Thermodynamic study of two different chewing-gum bases by inverse gas chromatography

Niederer, Brigitte; Lê, A. D.; Cantergiani, Ennio

doi:10.1016/s0021-9673(03)00613-7

Cited by 17 publications

(7 citation statements)

References 15 publications

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“…Inverse gas chromatography (IGC) has proved to be a powerful tool for the measurement of thermodynamic properties of materials, over a wide temperature range 4, 6–8. Various types of polymeric materials have been characterized by the employment of IGC, because it can provide abundant and essential information on the interaction between materials and solvents 9–12…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic characterization of poly(2,2,3,3,3‐pentafluoropropyl methacrylate)

Papadopoulou

Karapanagiotis

Zuburtikudis

et al. 2010

J Polym Sci B Polym Phys

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The thermodynamic characterization of a fluorinated methacrylic homopolymer was conducted by means of inverse gas chromatography (IGC), at infinite dilution. The homopolymer under study, poly(2,2,3,3,3-pentafluoropropyl methacrylate) (PPFPMA), was synthesized via a free radical polymerization reaction and was characterized by the employment of Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and size exclusion chromatography (SEC) techniques. The specific retention volume of 15 solvents, used as probes, was used for the assessment of the Flory-Huggins interaction parameter, the weight fraction activity coefficient, the molar heat, energy and entropy of sorption, the partial heat of mixing of the probes, as well as the solubility parameter of the polymer. The results demonstrate that PPFPMA is insoluble in most organic solvents even at increased temperatures, with the exception of solvents like 2-Butanone.Recently, Prathab et al. 13 calculated the density, the total surface energy, and the solubility parameter of PPFPMA by molecular dynamics simulations (MD). Apart from the MD approach, no other experimental data concerning the thermodynamic properties at various temperatures are available in the literature, for this polymer.The first results from a systematic investigation of the interaction of PPFPMA with various solvents and the solubility of the polymer in these solvents, using thermodynamic data, are reported in this work. In particular, the new results concern the molar heat, energy and entropy of sorption, the molar heat of mixing, and the heat of vaporization of 15 solvents, the weight fraction activity coefficient, the Flory-

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Section: Introductionmentioning

confidence: 99%

Thermodynamic characterization of poly(2,2,3,3,3‐pentafluoropropyl methacrylate)

Papadopoulou

Karapanagiotis

Zuburtikudis

et al. 2010

J Polym Sci B Polym Phys

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“…The probe specific retention volume, V g 0 corrected to 273.15 K was calculated from the standard chromatographic relation [6,7] :…”

Section: Principle Of Determining Solubility Parameter Of Polymer By mentioning

confidence: 99%

Determination of the solubility parameter of cellulose acrylate using inverse gas chromatography

et al. 2007

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The solubility parameters of cellulose acrylate substituted degree 2.12 (CEA) have been calculated from the measured retention data by inverse gas chromatography at various temperatures. The weight fraction activity coefficients of the solvents at infinite dilution (Ω 1 ∞ ), the Flory-Huggins thermodynamic interaction parameters between CEA and solvents (χ ∞ 12 ), the excess molar heats of mixing (ΔH 1 s ), the partial molar heats of mixing at infinite dilution (ΔH 1 ∞ ), the solubility parameters of solvent (δ 1 ), and the solubility parameters of CEA (δ 2 ), were calculated at various temperatures. The δ 2 of the CEA was 17.32, 18.00, 18.13, 18.54, 19.39 at 55, 60, 65, 70 and 75℃, respectively. solubility parameter, cellulose acrylate, inverse gas chromatographyCellulose is one of the richest and reproducible natural polymers in the world and is applied vastly to spin, paper making, pharmacy, packing, as well as flexible liquid crystal display and separate membrane materials [1,2] . If unsaturated groups were bonded to cellulose, and then copolymerization with ethenyl monomer, one could design and synthesize the macromolecule chain-ordered membranes controlled well in three-dimension web crosslinked structure, that would have some important application in separating membranes and liquid crystal display. Whereas, one of the key technologies of forming membranes controlled well in structure is the selection of the solvents and regeneration bath of cellulose or its derivatives. The solubility parameter is an important thermodynamic parameter to characterize the polymer solution property. It has an important theoretical meaning in determining polymer dissolution behavior and character. Generally, the solubility parameter is measured by static state, for example the Swelling Method, the Viscosimetric Method, and the Turbidimetry Method. These methods not only consume time but also obtain only the thermodynamic parameters of the mixture of the polymer and the solvent. Inverse gas chromatography (IGC) has been proved to be a rapid and consistent method to study polymer-solvent interactions [3] . It is well established that weight fraction activity coefficients and heats of dilution may be derived accurately for these systems from IGC measurements [4,5] .The main focus of this work was to determine the solubility parameter of cellulose acrylate (δ 2 ), that was obtained using IGC by determining the retention time of the probe molecules used to calculate the specific retention volumes of the probe molecules, furthermore to calculate the weight fraction activity coefficients of the solvents at infinite dilution (Ω 1 ∞ ), the Flory-Huggins thermodynamic interaction parameters (χ ∞ 12 ), and the solubility parameter of the solvents (δ 1 ), from which the solubility parameters of cellulose acrylate (δ 2 ), were gained. This work not only afforded a theoretical guidance for selecting solvents of CEA, but also proved the

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“…The technique of inverse gas chromatography, IGC, has been successfully applied to study volatile compound–material interactions as well as to calculate physicochemical parameters for the interaction between starch and aroma compounds. − …”

Section: Introductionmentioning

confidence: 99%

Reversed-Flow Gas Chromatography as a Tool for Studying the Interaction between Aroma Compounds and Starch

Farmakis

Koliadima

Karaiskakis

et al. 2018

J. Agric. Food Chem.

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The versatile technique of reversed-flow gas chromatography was introduced to calculate physicochemical quantities for the interaction between aroma compounds and starch. Adsorption, adsorption/desorption, and surface reaction rate constants as well as surface diffusion coefficients for the vapors of aroma compounds over the different starch surfaces were calculated in the temperature range of 303.15–333.15 K. Enthalpies of adsorption between −45.5 and −109.0 kJ mol–1 and enthalpies of physicochemical interaction between 6.8 and 47.4 kJ mol–1 were also calculated for all the systems studied. From the obtained results, it is concluded that the interaction forces between aroma compounds and starch correspond to weak energy bonds such as hydrogen bonds and dipole–dipole interactions. For all the systems studied, except for the system heptanal/potato, physical sorption of aroma compounds on starch granules was indicated according to the calculated activation energies.

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Thermodynamic study of two different chewing-gum bases by inverse gas chromatography

Cited by 17 publications

References 15 publications

Thermodynamic characterization of poly(2,2,3,3,3‐pentafluoropropyl methacrylate)

Thermodynamic characterization of poly(2,2,3,3,3‐pentafluoropropyl methacrylate)

Determination of the solubility parameter of cellulose acrylate using inverse gas chromatography

Reversed-Flow Gas Chromatography as a Tool for Studying the Interaction between Aroma Compounds and Starch

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