High transport parameters and free volume of perfluorodioxole copolymers

Alentiev, A. Yu.; Yampolskii, Yu. P.; Shantarovich, V. P.; Nemser, Stuart; Platè, N.A.

doi:10.1016/s0376-7388(96)00272-4

Cited by 160 publications

(164 citation statements)

References 20 publications

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“…It can also be noted that here bimodal size distribution of free volume is observed, which is typical of other highly permeable polymers [44,45]. In alkylsubstituted APNB, an increase in the length of the side group is accompanied by certain decreases in the size of FVEs.…”

Section: Structure and Free Volumesupporting

confidence: 62%

Norbornene Polymers as Materials for Membrane Gas Separation

Yampolskii

2010

Comprehensive Membrane Science and Engineering

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Section: Structure and Free Volumesupporting

confidence: 62%

Norbornene Polymers as Materials for Membrane Gas Separation

Yampolskii

2010

Comprehensive Membrane Science and Engineering

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“…These perfluoropolymers are amorphous and solvent-processable, resulting in relatively high gas permeability and the feasibility to process them by solution casting and coating methods used in the membrane industry [3]. The gas transport properties of these commercial perfluoropolymers have been studied extensively over the past 25 years [4][5][6][7][8][9][10][11][12][13]. The perfluoropolymers have unique gas separation properties and in some cases they exceed the selectivitypermeability upper bound relationship originally described by Robeson [14].…”

Section: Introductionmentioning

confidence: 99%

Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene

Fang

Okamoto

Koike

et al. 2016

Journal of Fluorine Chemistry

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A B S T R A C TSeveral families of hydrocarbon polymers (polysulfones, polycarbonates, cellulose acetates, polyamides, and polyimides) have been established as common industrial gas separation membranes over the past three decades. Fluoropolymer membranes have found commercial use because of their unique gas separation properties in addition to their extraordinary chemical resistance and thermo-oxidative stability. To date, studies of gas transport in fluoropolymers have been limited largely to variants of the commercially available perfluoropolymers: Teflon 1 AF, Cytop TM , and Hyflon 1 AD. Here, we describe gas transport in composite membranes fabricated from copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxolane) (PFMDD) and chlorotrifluoroethlyene (CTFE). This poly(PFMDD-co-CTFE)-based membranes have far superior gas separation performance compared to the commercial perfluoropolymers for a number of gas pairs, including H 2 /CH 4 , He/CH 4 , and CO 2 /CH 4 . The gas separation performance of the membranes depends strongly on the copolymer composition. Increasing the amount of CTFE up to 30 mol % in the copolymer increases the membrane selectivity and reduces permeance. The membranes based on 70 mol% PFMDD-30 mol% CTFE poly(PFMDD-co-CTFE) show H 2 /CH 4 and He/CH 4 selectivities of 210 and 480, respectively, values that far exceed those possible with the known commercial perfluoropolymers.

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“…It should be noted that several members of wellestablished classes of nonnetwork polymers can possess significant intrinsic microporosity as demonstrated by very fast gas permeabilities (e.g., polyacetylenes [24][25][26], fluorinated polymers [27][28][29], polynorbornanes [30,31], and polyimides [32]), and these are exploited in the polymer membrane field where they are more commonly described as high free volume or ultrapermeable polymers [33]. However, with the exception of some polyimides that have structural similarities to the PIMs (i.e., those termed PIM polyimides), these polymers will only be dealt with indirectly when comparisons of their properties with those of PIMs are instructive.…”

Section: Introductionmentioning

confidence: 99%

Polymers of Intrinsic Microporosity

McKeown

2012

ISRN Materials Science

179

136

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This paper focuses on polymers that demonstrate microporosity without possessing a network of covalent bonds-the so-called polymers of intrinsic microporosity (PIM). PIMs combine solution processability and microporosity with structural diversity and have proven utility for making membranes and sensors. After a historical account of the development of PIMs, their synthesis is described along with a comprehensive review of the PIMs that have been prepared to date. The important methods of characterising intrinsic microporosity, such as gas absorption, are outlined and structure-property relationships explained. Finally, the applications of PIMs as sensors and membranes for gas and vapour separations, organic nanofiltration, and pervaporation are described.

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High transport parameters and free volume of perfluorodioxole copolymers

Cited by 160 publications

References 20 publications

Norbornene Polymers as Materials for Membrane Gas Separation

Norbornene Polymers as Materials for Membrane Gas Separation

Gas separation membranes prepared with copolymers of perfluoro(2-methylene-4,5-dimethyl-1,3-dioxlane) and chlorotrifluoroethylene

Polymers of Intrinsic Microporosity

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