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http://hdl.handle.net/1942/11935
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DC Field | Value | Language |
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dc.contributor.author | CLAES, Stan | - |
dc.contributor.author | Vandezande, Pieter | - |
dc.contributor.author | MULLENS, Steven | - |
dc.contributor.author | VAN BAEL, Marlies | - |
dc.contributor.author | Maurer, Frank H. J. | - |
dc.date.accessioned | 2011-05-12T14:46:56Z | - |
dc.date.available | NO_RESTRICTION | - |
dc.date.available | 2011-05-12T14:46:56Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | MACROMOLECULES, 44(8). p. 2766-2772 | - |
dc.identifier.issn | 0024-9297 | - |
dc.identifier.uri | http://hdl.handle.net/1942/11935 | - |
dc.description.abstract | The free volume changes of poly[1-(trimethyl-silyl)-1-propyne] (PTMSP) treated in supercritical CO2 (scCO(2)) were investigated with positron annihilation lifetime spectroscopy (PALS). CO2 is known to plasticize and increase the free volume size of a broad range of polymers. In this work dense PTMSP films were treated with scCO(2) under different pressures and temperatures, resulting in the enlargement of the characteristic channel-like holes (R-3) and the larger free volume cages (R-4) up to 39% and 19%, respectively. The free volume enlargement was found to have a relaxation time of similar to 30 years. At higher temperatures (110-150 degrees C), the o-Ps intensities and gel permeation chromatography (GPC) data revealed chemical changes of the scCO(2)-treated polymer due to the onset of PTMSP's degradation. However, at lower temperatures (40-70 degrees C), significant free volume cavity size increases to 25% for R-3 and 9% for R-4 were also observed. | - |
dc.description.sponsorship | S. Claes acknowledges VITO for a grant as doctoral research fellow. Anne-Marie De Wilde, Walter Adriaenssens, and Robert Carleer are acknowledged for their help with the TGA, scCO<INF>2</INF> treatment, and GPC measurements, respectively. | - |
dc.language.iso | en | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Free Volume Expansion of Poly[1-(trimethylsilyl)-1-propyne] Treated in Supercritical Carbon Dioxide As Revealed by Positron Annihilation Lifetime Spectroscopy | - |
dc.type | Journal Contribution | - |
dc.identifier.epage | 2772 | - |
dc.identifier.issue | 8 | - |
dc.identifier.spage | 2766 | - |
dc.identifier.volume | 44 | - |
local.format.pages | 7 | - |
local.bibliographicCitation.jcat | A1 | - |
dc.description.notes | [Claes, Stan; Vandezande, Pieter; Mullens, Steven] Flemish Inst Technol Res VITO, B-2400 Mol, Belgium. [Claes, Stan; Van Bael, Marlies K.] Hasselt Univ, Lab Inorgan & Phys Chem, Inst Mat Res, B-3590 Diepenbeek, Belgium. [Van Bael, Marlies K.] IMEC VZW, Div IMOMEC, B-3590 Diepenbeek, Belgium. [Maurer, Frans H. J.] Lund Univ, Dept Chem, SE-22100 Lund, Sweden. stan.claes@vito.be; frans.maurer@polymat.lth.se | - |
local.type.refereed | Refereed | - |
local.type.specified | Article | - |
dc.bibliographicCitation.oldjcat | A1 | - |
dc.identifier.doi | 10.1021/ma1029345 | - |
dc.identifier.isi | 000289593200046 | - |
item.contributor | CLAES, Stan | - |
item.contributor | Vandezande, Pieter | - |
item.contributor | MULLENS, Steven | - |
item.contributor | VAN BAEL, Marlies | - |
item.contributor | Maurer, Frank H. J. | - |
item.fulltext | No Fulltext | - |
item.validation | ecoom 2012 | - |
item.fullcitation | CLAES, Stan; Vandezande, Pieter; MULLENS, Steven; VAN BAEL, Marlies & Maurer, Frank H. J. (2011) Free Volume Expansion of Poly[1-(trimethylsilyl)-1-propyne] Treated in Supercritical Carbon Dioxide As Revealed by Positron Annihilation Lifetime Spectroscopy. In: MACROMOLECULES, 44(8). p. 2766-2772. | - |
item.accessRights | Closed Access | - |
crisitem.journal.issn | 0024-9297 | - |
crisitem.journal.eissn | 1520-5835 | - |
Appears in Collections: | Research publications |
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