Erratum to “Swelling and impregnation of polystyrene using supercritical carbon dioxide”

Никитин, Л. Н.; Gallyamov, Marat O.; Vinokur, Rostislav; Nikolaev, A. Yu.; Said-Galiyev, E. E.; Khokhlov, Alexei R.; Jespersen, Henrik T.; Schaumburg, Kjeld

doi:10.1016/s0896-8446(03)00152-9

Cited by 9 publications

(13 citation statements)

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“…The increasing research activities in this direction are documented in the literature. [1][2][3] The adoption of carbon dioxide as a supercritical solvent has been guided strongly by ecological reasons. It has been verified experimentally that it is possible to substitute toxic organic solvents by CO 2 without reducing the yield of the process.…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of Amorphous Polystyrene in Supercritical Carbon Dioxide Studied by Reverse Nonequilibrium Molecular Dynamics Simulations

et al. 2009

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The thermal conductivity of amorphous atactic polystyrene (PS) swollen in supercritical carbon dioxide (sc CO(2)) has been investigated over wide temperature, pressure, and concentration ranges. Nonequilibrium molecular dynamics simulations with a full atomistic force field have been used to calculate the thermal conductivity of neat PS and sc CO(2) as well as of the binary system at different compositions. An analytical interpolation formula for the thermal conductivity of the binary mixture on the basis of PS and CO(2) data has been obtained. Particular attention has been paid to the implications of the quasi-degeneracy and finite-size effects in the simulated polymer system. It has been found that, in addition to the degrees of freedom per volume, the orientation of the carbon-carbon bonds in the backbone relative to the direction of the temperature gradient is important for the heat transport in PS.

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Section: Introductionmentioning

confidence: 99%

Thermal Conductivity of Amorphous Polystyrene in Supercritical Carbon Dioxide Studied by Reverse Nonequilibrium Molecular Dynamics Simulations

et al. 2009

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“…In the polymer sciences, sc-CO 2 has found many uses for impregnation, 26 preparation, 27,28 and swelling. 29 Cooper et al 30,31 have recently demonstrated the use of sc-CO 2 as a "pressure-adjustable" porogenic solvent in the production of porous poly-(methacrylate) monoliths. Thus, properties such as surface area and pore diameters of porous polymers can be manipulated through CO 2 pressure changes.…”

Section: Introductionmentioning

confidence: 99%

“…They reported that modified CO 2 could be used to extract the surfactant template from the uncalcined mesoporous silica, thus facilitating in the recycling of the surfactant. In the polymer sciences, sc-CO 2 has found many uses for impregnation, preparation, , and swelling . Cooper et al , have recently demonstrated the use of sc-CO 2 as a “pressure-adjustable” porogenic solvent in the production of porous poly(methacrylate) monoliths.…”

Section: Introductionmentioning

confidence: 99%

Pore Expansion in Mesoporous Silicas Using Supercritical Carbon Dioxide

et al. 2004

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In this paper we report the controlled expansion of pores within mesoporous silicas using supercritical carbon dioxide (sc-CO 2 ). Our method uses the tunable density of sc-CO 2 to induce the controlled swelling of the triblock copolymer surfactant templating agents, P123 (PEO 20 PPO 69 PEO 20 ) and P85 (PEO 26 PPO 39 PEO 26 ). This swelling process ultimately leads to the control of pore diameters and hexagonal spacing within the mesoporous silicas. At pressures of approximately 482 bar, pore diameters of up to 100 Å can be achieved representing a pore expansion of 54 % compared to the conventionally formed mesoporous silicas. Powder X-ray diffraction (PXRD), transmission electron microscopy (TEM) and nitrogen adsorption techniques were used to establish pore diameters, silica wall widths and the hexagonal packing of the pores within the sc-CO 2 treated mesoporous silicas. The sc-CO 2 was shown not to effect the hexagonal ordering of the silica, a distinct advantage over conventional pore swelling techniques.2

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“…The method of treatment with sc‐CO 2 and the experimental apparatus were described in previous papers . This experimental apparatus (Figure ) consists of a pressure generator that can provide CO 2 pressure up to 35 MPa (High Pressure Equipment Company, Erie, Pennsylvania, USA).…”

Section: Experimental Methodsmentioning

confidence: 99%

Microstructure relaxation process of polyhexafluoropropylene after swelling in supercritical carbon dioxide

Белов

Alentiev

Ronova

et al. 2015

J of Applied Polymer Sci

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This paper studies the process of relaxation of a polymer after swelling in supercritical carbon dioxide. Polyhexafluoropropylene (PHFP) was chosen as the object for investigation. The relaxation process was monitored by a change of the permeability coefficients for a number of gases. Thin polymeric films of PHFP were modified by different treatments: drying to a constant weight, annealing at a temperature slightly higher than the glass-transition temperature, and swelling in supercritical carbon dioxide. The permeability coefficients of six gases, He, H 2 , O 2 N 2, CO 2 , and CH 4 , were measured after each stage of the treatment. It was shown that the permeability coefficients in the films were increased by 2.4 times for He, 3.6 for H 2 , 5.9 for O 2 , 8.1 for N 2 , 6.7 for CO 2 , and 10.9 for methane. The permeability coefficients of the same gases were measured 50 days later after swelling in supercritical carbon dioxide. A decrease in the permeability coefficient demonstrated that the relaxation process had taken place. Nevertheless, the values exceeded the initial ones for annealed samples by 2.0 times for He, 2.4 for H 2 , 1.8 for O 2 , 1.7 for N 2 , 1.7 for CO 2 , and 1.3 for methane.

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Erratum to “Swelling and impregnation of polystyrene using supercritical carbon dioxide”

Cited by 9 publications

References 0 publications

Thermal Conductivity of Amorphous Polystyrene in Supercritical Carbon Dioxide Studied by Reverse Nonequilibrium Molecular Dynamics Simulations

Thermal Conductivity of Amorphous Polystyrene in Supercritical Carbon Dioxide Studied by Reverse Nonequilibrium Molecular Dynamics Simulations

Pore Expansion in Mesoporous Silicas Using Supercritical Carbon Dioxide

Microstructure relaxation process of polyhexafluoropropylene after swelling in supercritical carbon dioxide

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