Diffusion and desorption of CO<sub>2</sub> in foamed polystyrene film

Qian, Ying-Hui; Cao, Jun‐Ming; Li, Xuekun; Cao, Gaoping; Wang, Changchun; Shi, Yun‐Hai

doi:10.1002/app.45645

Cited by 7 publications

(2 citation statements)

References 41 publications

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“…Therefore, researchers examining plastic foaming initially measure the solubility and then conduct experiments. Many studies have been conducted on the solubility of various polymers including polycarbonate [7,8], polyethylene [9,10], polypropylene [11,12], polyurethane [13,14], and polystyrene [15,16], and such studies are still being conducted.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Kim

Ryu

et al. 2022

Polymers

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Several researchers have investigated the phenomenon of polymer–gas mixtures, and a few have proposed diffusion coefficient values instead of a diffusion coefficient model. There is a paucity of studies focused on the continuous change in the diffusion coefficient corresponding to the overall pressure and temperature range of the mixture. In this study, the gas sorption and desorption experiments of poly(methyl methacrylate) (PMMA) were conducted via solid-state batch foaming, and the weight change was measured using the gravimetric method with a magnetic balance. The control parameters were temperature, which ranged from 290 to 370 K, and pressure, which ranged from 2 to 5 MPa; in the subcritical regime. Based on the experimental data, the diffusion coefficient of the PMMA was calculated using Fick’s law. After calculating the diffusion coefficient in the range of the experiment, the diffusion coefficient model was employed using the least-squares method. Subsequently, the model was validated by comparing the obtained results with those in the literature, and the overall trend was found to be consistent. Therefore, it was confirmed that there were slight differences between the diffusion coefficient obtained using only Fick's equation and the value using by a different method.

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Section: Introductionmentioning

confidence: 99%

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Kim

Ryu

et al. 2022

Polymers

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“…25 In some studies about the polymer foaming processes, the measurements of the solubility and diffusivity of the gases as blowing agents in the polymer were performed prior to the foaming process. [26][27][28] The reason for this is to investigate the effect of gas solubility on its foaming properties. By increasing the gas solubility and diffusivity in polymer, the final cellular structure of produced foam was more homogeneously, due to the accessibility of more gas during the foaming process.…”

Section: Introductionmentioning

confidence: 99%

Effect of gelatin on the solubility and diffusivity of normal pentane in the poly (vinyl alcohol)/Gelatin blends

Azimi

2022

Journal of Thermoplastic Composite Materials

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In this work, we investigated the effect of Gelatin on the solubility and diffusivity of normal pentane in poly (vinyl alcohol) (PVA)/Gelatin (Gel) blends. The processibility of PVA was enhanced after adding the gelatin as plasticizer to PVA which gelatin could extend the process widow of PVA with destroying the hydrogen bonding of the polymer matrix. Therefore, the PVA/Gel blends with different concentrations were prepared by simple solution-casting method. The intermolecular suitable interactions in PVA/Gel blends were confirmed using the FTIR, XRD and SEM/EDX analyzes. In the following, the effect of various factors like temperature, pressure and gelatin content on the thermodynamic parameters like specific free volume, solubility and diffusivity was investigated. It was shown that there was a relationship between the specific free volume of the blends with the solubility and diffusivity of normal pentane in blends. The specific free volume of blends was determined by applying the PVT data and the Sanchez-Lacombe (SL) equation of state, in which it was enhanced with increasing of the temperature and gelatin in blends, respectively. Also, the solubility and diffusivity of normal pentane in samples were determined by the magnetic suspension balance (MSB) system. The results presented that the solubility and diffusivity of n-pentane improved with increasing of gelatin content in blend, pressure and temperature decrement, respectively.

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Experimental study and thermodynamic model for respective solubilities of CO₂ and ethanol for CO₂‐ethanol‐polystyrene ternary system at elevated pressure and temperature

Qian

Cao

et al. 2018

J of Applied Polymer Sci

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Foamed non-Fickian diffusion (FNFD) model for a ternary system was proposed for the first time to regress the desorption data obtained by the gravimetric method. Results showed that FNFD model could accurately describe the diffusion behavior of CO 2 and ethanol out of foamed polystyrene (PS) and well predict total solubilities of CO 2 and ethanol in foamed PS. Meanwhile, Sanchez-Lacombe equation of state (S-L EoS) was adopted to calculate the respective solubilities (solubility of CO 2 in PS or solubility of ethanol in PS) and total solubilities of CO 2 and ethanol in PS for CO 2 -ethanol-PS ternary system. Results showed that the total solubility of CO 2 and ethanol obtained from S-L EoS agreed well with values obtained by FNFD model. Furthermore, the respective and total solubilities of CO 2 and ethanol at 313.15, 338.15, and 343.15 K were calculated by S-L EoS. Results indicated that in the dissolving process, ethanol would be accelerated by CO 2 to dissolve into PS, and ethanol would compete with CO 2 to dissolve into PS, simultaneously.

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Diffusion and desorption of CO₂ in foamed polystyrene film

Cited by 7 publications

References 41 publications

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Effect of gelatin on the solubility and diffusivity of normal pentane in the poly (vinyl alcohol)/Gelatin blends

Experimental study and thermodynamic model for respective solubilities of CO₂ and ethanol for CO₂‐ethanol‐polystyrene ternary system at elevated pressure and temperature

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Diffusion and desorption of CO2 in foamed polystyrene film

Cited by 7 publications

References 41 publications

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Modeling and Experiment for the Diffusion Coefficient of Subcritical Carbon Dioxide in Poly(methyl methacrylate) to Predict Gas Sorption and Desorption

Effect of gelatin on the solubility and diffusivity of normal pentane in the poly (vinyl alcohol)/Gelatin blends

Experimental study and thermodynamic model for respective solubilities of CO2 and ethanol for CO2‐ethanol‐polystyrene ternary system at elevated pressure and temperature

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Diffusion and desorption of CO₂ in foamed polystyrene film

Experimental study and thermodynamic model for respective solubilities of CO₂ and ethanol for CO₂‐ethanol‐polystyrene ternary system at elevated pressure and temperature