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

Research output: Contribution to journalArticlepeer-review

125 Citations (SciVal)

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 languageEnglish
Pages (from-to)3776-3782
JournalMacromolecules
Volume38
Issue number9
DOIs
Publication statusPublished - 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)

Subject classification (UKÄ)

  • Chemical Sciences

Fingerprint

Dive into the research topics of 'Free volume and interstitial mesopores in silica filled poly(I-trimethylsilyl-l-propyne) nanocomposites'. Together they form a unique fingerprint.

Cite this