Solubility of carbon dioxide in polymers by the quartz crystal microbalance technique

Aubert, J.

doi:10.1016/s0896-8446(97)00033-8

Cited by 88 publications

(79 citation statements)

References 12 publications

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“…three times larger than that of PS at the same temperature and pressure condition, 40 8C and 10 MPa. [25] Similar results were obtained by other researches at 35 8C. [26] Thus, it could be considered that the possibility of bubble nucleation in PMMA is larger than that in PS at this condition.…”

Section: Introductionsupporting

confidence: 77%

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment

Taki

Waratani

Ohshima

2008

Macro Materials & Eng

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Ordered nanowells with diameters of ca. 40 nm and depth of 1–2 nm were prepared on a poly(methyl methacrylate) (PMMA) spherical domain, which was exposed on the polystyrene‐block‐poly(methyl methacrylate) (PS‐b‐PMMA) copolymer thin film. The PS‐b‐PMMA film formed spherical PMMA domains after the film was annealed above the order–disorder transition temperature. CO2 was dissolved into the PS‐b‐PMMA thin film at 8.6 MPa and at a temperature of 20 °C. The release of CO2‐pressure at the same temperature created the nanowell on the PMMA domain. The temperature and pressure to create nanowells in the PMMA domain affected the possibility of nanowell's formation.magnified image

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Section: Introductionsupporting

confidence: 77%

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment

Taki

Waratani

Ohshima

2008

Macro Materials & Eng

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“…When CO 2 is raised above its critical point, its physicochemical properties can be continuously tuned between vapour-like and liquid-like limits by varying the system pressure and/or temperature. Moreover, scCO 2 has been widely used in polymer processing (Kazarian, 2000;Nalawade et al, 2006) as it is possible to dissolve large quantities of CO 2 in a variety of polymers (Aubert, 1998;Sato et al, 1999). This brings about the swelling and the plasticization of the polymer, inducing changes in mechanical and physical properties.…”

Section: Introductionmentioning

confidence: 99%

Residence time distribution of a pharmaceutical grade polymer melt in a single screw extrusion process

Nikitine

Rodier

Sauceau

et al. 2009

Chemical Engineering Research and Design

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a b s t r a c tThe residence time distribution (RTD) of a flowing polymer through a single screw extruder was studied. This extruder allows injecting supercritical carbon dioxide (scCO 2 ) used as physical foaming agent. The tested material is Eudragit E100, a pharmaceutical polymer. RTD was measured at various operating conditions and a model describing RTD has been developed. High screw speed or high temperature implies short residence time, but these parameters do not have the same effect on polymer flow. In the flow rate range studied, scCO 2 has no significant influence. A mathematical model consisting of a plug flow reactor in series with a continuous stirred tank reactor (CSTR) cross-flowing with a dead volume fitted well the experimental data.

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“…Literature data on the sorption of carbon dioxide into polymers refer various apparatus and methods to perform the measurements. The use of a quartz-crystal microbalance and a gravimetric method or a barometric method are the most commonly used [11,12]. Transmission IR spectroscopy has also been used to measure the sorption of polymers [13,14,24].…”

Section: Introductionmentioning

confidence: 99%

Sorption and diffusion of dense carbon dioxide in a biocompatible polymer

Duarte

Martins

Coimbra

et al. 2006

The Journal of Supercritical Fluids

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Mass sorption and diffusion coefficients in one acrylate biocompatible copolymer contacted with supercritical (sc) carbon dioxide are reported. Equilibrium solubility of dense carbon dioxide in poly(methylmethacrylate-co-ethylhexylacrylate-co-ethyleneglycoldimethacrylate) (P(MMA-EHA-EGDMA)) was studied by a gravimetric method in a temperature range from 308 to 323 K and a pressure range from 10.0 to 20.0 MPa. The cross-linked copolymer presented Fickian behavior and Fick's diffusion model was applied to determine the amount of carbon dioxide present and the diffusion coefficients. Diffusion coefficients for the sorption under supercritical conditions and desorption at ambient conditions were determined and compared. Samples of P(MMA-EHA-EGDMA) with different thickness were used for comparison of the maximum sorption degree. Polymerization conditions were also varied in order to evaluate the influence of the molecular weight of the copolymer in the CO 2 sorption process. To investigate the possibility of impregnating this acrylate copolymer with an anti-inflammatory drug, a preliminary experiment was performed.

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Solubility of carbon dioxide in polymers by the quartz crystal microbalance technique

Cited by 88 publications

References 12 publications

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment

Residence time distribution of a pharmaceutical grade polymer melt in a single screw extrusion process

Sorption and diffusion of dense carbon dioxide in a biocompatible polymer

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Solubility of carbon dioxide in polymers by the quartz crystal microbalance technique

Cited by 88 publications

References 12 publications

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO2 Treatment

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO2 Treatment

Residence time distribution of a pharmaceutical grade polymer melt in a single screw extrusion process

Sorption and diffusion of dense carbon dioxide in a biocompatible polymer

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Product

Resources

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Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment

Preparation of Nanowells on a PS‐b‐PMMA Copolymer Thin Film by CO₂ Treatment