Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites

Petra Winberg; K Desitter; C Dotremont; S Mullens; I F J Vankelecom; Frans Maurer

doi:10.1021/ma047369j

Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites

Petra Winberg, K Desitter, C Dotremont, S Mullens, I F J Vankelecom, Frans Maurer

Centre for Analysis and Synthesis

Research output: Contribution to journal › Article › peer-review

Abstract

The free volume sizes and interstitial mesopore sizes in poly(l-trimethylsilyl-l-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.

Original language	English
Pages (from-to)	3776-3782
Journal	Macromolecules
Volume	38
Issue number	9
DOIs	https://doi.org/10.1021/ma047369j
Publication status	Published - 2005

Bibliographical note

The information about affiliations in this record was updated in December 2015.
The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)

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Chemical Sciences

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10.1021/ma047369j

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title = "Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites",

abstract = "The free volume sizes and interstitial mesopore sizes in poly(l-trimethylsilyl-l-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.",

author = "Petra Winberg and K Desitter and C Dotremont and S Mullens and Vankelecom, {I F J} and Frans Maurer",

note = "The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)",

year = "2005",

doi = "10.1021/ma047369j",

language = "English",

volume = "38",

pages = "3776--3782",

journal = "Macromolecules",

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publisher = "The American Chemical Society (ACS)",

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TY - JOUR

T1 - Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites

AU - Winberg, Petra

AU - Desitter, K

AU - Dotremont, C

AU - Mullens, S

AU - Vankelecom, I F J

AU - Maurer, Frans

N1 - The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Polymer and Materials Chemistry (LTH) (011001041)

PY - 2005

Y1 - 2005

N2 - The free volume sizes and interstitial mesopore sizes in poly(l-trimethylsilyl-l-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.

AB - The free volume sizes and interstitial mesopore sizes in poly(l-trimethylsilyl-l-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.

U2 - 10.1021/ma047369j

DO - 10.1021/ma047369j

M3 - Article

SN - 0024-9297

VL - 38

SP - 3776

EP - 3782

JO - Macromolecules

JF - Macromolecules

IS - 9

ER -

Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites

Abstract

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