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- W1971622984 abstract "The free volume sizes and interstitial mesopore sizes in poly(1-trimethylsilyl-1-propyne) (PTMSP)/silica nanocomposites and the correlation between nitrogen permeability and cavity sizes were studied with positron annihilation lifetime spectroscopy (PALS) at filler concentrations between 0 and 50 wt %. A bimodal free volume distribution was observed for PTMSP, and the size of the larger free volume cavities was significantly increased upon addition of hydrophobic fumed silica. Nanometer-sized interstitial cavities in filler agglomerates were observed in all PTMSP/fumed silica nanocomposites and in neat hydrophobic fumed silica. The radius of these interstitial mesopores in the nanocomposites decreased with decreasing filler concentration. A strong correlation between nitrogen permeability and the volume of the interstitial mesopores in the nanocomposite membranes was observed." @default.
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- W1971622984 date "2005-03-30" @default.
- W1971622984 modified "2023-10-14" @default.
- W1971622984 title "Free Volume and Interstitial Mesopores in Silica Filled Poly(1-trimethylsilyl-1-propyne) Nanocomposites" @default.
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- W1971622984 doi "https://doi.org/10.1021/ma047369j" @default.
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