Documents disponibles écrits par cet auteur

Novel Biodegradable Poly(1,4-dioxan-2-one) Grafted Soy Protein Copolymer: Synthesis and Characterization / Yi-Dong Li in Industrial & engineering chemistry research, Vol. 47 n°21 (Novembre 2008) 

Public ISBD [article]  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

Preparation and rheological behaviors of thermoplastic poly(vinyl alcohol) modified by lactic acid / Jing Ding in Industrial & engineering chemistry research, Vol. 50 N° 15 (Août 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9123-9130 Titre : Preparation and rheological behaviors of thermoplastic poly(vinyl alcohol) modified by lactic acid Type de document : texte imprimé Auteurs : Jing Ding, Auteur ; Si - Chong Chen, Auteur ; Xiu - Li Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 9123-9130 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Preparation  Thermoplastic Résumé : A thermoplastic modified poly(vinyl alcohol) (PVA-g-LA) with improved melt processing property was prepared by melt polycondensation of PVA with lactic acid. Rheological behaviors of PVA-g-LA copolymers were investigated using a high-pressure capillary rheometer. The influences of the content of oligo-poly (lactic add) graft chains and content of PVA-0588 on the rheological properties of PVA-g-LA copolymers were researched. The rheological parameters including non-Newtonian index and the viscous flow activation energy were analyzed and evaluated. As predicted, the PVA-g-LA samples exhibited noticeable shear thinning behavior. The apparent viscosity, the viscous flow activation energy, and the non-Newtonian index of PVA-g-LA showed obvious correlation with the PLA grafting chain content and PVA-0588 content at a constant temperature and shear rate. Both the increase of the content of oligo-PLA graft chains and content of PVA-0588 with PVA-1799 can improve the melting flow processing of PVA-g-LA copolymer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395860 [article] Preparation and rheological behaviors of thermoplastic poly(vinyl alcohol) modified by lactic acid [texte imprimé] / Jing Ding, Auteur ; Si - Chong Chen, Auteur ; Xiu - Li Wang, Auteur . - 2011 . - pp. 9123-9130. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 15 (Août 2011) . - pp. 9123-9130 Mots-clés : Preparation  Thermoplastic Résumé : A thermoplastic modified poly(vinyl alcohol) (PVA-g-LA) with improved melt processing property was prepared by melt polycondensation of PVA with lactic acid. Rheological behaviors of PVA-g-LA copolymers were investigated using a high-pressure capillary rheometer. The influences of the content of oligo-poly (lactic add) graft chains and content of PVA-0588 on the rheological properties of PVA-g-LA copolymers were researched. The rheological parameters including non-Newtonian index and the viscous flow activation energy were analyzed and evaluated. As predicted, the PVA-g-LA samples exhibited noticeable shear thinning behavior. The apparent viscosity, the viscous flow activation energy, and the non-Newtonian index of PVA-g-LA showed obvious correlation with the PLA grafting chain content and PVA-0588 content at a constant temperature and shear rate. Both the increase of the content of oligo-PLA graft chains and content of PVA-0588 with PVA-1799 can improve the melting flow processing of PVA-g-LA copolymer. DEWEY : 660 ISSN : 0888-5885 En ligne : http://cat.inist.fr/?aModele=afficheN&cpsidt=24395860

Synthesis and properties of thermoplastic poly(vinyl alcohol)-graft-lactic acid copolymers / Jing Ding in Industrial & engineering chemistry research, Vol. 48 N°2 (Janvier 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 788–793 Titre : Synthesis and properties of thermoplastic poly(vinyl alcohol)-graft-lactic acid copolymers Type de document : texte imprimé Auteurs : Jing Ding, Auteur ; Si - Chong Chen, Auteur ; Xiu - Li Wang, Auteur ; Yu-Zhong Wang, Auteur Année de publication : 2009 Article en page(s) : p. 788–793 Note générale : chemical engineering Langues : Anglais (eng) Mots-clés : Thermoplastic  Poly  --Properties Résumé : Poly(vinyl alcohol)-graft-lactic acid (PVA-g-LA) was synthesized by melt polycondensation of PVA and lactic acid using stannous chloride as a catalyst. The molecular structure of the copolymer was characterized by 1H NMR. The thermal properties of PVA-g-LA were investigated by differential scanning calorimetry and thermogravimetric analysis. The results showed that the PVA-g-LA copolymer exhibited lower glass transition temperature (Tg) and melting temperature (Tm) and higher decomposition temperature (Td) than pure PVA, and a difference of 60−80 °C between Tm and Td could be obtained, suggesting that the introduction of the oligo-poly(lactic acid) grafted chains can give rise to the melting flow processing of PVA. PVA-g-LA films prepared by compression molding at 140−150 °C had good flexibility and elasticity as well as water resistance. The copolymers have a potential application in food packaging. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013428 [article] Synthesis and properties of thermoplastic poly(vinyl alcohol)-graft-lactic acid copolymers [texte imprimé] / Jing Ding, Auteur ; Si - Chong Chen, Auteur ; Xiu - Li Wang, Auteur ; Yu-Zhong Wang, Auteur . - 2009 . - p. 788–793. chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N°2 (Janvier 2009) . - p. 788–793 Mots-clés : Thermoplastic  Poly  --Properties Résumé : Poly(vinyl alcohol)-graft-lactic acid (PVA-g-LA) was synthesized by melt polycondensation of PVA and lactic acid using stannous chloride as a catalyst. The molecular structure of the copolymer was characterized by 1H NMR. The thermal properties of PVA-g-LA were investigated by differential scanning calorimetry and thermogravimetric analysis. The results showed that the PVA-g-LA copolymer exhibited lower glass transition temperature (Tg) and melting temperature (Tm) and higher decomposition temperature (Td) than pure PVA, and a difference of 60−80 °C between Tm and Td could be obtained, suggesting that the introduction of the oligo-poly(lactic acid) grafted chains can give rise to the melting flow processing of PVA. PVA-g-LA films prepared by compression molding at 140−150 °C had good flexibility and elasticity as well as water resistance. The copolymers have a potential application in food packaging. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8013428