Equilibrium sorption of ethylene in polyethylene: Experimental study and PC-SAFT simulations

Chmelař, Josef; Smolná, Klára; Podivinská, Martina; Maršálek, Jiří; Košek, Juraj

doi:10.1016/j.polymer.2015.01.012

Cited by 26 publications

(58 citation statements)

References 48 publications

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“…As seen in Figure , the extent of swelling increases with the increasing penetrant molecular weight. These results are in a good agreement with that measured by Moore and Wanke and the trends follow the sorption isotherms measured by gravimetric apparatus shown in Figure …”

Section: Resultssupporting

confidence: 92%

“…These trends correspond to the sorption results because the solubility of penetrants increases with the increasing amorphous phase content. Also the linear dependence of V/V 0 on ethylene pressure corresponds to the linear sorption isotherms presented in our previous article …”

Section: Resultssupporting

confidence: 58%

“…The temperature dependence of swelling due to ethylene sorption was also investigated. According to the sorption theory, the decreasing trend of swelling with temperature was expected . However, this trend was not observed.…”

Section: Resultsmentioning

confidence: 95%

“…Gravimetry is a very reliable and precise method for studies of sorption and desorption processes in porous and compact polymers. The sorption experiments are described in detail in our previous article . It was already shown that swelling has to be considered when correcting the gravimetric sorption data for buoyancy .…”

Section: Resultsmentioning

confidence: 99%

“…Many articles have been published on the solubilities and diffusivities of low‐molecular weight penetrants in polyolefins, especially in systems relevant to gas‐phase ethylene polymerization . Some of them have addressed the swelling phenomenon with the focus on correcting the sorption or diffusion data for volume changes.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Swelling of polyethylene particles and its relation to sorption equilibria under gas‐phase polymerization conditions

Podivinská

Jindrová

Chmelař

et al. 2017

J of Applied Polymer Sci

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The attempts to predict the swelling of semicrystalline polyolefins using equations of state have not been successful so far and the few conducted experimental investigations have been limited to a narrow range of samples and conditions. This article presents a systematic video‐microscopic study of the swelling induced in various grades of PE particles by the sorption of ethylene and co‐monomers (propylene, 1‐hexene) at condition relevant to gas‐phase polymerization. Based on experimental data for various PE densities, the swelling factor H was evaluated, which enables the prediction of PE swelling by ethylene. The swelling data were compared with the corresponding gravimetrically measured sorption isotherms. In the case of ethylene and propylene sorption, the swelling significantly influences the evaluation of sorption isotherms. Conversely, the effect of swelling was negligible for higher hydrocarbons. The observed impact of swelling on the sorption is discussed based on the evaluated partial molar volumes of penetrants. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45035.

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Section: Resultssupporting

confidence: 92%

Section: Resultssupporting

confidence: 58%

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Swelling of polyethylene particles and its relation to sorption equilibria under gas‐phase polymerization conditions

Podivinská

Jindrová

Chmelař

et al. 2017

J of Applied Polymer Sci

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Multiscale modelling of multizone gas phase propylene (co)polymerization reactors—A comprehensive review

et al. 2022

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Catalysts and polymerization processes have evolved over the years. Such significant developments have allowed producers to broaden the range of polymer microstructure and process productivity, thereby making it possible to offer a wide range of end-use properties at a reasonably low cost. However, these advantages in catalyst performance and reactor operation require that we understand as much as possible about reactor operation in the broadest sense. In addition to the fundamental experimental study of polymer chemistry, this means that one needs to develop complete, robust process models. The present paper provides a rapid overview of recent developments in various gas phase propylene (co)polymerization reactors in use today, concentrating on multizone gas phase polypropylene reactors: i.e.,

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A Thermodynamic Simulation Package for Catalytic Polyolefin Reactors: Development and Applications

Alizadeh

Touloupidis

Soares

2022

Macro Reaction Engineering

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A thermodynamic simulation package is developed for the catalytic polymerization of olefins in autoclave slurry, loop slurry, gas‐phase, and autoclave solution reactors. The number of components in the reactors may vary from two to six. The simulator uses the Sanchez–Lacombe theory, one of the major thermodynamic models in the polymer industry. Step‐by‐step instructions on how to specify the system, derive and solve the resulting nonlinear equations, and estimate the required thermodynamic properties are given. The software is used to describe ethylene/1‐hexene copolymerizations with hydrogen in different reactors under industrial conditions. These simulations demonstrate why thermodynamic effects must be included in olefin polymerization models.

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Equilibrium sorption of ethylene in polyethylene: Experimental study and PC-SAFT simulations

Cited by 26 publications

References 48 publications

Swelling of polyethylene particles and its relation to sorption equilibria under gas‐phase polymerization conditions

Swelling of polyethylene particles and its relation to sorption equilibria under gas‐phase polymerization conditions

Multiscale modelling of multizone gas phase propylene (co)polymerization reactors—A comprehensive review

A Thermodynamic Simulation Package for Catalytic Polyolefin Reactors: Development and Applications

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