Effect of polymer structure on gas transport properties of selected aromatic polyimides, polyamides and TR polymers

Smith, Zachary P.; Hernández, Guiomar; Gleason, Kristofer L.; Anand, Advaith; Doherty, Cara M.; Konstas, Kristina; Álvarez, Celedonio M.; Hill, Anita J.; Lozano, Ángel E.; Paul, Donald R; Freeman, Benny D.

doi:10.1016/j.memsci.2015.06.032

Cited by 71 publications

(33 citation statements)

References 69 publications

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“…Sorption and dilation effects have been modeled in fluorinated polyimides (6FDA-ODA,6FDA-DPX,6FDA-DAM) [183,192,193], in poly (ether sulfone) (PES) and polysulfone [185] polymers and in copolyimide polymers [188] up to high pressures. Performance and plasticization resistance of an emerging class of polymeric membrane materials called ‘thermally rearranged polymers’ [194,195,196,197,198,199,200,201,202,203,204] that are generated by thermally modifying aromatic polyimide chains, has also been investigated computationally [205,206,207,208,209,210,211] in recent years. These phenomena have been also simulated for high free volume polymers of intrinsic microporosity (PIM) [56,189,212,213].…”

Section: Mechanistic Aspects Of Sorption and Transportmentioning

confidence: 99%

Molecular Modeling Investigations of Sorption and Diffusion of Small Molecules in Glassy Polymers

Vergadou

Theodorou

2019

Membranes

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With a wide range of applications, from energy and environmental engineering, such as in gas separations and water purification, to biomedical engineering and packaging, glassy polymeric materials remain in the core of novel membrane and state-of the art barrier technologies. This review focuses on molecular simulation methodologies implemented for the study of sorption and diffusion of small molecules in dense glassy polymeric systems. Basic concepts are introduced and systematic methods for the generation of realistic polymer configurations are briefly presented. Challenges related to the long length and time scale phenomena that govern the permeation process in the glassy polymer matrix are described and molecular simulation approaches developed to address the multiscale problem at hand are discussed.

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Section: Mechanistic Aspects Of Sorption and Transportmentioning

confidence: 99%

Molecular Modeling Investigations of Sorption and Diffusion of Small Molecules in Glassy Polymers

Vergadou

Theodorou

2019

Membranes

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“…The permeability K i for species i is calculated using Ki=Qmax,ilAΔPi where Q max , i is the maximum volume flow rate (cm 3 (STP) s −1 ), l the sample thickness (cm), A the surface area (cm 2 ) through which permeation occurs and Δ P i (barg) is the difference in the partial pressure of the species i in the initial gas mixture. In some circumstances, P i can be replaced by a fugacity term reflecting the nonideality of the test fluid [66,70,71]. The fugacity can be calculated using NIST REFPROP standard reference database 23 version 9.…”

Section: Introductionmentioning

confidence: 99%

Permeation of a Range of Species through Polymer Layers under Varying Conditions of Temperature and Pressure: In Situ Measurement Methods

Craster

Jones

2019

Polymers

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Minimising the transport of corrosive reactants such as carbon dioxide, hydrogen sulfide and chloride ions to the surfaces of carbon steel pipes by the use of polymer barrier layers is of major interest in the oil and gas sector. In these applications, there is a requirement to assess the performance of these barrier layers although it is difficult to perform long-term predictions of barrier properties from the results of short-term measurements. New methodologies have been successfully developed to study the permeability of carbon dioxide (CO2) and hydrogen sulfide (H2S) through polymer layers under variable conditions of elevated temperatures of 100 °C and pressures of the order of 400 barg. In situ variation of the temperature and the inlet pressure of the gas (or gas mixture) allowed the activation energy and pressure dependence of the permeability to be determined without outgassing of the specimen. These methodologies have been applied to the measurement of the permeability of moulded polyphenylene sulfide (PPS) to supercritical CO2 in the presence of H2S. The diffusion coefficients of sodium chloride and potassium chloride through both PPS and polyether ether ketone (PEEK) at ambient temperature and pressure have also been measured.

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“…Therefore, it is necessary to conduct explorations on 2 of 9 their structure-property relationships for practical applications. Although some studies showed that the chain hardness constituted the extremely crucial factor which affects their attributes in a direct way [19][20][21][22][23], the structure-property relationships links PIs are still not well understood.…”

Section: Introductionmentioning

confidence: 99%

Mechanical, Dielectric, and Thermal Attributes of Polyimides Stemmed Out of 4, 4’–Diaminodiphenyl Ether

Zhang

Dou

et al. 2020

Crystals

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Several kinds of polyimide (PI) films stemmed out of 4, 4’–diaminodiphenyl ether, as well as various structurally various aromatic dianhydride, were prepared. The films’ mechanical, dielectric, and dynamic mechanical attributes were put under investigation. According the findings, the PI films’ performance is significantly different as a result of their diverse structure. PI’s dielectric constant and dielectric loss tangent of abides by the increasing order below: PMDA-PI>BTDA-PI>BPDA-PI. Moreover, the electric breakdown strength of BTDA-PI (478.90 kV/mm) presents a lot higher value compared to the one PMDA-PI (326.80 kV/mm) and BPDA-PI (357.07 kV/mm). In particular, BTDA-PI film possesses high electric breakdown strength about 478.90 kV/mm. In addition, PI’s glass transition temperature (Tg) are, respectively, 276 °C (BTDA-PI), and 290 °C (BPDA-PI), as well as 302 °C (PMDA-PI). Therefore, in virtue of their various structures and performances, practical applications of PI films can exert significant role in the electronics and microelectronics industries.

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Effect of polymer structure on gas transport properties of selected aromatic polyimides, polyamides and TR polymers

Cited by 71 publications

References 69 publications

Molecular Modeling Investigations of Sorption and Diffusion of Small Molecules in Glassy Polymers

Molecular Modeling Investigations of Sorption and Diffusion of Small Molecules in Glassy Polymers

Permeation of a Range of Species through Polymer Layers under Varying Conditions of Temperature and Pressure: In Situ Measurement Methods

Mechanical, Dielectric, and Thermal Attributes of Polyimides Stemmed Out of 4, 4’–Diaminodiphenyl Ether

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