Cellulose/soy protein isolate blend films prepared via room-temperature ionic liquid / Rong-Lan Wu in Industrial & engineering chemistry research, Vol. 48 N° 15 (Août 2009)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7132–7136 Titre : Cellulose/soy protein isolate blend films prepared via room-temperature ionic liquid Type de document : texte imprimé Auteurs : Rong-Lan Wu, Auteur ; Xiu-Li Wang, Auteur ; Yu-Zhong Wang, Auteur Année de publication : 2009 Article en page(s) : pp. 7132–7136 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Ionic liquid AmimCl Soy protein isolate Fourier transform infrared spectrum Résumé : An ionic liquid (IL), 1-ally-3-methylimidazolium chloride (AmimCl), was used as cosolvent for cellulose and soy protein isolate (SPI) to prepare different compositions of cellulose/SPI blend films, which were coagulated under a nonsolvent condition. The structures of the blend films were investigated by Fourier transform infrared (FTIR) spectrum, X-ray diffraction (XRD), scanning electron microscope (SEM), and transparence analysis, and the physical properties of the films such as mechanical properties, water resistance, water vapor permeability, gas permeability, and thermal stability were also examined. The results indicate that cellulose/SPI blends have excellent miscibility in all weight ratios of cellulose to SPI. With the increase of cellulose content in blend films, the tensile strength, elongation at break, water resistance, and thermal stability of the cellulose/SPI blend films all increase. The addition of the cellulose results in a decrease in the water vapor permeability values. In addition, all films have high gas barrier capacities. These films appear to have the potential as packing and/or coating materials, replacing synthetic polymer films. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9001052 [article] Cellulose/soy protein isolate blend films prepared via room-temperature ionic liquid [texte imprimé] / Rong-Lan Wu, Auteur ; Xiu-Li Wang, Auteur ; Yu-Zhong Wang, Auteur . - 2009 . - pp. 7132–7136. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 15 (Août 2009) . - pp. 7132–7136 Mots-clés : Ionic liquid AmimCl Soy protein isolate Fourier transform infrared spectrum Résumé : An ionic liquid (IL), 1-ally-3-methylimidazolium chloride (AmimCl), was used as cosolvent for cellulose and soy protein isolate (SPI) to prepare different compositions of cellulose/SPI blend films, which were coagulated under a nonsolvent condition. The structures of the blend films were investigated by Fourier transform infrared (FTIR) spectrum, X-ray diffraction (XRD), scanning electron microscope (SEM), and transparence analysis, and the physical properties of the films such as mechanical properties, water resistance, water vapor permeability, gas permeability, and thermal stability were also examined. The results indicate that cellulose/SPI blends have excellent miscibility in all weight ratios of cellulose to SPI. With the increase of cellulose content in blend films, the tensile strength, elongation at break, water resistance, and thermal stability of the cellulose/SPI blend films all increase. The addition of the cellulose results in a decrease in the water vapor permeability values. In addition, all films have high gas barrier capacities. These films appear to have the potential as packing and/or coating materials, replacing synthetic polymer films. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie9001052

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Halogen - free flame - retardant flexible polyurethane foam with a novel nitrogen – phosphorus flame retardant / Ming-Jun Chen in Industrial & engineering chemistry research, Vol. 51 N° 29 (Juillet 2012)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9769–9776 Titre : Halogen - free flame - retardant flexible polyurethane foam with a novel nitrogen – phosphorus flame retardant Type de document : texte imprimé Auteurs : Ming-Jun Chen, Auteur ; Zhu-Bao Shao, Auteur ; Xiu-Li Wang, Auteur Année de publication : 2012 Article en page(s) : pp. 9769–9776 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Halogen Nitrogen Résumé : A novel nitrogen–phosphorus flame retardant, 2-carboxyethyl(phenyl)phosphinic acid melamine salt (CMA), was synthesized by the reaction of 2-carboxyethyl(phenyl)phosphinic acid with melamine in aqueous solution, and it was characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), inductively coupled plasma-atomic emission spectrometry (ICP-AES), elemental analysis, and thermogravimetric analysis (TGA). Halogen-free flame-retardant flexible polyurethane foams (FPUF) were prepared successfully by using CMA as a flame retardant. The effects of CMA content on the mechanical, thermal, and flame-retardant properties of FPUF were investigated by tensile test, TGA, limiting oxygen index (LOI), flame propagation test (Cal T.B. 117A-Part I standard), and cone calorimeter. The foam morphology of FPUF was studied via scanning electron microscopy (SEM). The results showed that CMA endowed FPUF with good flame-retardant properties. FPUF containing only 12 wt % CMA can pass Cal T.B. 117A-Part I standard, and its LOI value was increased from 18.2 (for FPUF without CMA) to 24.1. Particularly, the addition of CMA almost did not decrease the mechanical properties of the resulting flame-retardant FPUFs. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301004d [article] Halogen - free flame - retardant flexible polyurethane foam with a novel nitrogen – phosphorus flame retardant [texte imprimé] / Ming-Jun Chen, Auteur ; Zhu-Bao Shao, Auteur ; Xiu-Li Wang, Auteur . - 2012 . - pp. 9769–9776. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 29 (Juillet 2012) . - pp. 9769–9776 Mots-clés : Halogen Nitrogen Résumé : A novel nitrogen–phosphorus flame retardant, 2-carboxyethyl(phenyl)phosphinic acid melamine salt (CMA), was synthesized by the reaction of 2-carboxyethyl(phenyl)phosphinic acid with melamine in aqueous solution, and it was characterized by Fourier transform infrared spectroscopy (FT-IR), nuclear magnetic resonance (NMR), inductively coupled plasma-atomic emission spectrometry (ICP-AES), elemental analysis, and thermogravimetric analysis (TGA). Halogen-free flame-retardant flexible polyurethane foams (FPUF) were prepared successfully by using CMA as a flame retardant. The effects of CMA content on the mechanical, thermal, and flame-retardant properties of FPUF were investigated by tensile test, TGA, limiting oxygen index (LOI), flame propagation test (Cal T.B. 117A-Part I standard), and cone calorimeter. The foam morphology of FPUF was studied via scanning electron microscopy (SEM). The results showed that CMA endowed FPUF with good flame-retardant properties. FPUF containing only 12 wt % CMA can pass Cal T.B. 117A-Part I standard, and its LOI value was increased from 18.2 (for FPUF without CMA) to 24.1. Particularly, the addition of CMA almost did not decrease the mechanical properties of the resulting flame-retardant FPUFs. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301004d

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Novel semibiobased copolyester containing poly (trimethylene - co - hexamethylene terephthalate) and poly (lactic acid) segments / Zhu Xiong in Industrial & engineering chemistry research, Vol. 49 N° 13 (Juillet 2010)  

Public ISBD [article]  inIndustrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 5986–5992 Titre : Novel semibiobased copolyester containing poly (trimethylene - co - hexamethylene terephthalate) and poly (lactic acid) segments Type de document : texte imprimé Auteurs : Zhu Xiong, Auteur ; Jian-Bing Zeng, Auteur ; Xiu-Li Wang, Auteur Année de publication : 2010 Article en page(s) : pp. 5986–5992 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Polymer Acid Résumé : Poly (l-lactic acid) (PLLA) is a biobased polymer, and poly(trimethylene terephthalate) (PTT) is a semibiobased polymer. However, PLLA is biodegradable, and PTT is not. In this paper, their copolymers (PTHT−PLLA) are synthesized via chain-extension reaction of hydroxyl terminated poly(trimethylene-co-hexamethylene terephthalate) (PTHT−OH) and hydroxyl terminated poly(l-lactic acid) (PLLA−OH) using toluene-2,4-diisocyanate (TDI) as a chain extender. The structures and molecular weights of PTHT−OH, PLLA−OH, and PTHT−PLLA were characterized by Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance (1H NMR), and gel permeation chromatography (GPC). The thermal, crystalline, and mechanical properties of PTHT−PLLA were further studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and tensile testing. The resulting PTHT−PLLA copolyesters went through a two-stage thermal decomposition behavior and showed two glass transition temperatures. The tensile testing results showed that PTHT−PLLA copolyesters have excellent flexibility with a strain of more than 300%, which is much higher than that of PLLA. The copolyesters are expected to have a better biodegradability than PTT. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100817h [article] Novel semibiobased copolyester containing poly (trimethylene - co - hexamethylene terephthalate) and poly (lactic acid) segments [texte imprimé] / Zhu Xiong, Auteur ; Jian-Bing Zeng, Auteur ; Xiu-Li Wang, Auteur . - 2010 . - pp. 5986–5992. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 5986–5992 Mots-clés : Polymer Acid Résumé : Poly (l-lactic acid) (PLLA) is a biobased polymer, and poly(trimethylene terephthalate) (PTT) is a semibiobased polymer. However, PLLA is biodegradable, and PTT is not. In this paper, their copolymers (PTHT−PLLA) are synthesized via chain-extension reaction of hydroxyl terminated poly(trimethylene-co-hexamethylene terephthalate) (PTHT−OH) and hydroxyl terminated poly(l-lactic acid) (PLLA−OH) using toluene-2,4-diisocyanate (TDI) as a chain extender. The structures and molecular weights of PTHT−OH, PLLA−OH, and PTHT−PLLA were characterized by Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance (1H NMR), and gel permeation chromatography (GPC). The thermal, crystalline, and mechanical properties of PTHT−PLLA were further studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and tensile testing. The resulting PTHT−PLLA copolyesters went through a two-stage thermal decomposition behavior and showed two glass transition temperatures. The tensile testing results showed that PTHT−PLLA copolyesters have excellent flexibility with a strain of more than 300%, which is much higher than that of PLLA. The copolyesters are expected to have a better biodegradability than PTT. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie100817h

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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]  inIndustrial & 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

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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]  inIndustrial & 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

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