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Li-sheng Wang - One of the best experts on this subject based on the ideXlab platform.

  • Solubilities of Three Phosphorus Flame Retardants in Selected Organic Solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Li-sheng Wang, Jian Sun, Lin-kun Jiang
    Abstract:

    Using a static analytical method, the solubilities of phosphonic Acid, P,P′-(1,4-piperazinediyl)bis-P,P,P′,P′-tetraphenyl ester (PAPBE), N,N′-[1,3-phenylenebis(methylene)]bis(Phosphoramidic Acid)P,P,P′,P′-tetraphenyl ester (PNBE), and 4-(hydroxymethyl)-1-oxido-2,6,7-trioxa-1-phosphabicyclo [2.2.2] octane (PEPA) were measured from 293.15 K to 343.15 K in four selected organic solvents. Several thermodynamic models were used to correlate the experimental solubility data, such as Scatchard–Hildebrand, Wilson, nonrandom two-liquid (NRTL), and UNIQUAC. The calculated results showed that all the models reproduced the experimental data very well, and the UNIQUAC equation gives the best correlation. Using the group contribution methods, the solubility parameters of phosphorus flame retardants can be calculated, which were compared with the previous values calculated with the Scatchard–Hildebrand model.

  • Solid–Liquid Phase Equilibria of N,N′-[1,3-Phenylenebis(methylene)]bis(Phosphoramidic Acid) P,P,P′,P′-Tetraphenyl Ester in 10 Pure Solvents
    Journal of Chemical & Engineering Data, 2014
    Co-Authors: Li-sheng Wang
    Abstract:

    N,N′-[1,3-Phenylenebis(methylene)]bis(Phosphoramidic Acid) P,P,P′,P′-tetraphenyl ester (PNBE) was synthesized and characterized by elemental analysis, mass spectrometry, and IR and NMR spectroscopy. The melting point and the enthalpy of fusion of PNBE were obtained by differential scanning calorimetry, and the thermal stability of PNBE was measured by thermogravimetric analysis. The solubilities of PNBE in selected solvents were determined by a gravimetric method. The experimental data were correlated with the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) equations. The calculated results showed good agreement with the experimental data. Among them, the Wilson model gave the best description of the solubility data. The solubility parameter of PNBE was evaluated using the Scatchard–Hildebrand model. The data presented in this work will be helpful for the choice of solvents for the solution-casting process and optimization of the dissolution or purification of PNBE.

  • solid liquid phase equilibria of n n 1 3 phenylenebis methylene bis Phosphoramidic Acid p p p p tetraphenyl ester in 10 pure solvents
    Journal of Chemical & Engineering Data, 2014
    Co-Authors: Li-sheng Wang
    Abstract:

    N,N′-[1,3-Phenylenebis(methylene)]bis(Phosphoramidic Acid) P,P,P′,P′-tetraphenyl ester (PNBE) was synthesized and characterized by elemental analysis, mass spectrometry, and IR and NMR spectroscopy. The melting point and the enthalpy of fusion of PNBE were obtained by differential scanning calorimetry, and the thermal stability of PNBE was measured by thermogravimetric analysis. The solubilities of PNBE in selected solvents were determined by a gravimetric method. The experimental data were correlated with the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) equations. The calculated results showed good agreement with the experimental data. Among them, the Wilson model gave the best description of the solubility data. The solubility parameter of PNBE was evaluated using the Scatchard–Hildebrand model. The data presented in this work will be helpful for the choice of solvents for the solution-casting process and optimization of the dissolution or purification of PNBE.

  • Solid–Liquid Phase Equilibria of N,N′‑[1,3-Phenylenebis(methylene)]bis(Phosphoramidic Acid) P,P,P′,P′‑Tetraphenyl Ester in 10 Pure Solvents
    2014
    Co-Authors: Li-sheng Wang
    Abstract:

    N,N′-[1,3-Phenylenebis­(methylene)]­bis­(Phosphoramidic Acid) P,P,P′,P′-tetraphenyl ester (PNBE) was synthesized and characterized by elemental analysis, mass spectrometry, and IR and NMR spectroscopy. The melting point and the enthalpy of fusion of PNBE were obtained by differential scanning calorimetry, and the thermal stability of PNBE was measured by thermogravimetric analysis. The solubilities of PNBE in selected solvents were determined by a gravimetric method. The experimental data were correlated with the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical (UNIQUAC) equations. The calculated results showed good agreement with the experimental data. Among them, the Wilson model gave the best description of the solubility data. The solubility parameter of PNBE was evaluated using the Scatchard–Hildebrand model. The data presented in this work will be helpful for the choice of solvents for the solution-casting process and optimization of the dissolution or purification of PNBE

  • Solid–Liquid Phase Equilibrium of N,N′-(Methylenedi-4,1-phenylene)bis(Phosphoramidic Acid) Tetraphenyl Ester in Selected Solvents
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Li-sheng Wang, Gui-qin Sun
    Abstract:

    N,N′-(Methylenedi-4,1-phenylene)bis(Phosphoramidic Acid) tetraphenyl ester (PNBTE), a flame retardant with high thermal stability, was synthesized and characterized by elemental analysis (EA), mass...

Gui-qin Sun - One of the best experts on this subject based on the ideXlab platform.

Lijuan Wang - One of the best experts on this subject based on the ideXlab platform.

  • Solubilities of Phosphoramidic Acid, N-(phenylmethyl)-, Diphenyl Ester in Selected Solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Lijuan Wang, Xiaojie Wang, Hongyan Zeng, Jun Yao, Baokuan Chen
    Abstract:

    Phosphoramidic Acid, N-(phenylmethyl)-, diphenyl ester (PANDE) was synthesized, and its thermostability was measured by thermogravimetric analysis. The melting temperature and the fusion enthalpy of PANDE were evaluated by a differential scanning calorimeter. The solubilities of PANDE in chloroform, tertrahydrofuran, dichloromethane, acetone, methyl acetate, ethyl acetate, acetonitrile, methanol, and toluene were measured by a gravimetric method at different temperatures. The solubilities of PANDE in different solvents at low temperatures are in the order of chloroform > tetrahydrofuran > dichloromethane > acetone > methyl acetate > ethyl acetate > acetonitrile > methanol > toluene. At higher temperatures the order is the same except that acetonitrile now becomes the least soluble. The solubility data of PANDE in nine selected solvents were well fitted by the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical equations. The Wilson model and the NRTL model show better agreement in general. Fi...

  • Solid–Liquid Phase Equilibrium of Phosphoramidic Acid, N,N′-1,2-Ethanediylbis-P,P,P′,P′-tetraphenyl Ester in Selected Solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model.

  • solid liquid phase equilibrium of Phosphoramidic Acid n n 1 2 ethanediylbis p p p p tetraphenyl ester in selected solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model.

  • Solubilities of Phosphoramidic Acid, N‑(phenylmethyl)‑, Diphenyl Ester in Selected Solvents
    2015
    Co-Authors: Lijuan Wang, Xiaojie Wang, Hongyan Zeng, Jun Yao, Baokuan Chen
    Abstract:

    Phosphoramidic Acid, N-(phenylmethyl)-, diphenyl ester (PANDE) was synthesized, and its thermostability was measured by thermogravimetric analysis. The melting temperature and the fusion enthalpy of PANDE were evaluated by a differential scanning calorimeter. The solubilities of PANDE in chloroform, tertrahydrofuran, dichloromethane, acetone, methyl acetate, ethyl acetate, acetonitrile, methanol, and toluene were measured by a gravimetric method at different temperatures. The solubilities of PANDE in different solvents at low temperatures are in the order of chloroform > tetrahydrofuran > dichloromethane > acetone > methyl acetate > ethyl acetate > acetonitrile > methanol > toluene. At higher temperatures the order is the same except that acetonitrile now becomes the least soluble. The solubility data of PANDE in nine selected solvents were well fitted by the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical equations. The Wilson model and the NRTL model show better agreement in general. Finally, the solubility parameters of PANDE were evaluated by the Scatchard–Hildebrand model, and meanwhile, the standard dissolution enthalpy, the standard dissolution entropy, and the standard molar Gibbs energy of PANDE in the selected solvents were also calculated by the van’t Hoff model and the Gibbs–Helmholtz equation. The results show that the dissolution process is endothermic and entropy-driven

  • Solid–Liquid Phase Equilibrium of Phosphoramidic Acid, N,N′‑1,2-Ethanediylbis‑P,P,P′,P′‑tetraphenyl Ester in Selected Solvents
    2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model

Baokuan Chen - One of the best experts on this subject based on the ideXlab platform.

  • Solubilities of Phosphoramidic Acid, N-(phenylmethyl)-, Diphenyl Ester in Selected Solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Lijuan Wang, Xiaojie Wang, Hongyan Zeng, Jun Yao, Baokuan Chen
    Abstract:

    Phosphoramidic Acid, N-(phenylmethyl)-, diphenyl ester (PANDE) was synthesized, and its thermostability was measured by thermogravimetric analysis. The melting temperature and the fusion enthalpy of PANDE were evaluated by a differential scanning calorimeter. The solubilities of PANDE in chloroform, tertrahydrofuran, dichloromethane, acetone, methyl acetate, ethyl acetate, acetonitrile, methanol, and toluene were measured by a gravimetric method at different temperatures. The solubilities of PANDE in different solvents at low temperatures are in the order of chloroform > tetrahydrofuran > dichloromethane > acetone > methyl acetate > ethyl acetate > acetonitrile > methanol > toluene. At higher temperatures the order is the same except that acetonitrile now becomes the least soluble. The solubility data of PANDE in nine selected solvents were well fitted by the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical equations. The Wilson model and the NRTL model show better agreement in general. Fi...

  • Solid–Liquid Phase Equilibrium of Phosphoramidic Acid, N,N′-1,2-Ethanediylbis-P,P,P′,P′-tetraphenyl Ester in Selected Solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model.

  • solid liquid phase equilibrium of Phosphoramidic Acid n n 1 2 ethanediylbis p p p p tetraphenyl ester in selected solvents
    Journal of Chemical & Engineering Data, 2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model.

  • Solubilities of Phosphoramidic Acid, N‑(phenylmethyl)‑, Diphenyl Ester in Selected Solvents
    2015
    Co-Authors: Lijuan Wang, Xiaojie Wang, Hongyan Zeng, Jun Yao, Baokuan Chen
    Abstract:

    Phosphoramidic Acid, N-(phenylmethyl)-, diphenyl ester (PANDE) was synthesized, and its thermostability was measured by thermogravimetric analysis. The melting temperature and the fusion enthalpy of PANDE were evaluated by a differential scanning calorimeter. The solubilities of PANDE in chloroform, tertrahydrofuran, dichloromethane, acetone, methyl acetate, ethyl acetate, acetonitrile, methanol, and toluene were measured by a gravimetric method at different temperatures. The solubilities of PANDE in different solvents at low temperatures are in the order of chloroform > tetrahydrofuran > dichloromethane > acetone > methyl acetate > ethyl acetate > acetonitrile > methanol > toluene. At higher temperatures the order is the same except that acetonitrile now becomes the least soluble. The solubility data of PANDE in nine selected solvents were well fitted by the Wilson, nonrandom two-liquid (NRTL), and universal quasichemical equations. The Wilson model and the NRTL model show better agreement in general. Finally, the solubility parameters of PANDE were evaluated by the Scatchard–Hildebrand model, and meanwhile, the standard dissolution enthalpy, the standard dissolution entropy, and the standard molar Gibbs energy of PANDE in the selected solvents were also calculated by the van’t Hoff model and the Gibbs–Helmholtz equation. The results show that the dissolution process is endothermic and entropy-driven

  • Solid–Liquid Phase Equilibrium of Phosphoramidic Acid, N,N′‑1,2-Ethanediylbis‑P,P,P′,P′‑tetraphenyl Ester in Selected Solvents
    2015
    Co-Authors: Baokuan Chen, Hui Zhou, Jingjing Wang, Lijuan Wang
    Abstract:

    Phosphoramidic Acid, N,N′-1,2-ethanediylbis-P,P,P′,P′-tetraphenyl ester (PAETE) was prepared and characterized by elemental analysis (EA), mass spectra (MS), infrared spectroscopy (IR), and nuclear magnetic resonance (NMR). The thermostability of PAETE was measured via thermogravimetric analysis (TGA). The melting temperature and the fusion enthalpy of PAETE were evaluated by differential scanning calorimeter (DSC). The solubilities of PAETE in ten selected solvents were obtained using a gravimetric method. The experimental data were well correlated by the Buchowski–Ksiazczak (λh), Scatchard–Hildebrand, modified Apelblat model, and the ideal equations. The solubility parameter of PAETE was estimated by the Scatchard–Hildebrand Model. The dissolution enthalpy and entropy of PAETE in the ten selected solvents were also calculated by the modified Apelblat model

Kai Guo - One of the best experts on this subject based on the ideXlab platform.

  • Phosphoramidic Acid catalyzed controlled living ring opening polymerization of trimethylene carbonate
    Polymer, 2013
    Co-Authors: Jia Chen, Suli Kan, Haidong Xia, Feng Zhou, Xing Chen, Xiaoqin Jiang, Kai Guo
    Abstract:

    Abstract The ring-opening polymerization (ROP) of trimethylene carbonate (TMC) catalyzed by Phosphoramidic Acid (PAA) and initiated with benzyl alcohol (BnOH) has been investigated. The polymerization conditions were optimized to afford well-defined polytrimethylene carbonates (PTMCs). The molecular weight of the obtained PTMC with the [TMC]0/[BnOH]0/[PAA]0 ratio of 40:1:1 was analyzed by 1H NMR, Mn = 4180 g mol−1, showed good agreement with that estimated from the initial ratio, Mn = 3830 g mol−1. The kinetics and chain extension experiments have been carried out to further justify the controlled/living nature of this polymerization. The 1H NMR, SEC, and MALDI-TOF MS measurements were applied to analyze the obtained PTMCs.

  • Phosphoramidic Acid catalyzed controlled/living ring-opening polymerization of trimethylene carbonate
    Polymer, 2013
    Co-Authors: Jia Chen, Suli Kan, Haidong Xia, Zhou Feng, Chen Xing, Jiang Xiaoqin, Kai Guo
    Abstract:

    Abstract The ring-opening polymerization (ROP) of trimethylene carbonate (TMC) catalyzed by Phosphoramidic Acid (PAA) and initiated with benzyl alcohol (BnOH) has been investigated. The polymerization conditions were optimized to afford well-defined polytrimethylene carbonates (PTMCs). The molecular weight of the obtained PTMC with the [TMC]0/[BnOH]0/[PAA]0 ratio of 40:1:1 was analyzed by 1H NMR, Mn = 4180 g mol−1, showed good agreement with that estimated from the initial ratio, Mn = 3830 g mol−1. The kinetics and chain extension experiments have been carried out to further justify the controlled/living nature of this polymerization. The 1H NMR, SEC, and MALDI-TOF MS measurements were applied to analyze the obtained PTMCs.