1
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Lee JH, Kim YW, Kim DJ, Chung NK, Jung JK. Comparison of Two Methods for Measuring the Temperature Dependence of H 2 Permeation Parameters in Nitrile Butadiene Rubber Polymer Composites Blended with Fillers: The Volumetric Analysis Method and the Differential Pressure Method. Polymers (Basel) 2024; 16:280. [PMID: 38276688 PMCID: PMC10821381 DOI: 10.3390/polym16020280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 01/12/2024] [Accepted: 01/18/2024] [Indexed: 01/27/2024] Open
Abstract
Hydrogen uptake/diffusivity in nitrile butadiene rubber (NBR) blended with carbon black (CB) and silica fillers was measured with a volumetric analysis method in the 258-323 K temperature range. The temperature-dependent H2 diffusivity was obtained by assuming constant solubility with temperature variations. The logarithmic diffusivity decreased linearly with increasing reciprocal temperature. The diffusion activation energies were calculated with the Arrhenius equation. The activation energies for NBR blended with high-abrasion furnace CB and silica fillers increased linearly with increasing filler content. For NBR blended with medium thermal CB filler, the activation energy decreased with increasing filler content. The activation energy filler dependency is similar to the glass transition temperature filler dependency, as determined with dynamic mechanical analysis. Additionally, the activation energy was compared with that obtained by the differential pressure method through permeability temperature dependence. The same activation energy between diffusion and permeation in the range of 33-39 kJ/mol was obtained, supporting the temperature-independent H2 solubility and H2 physisorption in polymer composites.
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Affiliation(s)
- Ji Hun Lee
- Hydrogen Energy Materials Research Team, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea; (J.H.L.); (Y.W.K.); (D.J.K.)
- Department of Measurement Science, University of Science and Technology, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
| | - Ye Won Kim
- Hydrogen Energy Materials Research Team, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea; (J.H.L.); (Y.W.K.); (D.J.K.)
- Department of Material Science and Engineering, Chungnam National University, 99, Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea
| | - Do Jung Kim
- Hydrogen Energy Materials Research Team, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea; (J.H.L.); (Y.W.K.); (D.J.K.)
| | - Nak Kwan Chung
- Hydrogen Energy Materials Research Team, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea; (J.H.L.); (Y.W.K.); (D.J.K.)
| | - Jae Kap Jung
- Hydrogen Energy Materials Research Team, Korea Research Institute of Standards and Science, Daejeon 34113, Republic of Korea; (J.H.L.); (Y.W.K.); (D.J.K.)
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2
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Wang J, Li J, Sun S, Dong H, Wu L, Zhao E, He F, Ma X, Zhao YS. Revealing molecular diffusion dynamics in polymer microspheres by optical resonances. SCIENCE ADVANCES 2023; 9:eadf1725. [PMID: 37163586 PMCID: PMC10171802 DOI: 10.1126/sciadv.adf1725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Understanding the diffusion of small molecules in polymer microsystems is of great interest in diverse fundamental and industrial research. Despite the rapidly advancing optical imaging and spectroscopic techniques, entities under investigation are usually limited to flat films or bulky samples. We demonstrate a route to in situ detection of diffusion dynamics in polymer micro-objects by means of optical whispering-gallery mode resonances. Through mode tracking, interactions between solvent molecules and polymer microspheres, including sorption, diffusion, and swelling can be quantitatively analyzed. A turning point of mode response is observed, while the diffusion exceeds the sub-wavelength-thick outermost layer as the radial extent of resonances and starts penetrating the inner core. The estimated solubility in the glassy polymer is consistent with the predicted value using Flory-Huggins theory. Besides, the non-Fickian contribution is analyzed in such a glassy polymer-penetrant system. Our work represents a high-precision and label-free approach to describing characteristics in diffusion dynamics.
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Affiliation(s)
- Jiawei Wang
- School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Jin Li
- School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Shengqi Sun
- School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Haiyun Dong
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Lan Wu
- School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Engui Zhao
- School of Science, Harbin Institute of Technology, Shenzhen 518055, China
| | - Feng He
- School of Electronic and Information Engineering, Harbin Institute of Technology, Shenzhen 518055, China
| | - Xing Ma
- School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055 China
| | - Yong Sheng Zhao
- Key Laboratory of Photochemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
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3
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Dounya M, Maschke U, Bouchikhi N, Ziani Chérif H, Bedjaoui-Alachaher L. Characterization of swelling behavior and elastomer properties of acrylate polymers containing 2-ethylhexyl and isobornyl esters. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-022-04491-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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4
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Huang Q, Hassager O, Madsen J. Spatial Radical Distribution in Fractured Polymer Glasses and Melts Visualized Using a Profluorescent Nitroxide Probe. Macromolecules 2022. [DOI: 10.1021/acs.macromol.2c01594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qian Huang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University, 610065Chengdu, China
- Danish Polymer Centre, Department of Chemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Ole Hassager
- Danish Polymer Centre, Department of Chemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
| | - Jeppe Madsen
- Danish Polymer Centre, Department of Chemical Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark
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5
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Alcohol Diffusion in Alkali-Metal-Doped Polymeric Membranes for Using in Alkaline Direct Alcohol Fuel Cells. MEMBRANES 2022; 12:membranes12070666. [PMID: 35877868 PMCID: PMC9318451 DOI: 10.3390/membranes12070666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 06/25/2022] [Accepted: 06/27/2022] [Indexed: 11/17/2022]
Abstract
The alcohol permeability of anion exchange membranes is a crucial property when they are used as a solid electrolyte in alkaline direct alcohol fuel cells and electrolyzers. The membrane is the core component to impede the fuel crossover and allows the ionic transport, and it strongly affects the fuel cell performance. The aim of this work is to compare different anion exchange membranes to be used as an electrolyte in alkaline direct alcohol fuels cells. The alcohol permeability of four commercial anion exchange membranes with different structure were analyzed in several hydro-organic media. The membranes were doped using different types of alkaline doping agents (LiOH, NaOH, and KOH) and different conditions to analyze the effect of the treatment on the membrane behavior. Methanol, ethanol, and 1-propanol were analyzed. The study was focused on the diffusive contribution to the alcohol crossover that affects the fuel cell performance. To this purpose, alcohol permeability was determined for various membrane systems. The results show that membrane alcohol permeability is affected by the doping conditions, depending on the effect on the type of membrane and alcohol nature. In general, heterogeneous membranes presented a positive correlation between alcohol permeability and doping capacity, with a lower effect for larger-size alcohols. A definite trend was not observed for homogeneous membranes.
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6
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Elder RM, Saylor DM. Predicting Solute Diffusivity in Polymers Using Time-Temperature Superposition. J Phys Chem B 2022; 126:3768-3777. [PMID: 35583328 DOI: 10.1021/acs.jpcb.2c00057] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We demonstrate a novel application of the time-temperature superposition (TTS) principle to predict solute diffusivity D in glassy polymers using atomistic molecular dynamics simulations. Our TTS approach incorporates the Debye-Waller factor ⟨u2⟩, a measure of solute caging, along with concepts from thermodynamic scaling methods, allowing us to balance contributions to the dynamics from temperature and ⟨u2⟩ using adjustable parameters. Our approach rescales the solute mean-squared displacement curves at several temperatures into a master curve that approximates the diffusive dynamics at a reference temperature, effectively extending the simulation time scale from nanoseconds to seconds and beyond. With a set of "universal" parameters, this TTS approach predicts D with reasonable accuracy in a broad range of polymer/solute systems. Using TTS greatly reduces the computational cost compared to standard MD simulations. Thus, our method offers a means to rapidly and routinely provide order-of-magnitude estimates of D using simulations.
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Affiliation(s)
- Robert M Elder
- Center for Devices and Radiological Health, FDA, Silver Spring, Maryland 20903, United States
| | - David M Saylor
- Center for Devices and Radiological Health, FDA, Silver Spring, Maryland 20903, United States
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7
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Breuer R, Hendriks S, Reinhardt N, Facklam M, Hopmann C. Modeling flow and cell formation in foam sheet extrusion of polystyrene with
CO
2
and co‐blowing agents. Part I: Material model. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25800] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Robert Breuer
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Sven Hendriks
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Nicolas Reinhardt
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Martin Facklam
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Christian Hopmann
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
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8
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Breuer R, Hendriks S, Reinhardt N, Facklam M, Hopmann C. Modeling flow and cell formation in foam sheet extrusion of polystyrene with
CO
2
and co‐blowing agents. Part
II
: Process model. POLYM ENG SCI 2021. [DOI: 10.1002/pen.25797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Robert Breuer
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Sven Hendriks
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
- Armacell Benelux S.C.S. Thimister‐Clermont Belgium
| | - Nicolas Reinhardt
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Martin Facklam
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
| | - Christian Hopmann
- Institute for Plastics Processing (IKV) in Industry and Craft at RWTH Aachen University Aachen Germany
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9
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Elder RM, Saylor DM. Relations Between Dynamic Localization and Solute Diffusion in Polymers. J Phys Chem B 2021; 125:9372-9383. [PMID: 34351152 DOI: 10.1021/acs.jpcb.1c05010] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Various public health concerns can arise from the unintended leaching of additives and impurities from polymeric medical devices or food packaging, which is directly related to each solute's diffusivity D. Both experimental and simulation methods can be used to quantify D, but slow diffusion at physiologic temperature in glassy polymers can render these approaches impractical. Here, we investigate a simulation approach with the potential to more rapidly calculate D. Specifically, we examine links between dynamic localization, characterized by the Debye-Waller factor, ⟨u2⟩, and D in a variety of polymer/solute systems using atomistic molecular dynamics (MD) simulations. Using short, high-temperature MD simulations to estimate D at physiologic temperature, we find that the relation ln D ∝ 1/⟨u2⟩ quantitatively predicts D for small solutes and produces an upper-bound estimate of D for larger solutes. Upper-bound estimates are useful in certain contexts, and we compare our results with another approach for determining upper bounds, the Piringer model, to show where each method may be useful. Then, we examine a modified relation where the Debye-Waller factor is rescaled by the mode coupling temperature Tc, which can produce better estimates of D if Tc is carefully chosen. Last, we compare our approach with several other models that relate temperature or localized dynamics with diffusivity. Although each of these approaches can be used to model D across wide temperature ranges using one or more adjustable parameters, none of them are truly predictive in glassy polymers. Further developments are needed to predict the optimal values of the adjustable parameters a priori.
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Affiliation(s)
- Robert M Elder
- Center for Devices and Radiological Health, FDA, Silver Spring, Maryland 20993, United States
| | - David M Saylor
- Center for Devices and Radiological Health, FDA, Silver Spring, Maryland 20993, United States
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10
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Welle F. Diffusion Coefficients and Activation Energies of Diffusion of Organic Molecules in Polystyrene below and above Glass Transition Temperature. Polymers (Basel) 2021; 13:polym13081317. [PMID: 33923798 PMCID: PMC8074216 DOI: 10.3390/polym13081317] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/11/2021] [Accepted: 04/13/2021] [Indexed: 11/16/2022] Open
Abstract
General Purpose Polystyrene (GPPS) and High Impact Polystyrene (HIPS) is used in packaging food as well as for technical products. Knowledge of the diffusion behavior of organic molecules in polystyrene (PS) is important for the evaluation of the diffusion and migration process. Within this study, diffusion coefficients were determined in GPPS and HIPS below and above the glass transition temperature. Diffusion coefficients were determined from desorption kinetics into the gas phase using spiked GPPS and HIPS sheets as well as from permeation kinetics through a thin GPPS film. Overall, 187 diffusion coefficients were determined in GPPS and HIPS at temperatures between 0 °C and 115 °C. From the temperature dependency of the diffusion coefficients 45 activation energies of diffusion EA and the pre-exponential factor D0 were determined. As expected, the activation energies of diffusion EA show a strong dependency from the molecular volume of the investigated substances. At the glass transition temperature, only a slight change of the diffusion behavior were observed. Based on EA and D0, prediction parameters for diffusion coefficients were established.
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Affiliation(s)
- Frank Welle
- Fraunhofer Institute for Process Engineering and Packaging (IVV) Giggenhauser Straße 35, 85354 Freising, Germany
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11
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Qiang W, Zhao L, Liu T, Liu Z, Gao X, Hu D. Systematic study of alcohols based co-blowing agents for polystyrene foaming in supercritical CO2: Toward the high efficiency of foaming process and foam structure optimization. J Supercrit Fluids 2020. [DOI: 10.1016/j.supflu.2019.104718] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Zhu Y, Welle F, Vitrac O. A blob model to parameterize polymer hole free volumes and solute diffusion. SOFT MATTER 2019; 15:8912-8932. [PMID: 31626271 DOI: 10.1039/c9sm01556f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Solute diffusion in solid polymers has tremendous applications in packaging, reservoir, and biomedical technologies but remains poorly understood. Diffusion of non-entangled linear solutes with chemically identical patterns (blobs) deviates dramatically in polymers in the solid-state (αlin > 1, Macromolecules 2013, 46, 874) from their behaviors in the molten state (αlin = 1, Macromolecules, 2007, 40, 3970). This work uses the scale invariance of the diffusivities, D, of linear probes D(N·Mblob + Manchor,T,Tg) = N-αlin(T,Tg)D(Mblob + Manchor,T,Tg) comprising N identical blobs of mass Mblob and possibly one different terminal pattern (anchor of mass Manchor) to evaluate the amounts of hole-free volume in seven polymers (aliphatic, semi-aromatic and aromatic) over a broad range of temperatures (-70 K ≤T-Tg≤ 160 K). The new parameterization of the concept of hole-free volumes opens the application of the free-volume theory (FVT) developed by Vrentas and Duda to practically any polymer, regardless of the availability of free-volume parameters. The quality of the estimations was tested with various probes including n-alkanes, 1-alcohols, n-alkyl acetates, and n-alkylbenzene. The effects of enthalpic and entropic effects of the blobs and the anchor were analyzed and quantified. Blind validation of the reformulated FVT was tested successfully by predicting from first principles the diffusivities of water and toluene in amorphous polyethylene terephthalate from 4 °C to 180 °C and in various other polymers. The new blob model would open the rational design of additives with controlled diffusivities in thermoplastics.
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Affiliation(s)
- Yan Zhu
- INRA, AgroParisTech, Université Paris-Saclay, UMR 1145 Food Processing and Engineering, 91300 Massy, France.
| | - Frank Welle
- Fraunhofer Institute for Process Engineering and Packaging IVV, Freising 85354, Germany
| | - Olivier Vitrac
- INRA, AgroParisTech, Université Paris-Saclay, UMR 1145 Food Processing and Engineering, 91300 Massy, France.
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13
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Lova P, Manfredi G, Bastianini C, Mennucci C, Buatier de Mongeot F, Servida A, Comoretto D. Flory-Huggins Photonic Sensors for the Optical Assessment of Molecular Diffusion Coefficients in Polymers. ACS APPLIED MATERIALS & INTERFACES 2019; 11:16872-16880. [PMID: 30990014 DOI: 10.1021/acsami.9b03946] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The lack of cost-effective systems for the assessment of air pollutants is a concern for health and safety in urban and industrial areas. The use of polymer thin films as label-free colorimetric sensors featuring specific interactions with pollutants would then represent a paradigm shift in environmental monitoring and packaging technologies, allowing to assess air quality, formation of byproducts in closed environment, and the barrier properties of the polymers. To this end, all-polymer distributed Bragg reflectors represent a promising approach toward a reliable and cost-effective transduction of chemical stimuli and effective colorimetric label-free selective detectors. We show selectivity attained by specific interactions between the polymer and analytes. Such interactions drive the analyte intercalation through the polymer structure and its kinetics, converting it in a dynamic optical response which is at the basis of the Flory-Huggins photonic sensors. The multivariate analyses of the response kinetics also allow distinguishing binary mixtures. Additionally, we demonstrate that such optical responses can be used to esteem the diffusion coefficients of small molecules within polymer media via simple UV-vis spectroscopy retrieving data comparable to those obtained with state-of-the-art gravimetric procedures. Last, we assess the figures of merit of the sensors in terms of lower detection limit, sensitivity, and reversibility, demonstrating that such devices can pave the way to an innovative, simple, and low-cost detection method integrable to in situ assessment of barrier polymers used for the encapsulation of optoelectronic devices, food packaging, and goods storage in general.
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14
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Karatrantos A, Composto RJ, Winey KI, Clarke N. Nanorod Diffusion in Polymer Nanocomposites by Molecular Dynamics Simulations. Macromolecules 2019. [DOI: 10.1021/acs.macromol.8b02141] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Argyrios Karatrantos
- Materials Research and Technology, Luxembourg Institute of Science and Technology, 5, Avenue des Hauts-Fourneaux, L-4362 Esch-sur-Alzette, Luxembourg
| | - Russell J. Composto
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Karen I. Winey
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Nigel Clarke
- Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, United Kingdom
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15
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Nakhle W, Wood-Adams P. Solvent diffusion in molten polystyrene under small amplitude oscillatory shear. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Martínez-López B, Gontard N, Peyron S. Worst case prediction of additives migration from polystyrene for food safety purposes: a model update. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2017; 35:563-576. [PMID: 29111879 DOI: 10.1080/19440049.2017.1402129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
A reliable prediction of migration levels of plastic additives into food requires a robust estimation of diffusivity. Predictive modelling of diffusivity as recommended by the EU commission is carried out using a semi-empirical equation that relies on two polymer-dependent parameters. These parameters were determined for the polymers most used by packaging industry (LLDPE, HDPE, PP, PET, PS, HIPS) from the diffusivity data available at that time. In the specific case of general purpose polystyrene, the diffusivity data published since then shows that the use of the equation with the original parameters results in systematic underestimation of diffusivity. The goal of this study was therefore, to propose an update of the aforementioned parameters for PS on the basis of up to date diffusivity data, so the equation can be used for a reasoned overestimation of diffusivity.
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Affiliation(s)
- Brais Martínez-López
- a National Food Institute, Food Production Engineering Research Group , Technical University of Denmark , Kongens Lyngby , Denmark
| | - Nathalie Gontard
- b UMR IATE, CIRAD, INRA , Montpellier SupAgro, Université de Montpellier , Montpellier , France
| | - Stéphane Peyron
- b UMR IATE, CIRAD, INRA , Montpellier SupAgro, Université de Montpellier , Montpellier , France
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17
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Zhou Y, Hou L, Chen H, Steenbakkers R, Sehanobish K, Wu P, Shi Q. FT-IR studies of factors affecting the diffusivity of oligo (oxyethylene) fatty acid ester in PE films: Effect of temperature, ethylene oxide chain length and base resin type. POLYMER 2017. [DOI: 10.1016/j.polymer.2017.10.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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18
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Martinez-Lopez B, Huguet P, Gontard N, Peyron S. Developing a Macroscopic Mechanistic Model for Low Molecular Weight Diffusion through Polymers in the Rubbery State. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b00233] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- B. Martinez-Lopez
- UMR
IATE, CIRAD, INRA, Montpellier SupAgro, Université de Montpellier, 2 Pl. Viala, F-34060 Montpellier, France
- National
Food Institute, Danmarks Tekniske Universitet, 2800 Kgs. Lyngby, Denmark
| | - P. Huguet
- Institut
Européen des Membranes, Université de Montpellier, 34095 Montpellier, France
| | - N. Gontard
- UMR
IATE, CIRAD, INRA, Montpellier SupAgro, Université de Montpellier, 2 Pl. Viala, F-34060 Montpellier, France
| | - S. Peyron
- UMR
IATE, CIRAD, INRA, Montpellier SupAgro, Université de Montpellier, 2 Pl. Viala, F-34060 Montpellier, France
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19
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Siebel D, Scharfer P, Schabel W. Determination of Concentration-Dependent Diffusion Coefficients in Polymer–Solvent Systems: Analysis of Concentration Profiles Measured by Raman Spectroscopy during Single Drying Experiments Excluding Boundary Conditions and Phase Equilibrium. Macromolecules 2015. [DOI: 10.1021/acs.macromol.5b02144] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David Siebel
- Thin Film Technology, Institute
of Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Philip Scharfer
- Thin Film Technology, Institute
of Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| | - Wilhelm Schabel
- Thin Film Technology, Institute
of Process Engineering, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
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20
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Martinez-Lopez B, Chalier P, Guillard V, Gontard N, Peyron S. Determination of mass transport properties in food/packaging systems by local measurement with Raman microspectroscopy. J Appl Polym Sci 2014. [DOI: 10.1002/app.40958] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Brais Martinez-Lopez
- Unité Mixte de Recherche 1208 (Agropolymer Engineering and Emerging Technologies), University of Montpellier 2, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de la Recherche Agronomique; Montpellier SupAgro Montpellier France
| | - Pascale Chalier
- Unité Mixte de Recherche 1208 (Agropolymer Engineering and Emerging Technologies), University of Montpellier 2, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de la Recherche Agronomique; Montpellier SupAgro Montpellier France
| | - Valerie Guillard
- Unité Mixte de Recherche 1208 (Agropolymer Engineering and Emerging Technologies), University of Montpellier 2, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de la Recherche Agronomique; Montpellier SupAgro Montpellier France
| | - Nathalie Gontard
- Unité Mixte de Recherche 1208 (Agropolymer Engineering and Emerging Technologies), University of Montpellier 2, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de la Recherche Agronomique; Montpellier SupAgro Montpellier France
| | - Stephane Peyron
- Unité Mixte de Recherche 1208 (Agropolymer Engineering and Emerging Technologies), University of Montpellier 2, Centre de Coopération Internationale en Recherche Agronomique pour le Développement, Institut National de la Recherche Agronomique; Montpellier SupAgro Montpellier France
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Bai R, Basser PJ, Briber RM, Horkay F. NMR Water Self-Diffusion and Relaxation Studies on Sodium Polyacrylate Solutions and Gels in Physiologic Ionic Solutions. J Appl Polym Sci 2014; 131:10.1002/app.40001. [PMID: 24409001 PMCID: PMC3882160 DOI: 10.1002/app.40001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Water self-diffusion coefficients and longitudinal relaxation rates in sodium polyacrylate solutions and gels were measured by NMR, as a function of polymer content and structure in a physiological concentration range of monovalent and divalent cations, Ca2+ and Na+. Several physical models describing the self-diffusion of the solvent were applied and compared. A free-volume model was found to be in good agreement with the experimental results over a wide range of polymer concentrations. The longitudinal relaxation rate exhibited linear dependence on polymer concentration below a critical concentration and showed non-linear behavior at higher concentrations. Both the water self-diffusion and relaxation were less influenced by the polymer in the gel state than in the uncrosslinked polymer solutions. The effect of Na+ on the mobility of water molecules was practically undetectable. By contrast, addition of Ca2+ strongly increased the longitudinal relaxation rate while its effect on the self-diffusion coefficient was much less pronounced.
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Affiliation(s)
- Ruiliang Bai
- Section on Tissue Biophysics and Biomimetics, Program in Pediatric Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
- Biophysics Program, Institute for Physical Science and Technology, University of Maryland, College Park, Maryland 20740, USA
| | - Peter J. Basser
- Section on Tissue Biophysics and Biomimetics, Program in Pediatric Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Robert M. Briber
- Department of Materials Science and Engineering, University of Maryland, College Park, Maryland 20740,USA
| | - Ferenc Horkay
- Section on Tissue Biophysics and Biomimetics, Program in Pediatric Imaging and Tissue Sciences, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
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