Synthesis and gas permeation properties of poly(4-methyl-2-pentyne)

Morisato, Atsushi; Pinnau, Ingo

doi:10.1016/s0376-7388(96)00183-4

Cited by 175 publications

(143 citation statements)

References 16 publications

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“…[1][2][3][4][5] For example, poly(1-trimethylsilyl-1-propyne) (PTMSP) and poly(4-methyl-2-pentyne) (PMP) have overall FFVs of 0.29 and 0.28, respectively, which are among the highest values ever reported for dense polymer films. [3][4][5] Furthermore, the fractional amount of nonequilibrium, unrelaxed free volume is 0.20 -0.28 for PTMSP and 0.15 for PMP, higher than that in any other glassy, hydrocarbon-based polymer. 4 -8 Glassy polymers are nonequilibrium materials whose properties change gradually with time (physical aging) because of local-scale polymer chain motions that drive densification (i.e., reduction in free volume) of the material.…”

Section: Introductionmentioning

confidence: 99%

Gas permeability and hydrocarbon solubility of poly[1-phenyl-2-[p-(triisopropylsilyl)phenyl]acetylene]

Nagai

Toy

Freeman

et al. 2000

J. Polym. Sci. B Polym. Phys.

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Section: Introductionmentioning

confidence: 99%

Gas permeability and hydrocarbon solubility of poly[1-phenyl-2-[p-(triisopropylsilyl)phenyl]acetylene]

Nagai

Toy

Freeman

et al. 2000

J. Polym. Sci. B Polym. Phys.

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“…[8] Examples of such materials include rigid, kinked, shape-persistent ladder polymers, [9] and substituted polyacetylenes. [10,11] The tantalizing initial performance of polyacetylenes coupled with their physical aging challenges led to a large body of research aimed towards freezing the initial high fractional free volume state in place. One approach included the use of additives, such as nanoparticles, [12] polymer blends, [13] or microporous organic fillers (or polymers), [14] to prop open and increase transport pathways.…”

mentioning

confidence: 99%

Ending Aging in Super Glassy Polymer Membranes

et al. 2014

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Aging in super glassy polymers such as poly(trimethylsilylpropyne) (PTMSP), poly(4‐methyl‐2‐pentyne) (PMP), and polymers with intrinsic microporosity (PIM‐1) reduces gas permeabilities and limits their application as gas‐separation membranes. While super glassy polymers are initially very porous, and ultra‐permeable, they quickly pack into a denser phase becoming less porous and permeable. This age‐old problem has been solved by adding an ultraporous additive that maintains the low density, porous, initial stage of super glassy polymers through absorbing a portion of the polymer chains within its pores thereby holding the chains in their open position. This result is the first time that aging in super glassy polymers is inhibited whilst maintaining enhanced CO2 permeability for one year and improving CO2/N2 selectivity. This approach could allow super glassy polymers to be revisited for commercial application in gas separations.

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“…The synthesis method for PMP is provided in detail elsewhere [9]. The fumed silica used as filler, Cabosil TS-530, was purchased from Cabot Corporation, Germany.…”

Section: Methodsmentioning

confidence: 99%

“…PMP is less permeable, but more stable in time and especially more solvent-resistant than PTMSP, making it more attractive for use in industrial environments [9]. For this polymer, Merkel et al [10] reported an increase in permeability and simultaneously in vapor selectivity, upon incorporation of nanosized silica particles in the polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

Silica filled poly(4-methyl-2-pentyne) nanocomposite membranes: Similarities and differences with poly(1-trimethylsilyl-1-propyne)–silica systems

Sitter

Andersson

D’Haen

et al. 2008

Journal of Membrane Science

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The performance of poly(4-methyl-2-pentyne) (PMP)/silica nanocomposites was studied for membranes with a filler content between 10 and 40 wt%. An increase in permeability and a constant vapor selectivity were measured with increasing filler content. The constant selectivity was in contrast to earlier published results for silica filled poly(1-trimethylsilyl-1-propyne) (PTSMP) membranes. Therefore, a comparison between both materials was made. Free volume sizes and interstitial mesopore sizes were determined by use of positron annihilation lifetime spectroscopy (PALS) and image analysis was performed on TEM pictures of both materials. Although both materials possessed interstitial mesopores, a difference in membrane structure was noticed, explaining the difference in membrane performance.

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Synthesis and gas permeation properties of poly(4-methyl-2-pentyne)

Cited by 175 publications

References 16 publications

Gas permeability and hydrocarbon solubility of poly[1-phenyl-2-[p-(triisopropylsilyl)phenyl]acetylene]

Gas permeability and hydrocarbon solubility of poly[1-phenyl-2-[p-(triisopropylsilyl)phenyl]acetylene]

Ending Aging in Super Glassy Polymer Membranes

Silica filled poly(4-methyl-2-pentyne) nanocomposite membranes: Similarities and differences with poly(1-trimethylsilyl-1-propyne)–silica systems

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