Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites
(2005) In Macromolecules 38(9). p.3776-3782- 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.... (More)
- 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/152536
- author
- Winberg, Petra LU ; Desitter, K ; Dotremont, C ; Mullens, S ; Vankelecom, I F J and Maurer, Frans LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Macromolecules
- volume
- 38
- issue
- 9
- pages
- 3776 - 3782
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000228738600035
- scopus:18744405120
- ISSN
- 0024-9297
- DOI
- 10.1021/ma047369j
- language
- English
- LU publication?
- yes
- additional info
- 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)
- id
- 9e7dcc4b-24cb-436a-ac11-6bb18fece115 (old id 152536)
- date added to LUP
- 2016-04-01 11:55:23
- date last changed
- 2022-02-10 23:25:50
@article{9e7dcc4b-24cb-436a-ac11-6bb18fece115, 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 = {{Winberg, Petra and Desitter, K and Dotremont, C and Mullens, S and Vankelecom, I F J and Maurer, Frans}}, issn = {{0024-9297}}, language = {{eng}}, number = {{9}}, pages = {{3776--3782}}, publisher = {{The American Chemical Society (ACS)}}, series = {{Macromolecules}}, title = {{Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites}}, url = {{http://dx.doi.org/10.1021/ma047369j}}, doi = {{10.1021/ma047369j}}, volume = {{38}}, year = {{2005}}, }