Thermophysical Properties of Penetrants in Polymers via a Piezoelectric Quartz Crystal Microbalance

Mikkilineni, Siva P. V. N.; Tree, D. A.; High, Martin S.

doi:10.1021/je00020a006

Cited by 15 publications

(5 citation statements)

References 33 publications

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“…QCM sensors have been successfully used in a variety of applications using standard oscillator techniques and frequency counting. One of them is its applicability in sorption of gases in solid thin films 31–41. In this work, the sorption of oxygen and carbon dioxide in PLA and PLA enriched with α‐tocopherol films was obtained by QCM technique, described in detail in a previous work36 along with its basic operating principle.…”

Section: Methodsmentioning

confidence: 99%

“…One of them is its applicability in sorption of gases in solid thin films. [31][32][33][34][35][36][37][38][39][40][41] In this work, the sorption of oxygen and carbon dioxide in PLA and PLA enriched with atocopherol films was obtained by QCM technique, described in detail in a previous work 36 along with its basic operating principle. Special care was taken so that the Sauerbray equation 42 is valid, meaning that the added mass was evenly distributed over the electrodes and is much smaller than the weight of the quartz disk, Df/f ( 1.…”

Section: Gas Solubility Measurementsmentioning

confidence: 99%

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Addition of α‐tocopherol on poly(lactic acid): Thermal, mechanical, and sorption properties

Gonçalves

Tomé

Coutinho

et al. 2010

J of Applied Polymer Sci

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This work investigates the effect of the addition of a well-known antioxidant, a-tocopherol in poly (lactic acid) flexural and barrier properties. For that purpose, films of poly(lactic acid) enriched with 0, 2.2, and 4.4% of a-tocopherol were prepared. Differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis were used to characterize the changes in the mechanical and thermal properties. The sorption of oxygen and carbon dioxide in the prepared enriched films of poly(lactic acid) was measured at different temperatures between 283 and 313 K and pressures up to atmospheric pressure using a Quartz Crystal Microbalance. Although no significant changes were found in the mechanical and thermal properties, the addition of a-tocopherol promotes an increasing in the oxygen sorption and the convex shape of the isotherms indicate a strong interaction gas-polymer. Regarding the sorption of carbon dioxide, no pronounced effect was found.

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Section: Methodsmentioning

confidence: 99%

Section: Gas Solubility Measurementsmentioning

confidence: 99%

Addition of α‐tocopherol on poly(lactic acid): Thermal, mechanical, and sorption properties

Gonçalves

Tomé

Coutinho

et al. 2010

J of Applied Polymer Sci

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“…VLE data for some polymer solutions have been compiled in some references. − However, the database for polymer solutions is limited in the number of systems and in the experimental conditions available. Several experimental techniques have been employed to measure the solvent activities of polymer solution such as gas chromatography, − gravimetric sorption, − and a piezoelectric sorption detector. − …”

Section: Introductionmentioning

confidence: 99%

Solubilities of Dichloromethane, Diethyl Ether, Ethyl Acetate, and Nitrobenzene in Three Polymers Using the Piezoelectric Quartz Sorption Method

et al. 2010

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The solubilities of dichloromethane, diethyl ether, ethyl acetate, nitrobenzene in polyisobutylene (PIB), poly(nbutyl methacrylate) (PBMA), and poly(vinyl acetate) (PVAc) were measured by the piezoelectric quartz crystal microbalance method at four temperatures, (293.2, 313.2, 333.2, and 353.2) K. In this work, three quartz crystals were installed in an equilibrium cell, which enables multiple solubility measurements. The estimated experimental uncertainty was less than 1 % for solvent activity and 6.6 % mass fraction at the lowest solubility region, with a lower uncertainty being found in the higher solubility region. The accuracy of the apparatus was confirmed by comparison of the experimental data obtained in this work with the literature data. The Flory-Huggins equation with the temperature-dependent interaction parameter was used for the correlation of the experimental data with an overall average absolute deviation in activities of 6.5 %.

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“…The application of quartz crystal microbalance (QCM) devices for sensing chemical vapor was first described by King and has remained an active research field. This technique has been applied by many researchers − for the solubility measurement of organic vapors and high-pressure gases in polymers. The method has high sensitivity and offers the advantageous of generating data much more rapidly than alternative gravimetric methods such as electronic and quartz spring microbalances as shown by Mikkilineni et al, French and Koplos, and Boudouris et al…”

Section: Introductionmentioning

confidence: 99%

Solubility of Seven Nonpolar Organic Solvents in Four Polymers Using the Piezoelectric−Quartz Sorption Method

et al. 2002

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Solubility of octane, cyclopentane, cyclohexane, benzene, toluene, ethylbenzene and p-xylene in cis-1,4polyisoprene, polyisobutylene, poly(n-butyl methacrylate), and poly(vinyl acetate) were measured by the piezoelectric quartz crystal microbalance method at four temperatures (293.2, 313.2, 333.2, and 353.2) K. In this work, four quartz crystals were installed in an equilibrium cell, which enables multiple solubility measurements. Estimated uncertainties of measured variables were (0.05 K for temperature, (0.009 for activity, and (0.002 for mass fraction. The accuracy of the method was confirmed by comparison with literature data. The activities obtained were correlated by the UNIQUAC equation with an overall AAD of 4.1%.

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Thermophysical Properties of Penetrants in Polymers via a Piezoelectric Quartz Crystal Microbalance

Cited by 15 publications

References 33 publications

Addition of α‐tocopherol on poly(lactic acid): Thermal, mechanical, and sorption properties

Addition of α‐tocopherol on poly(lactic acid): Thermal, mechanical, and sorption properties

Solubilities of Dichloromethane, Diethyl Ether, Ethyl Acetate, and Nitrobenzene in Three Polymers Using the Piezoelectric Quartz Sorption Method

Solubility of Seven Nonpolar Organic Solvents in Four Polymers Using the Piezoelectric−Quartz Sorption Method

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