolymer: Synthesis and Characterization Type de document : texte imprimé Auteurs : Yi-Dong Li, Auteur ; Si - Chong Chen, Auteur ; Jian-Bing Zeng, Auteur ; Yu-Zhong Wang, Auteur Année de publication : 2008 Article en page(s) : p. 8233–8238 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : BiodegradableNuclear magnetic resonance (NMR) Résumé : A novel biodegradable copolymer, poly(1,4-dioxan-2-one) (PPDO) grafted soy protein isolate (SPI) (SPI-g-PPDO), was investigated. The ring-opening graft copolymerization of SPI-g-PPDO was carried out with stannous octoate as a co-initiator/catalyst in the presence of azeotropic solvent at 80 °C. The molecular structure of SPI-g-PPDO was characterized by Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR). The results suggested that the content and length of PPDO graft chains of the copolymer increased with the increase of monomer (1,4-dioxan-2-one, PDO) content. Moreover, the results of differential scanning calorimetry (DSC) showed that the copolymer has a definite glass transition temperature and melting point, meaning that the copolymer can be melt-processed. In addition, the copolymers could form crystals after the grafting polymerization. The crystallization ability increases with the increase of graft chain length. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800994s [article] Novel Biodegradable Poly(1,4-dioxan-2-one) Grafted Soy Protein Copolymer: Synthesis and Characterization [texte imprimé] / Yi-Dong Li, Auteur ; Si - Chong Chen, Auteur ; Jian-Bing Zeng, Auteur ; Yu-Zhong Wang, Auteur . - 2008 . - p. 8233–8238.
Chemical engineering
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 47 n°21 (Novembre 2008) . - p. 8233–8238
Mots-clés : BiodegradableNuclear magnetic resonance (NMR) Résumé : A novel biodegradable copolymer, poly(1,4-dioxan-2-one) (PPDO) grafted soy protein isolate (SPI) (SPI-g-PPDO), was investigated. The ring-opening graft copolymerization of SPI-g-PPDO was carried out with stannous octoate as a co-initiator/catalyst in the presence of azeotropic solvent at 80 °C. The molecular structure of SPI-g-PPDO was characterized by Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance (NMR). The results suggested that the content and length of PPDO graft chains of the copolymer increased with the increase of monomer (1,4-dioxan-2-one, PDO) content. Moreover, the results of differential scanning calorimetry (DSC) showed that the copolymer has a definite glass transition temperature and melting point, meaning that the copolymer can be melt-processed. In addition, the copolymers could form crystals after the grafting polymerization. The crystallization ability increases with the increase of graft chain length. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie800994s
Permalink
Permalink
Permalink
Permalink
