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Amount of Solvent

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John M. Prausnitz – One of the best experts on this subject based on the ideXlab platform.

  • Vapor–liquid equilibria for binary solutions of polyisobutylene in C 6 through C 9 n -alkanes
    Polymer, 1999
    Co-Authors: John G. Lieu, John M. Prausnitz

    Abstract:

    Abstract Vapor–liquid equilibria for binary solutions of polyisobutylene in C6 through C9n-alkanes were obtained at 65°C. Using a classic gravimetric-sorption method, the Amount of Solvent absorbed by polyisobutylene was measured as a function of Solvent vapor pressure. The data were interpreted by the Flory–Huggins theory and the Prigogine–Flory–Patterson theory.

  • Vapor−Liquid Equilibria for Dendritic-Polymer Solutions
    Journal of Chemical & Engineering Data, 1999
    Co-Authors: John G. Lieu, Mingjun Liu, Jean M. J. Fréchet, John M. Prausnitz

    Abstract:

    Vapor−liquid equilibria for dendritic-polymer solutions were obtained using a classic gravimetric-sorption method; the Amount of Solvent absorbed by the dendrimer was measured as a function of solv…

  • Vapor-liquid equilibria for solutions of dendritic polymers
    Journal of Chemical & Engineering Data, 1998
    Co-Authors: Cristina Mio, John M. Prausnitz, Simona Kiritsov, Yonathan Thio, Rebecca Brafman, Craig J. Hawker, Eva Malmström

    Abstract:

    Vapor−liquid equilibrium data were obtained for dendritic polymer solutions using a classic isothermal gravimetric-sorption method; the Amount of Solvent absorbed by the dendrimer was measured at increasing Solvent activity. The polymers were polyamidoamine (PAMAM) dendrimers of generations 1, 2, and 4 and benzyl ether dendrimers with different end groups (aromatic rings, dodecyl chains, methyl ester groups, perfluoroalkyl chains) of generations 2 to 6, and two series of benzyl ether linear polymers that are analogues of the dendrimers. Solvents were acetone, acetonitrile, chloroform, cyclohexane, methanol, n-pentane, n-propylamine, tetrahydrofuran, and toluene. The temperature range was 35 to 89 °C. The Amount of Solvent absorbed by the dendrimers depends, sometimes strongly, on the kind of dendrimer end groups. The relation between Solvent absorption and dendrimer generation number, or molecular weight, depends on the Solvent−dendrimer system and on temperature. Solvent absorption in linear polymers is …

Valeria Flores Peres – One of the best experts on this subject based on the ideXlab platform.

  • comparison of soxhlet ultrasound assisted and pressurized liquid extraction of terpenes fatty acids and vitamin e from piper gaudichaudianum kunth
    Journal of Chromatography A, 2006
    Co-Authors: Valeria Flores Peres, Jenifer Saffi, Maria Ines Soares Melecchi, Fernanda Contieri Abad, Rosângela Assis Jacques, Migdalia Miranda Martinez, Eniz Conceicao Oliveira, Elina Bastos Caramao

    Abstract:

    This paper describes a comparative study of extraction methods of terpenes (terpenic alcohols and phytosterols), fatty acids and Vitamin E from leaves of Piper gaudichaudianum Kunth. The analysis of extracts was done by gas chromatography with mass spectrometric detection. The identification and quantification was made by co-injections of the extract with certified standards. The use of pressurized liquid extraction (PLE; Dionex trade name: ASE, for accelerated Solvent extraction) decrease significantly the total time of extraction, the Amount of Solvent and the manipulation of sample and Solvents in comparison with soxhlet (SE) and ultrasound-assisted (USE). In addition, PLE was more effective for the extractions of terpenes (terpenic alcohols and phytosterols), fatty acids and Vitamin E.

Elina Bastos Caramao – One of the best experts on this subject based on the ideXlab platform.

  • comparison of soxhlet ultrasound assisted and pressurized liquid extraction of terpenes fatty acids and vitamin e from piper gaudichaudianum kunth
    Journal of Chromatography A, 2006
    Co-Authors: Valeria Flores Peres, Jenifer Saffi, Maria Ines Soares Melecchi, Fernanda Contieri Abad, Rosângela Assis Jacques, Migdalia Miranda Martinez, Eniz Conceicao Oliveira, Elina Bastos Caramao

    Abstract:

    This paper describes a comparative study of extraction methods of terpenes (terpenic alcohols and phytosterols), fatty acids and Vitamin E from leaves of Piper gaudichaudianum Kunth. The analysis of extracts was done by gas chromatography with mass spectrometric detection. The identification and quantification was made by co-injections of the extract with certified standards. The use of pressurized liquid extraction (PLE; Dionex trade name: ASE, for accelerated Solvent extraction) decrease significantly the total time of extraction, the Amount of Solvent and the manipulation of sample and Solvents in comparison with soxhlet (SE) and ultrasound-assisted (USE). In addition, PLE was more effective for the extractions of terpenes (terpenic alcohols and phytosterols), fatty acids and Vitamin E.