Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/11935
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dc.contributor.authorCLAES, Stan-
dc.contributor.authorVandezande, Pieter-
dc.contributor.authorMULLENS, Steven-
dc.contributor.authorVAN BAEL, Marlies-
dc.contributor.authorMaurer, Frank H. J.-
dc.date.accessioned2011-05-12T14:46:56Z-
dc.date.availableNO_RESTRICTION-
dc.date.available2011-05-12T14:46:56Z-
dc.date.issued2011-
dc.identifier.citationMACROMOLECULES, 44(8). p. 2766-2772-
dc.identifier.issn0024-9297-
dc.identifier.urihttp://hdl.handle.net/1942/11935-
dc.description.abstractThe 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.sponsorshipS. 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.isoen-
dc.publisherAMER CHEMICAL SOC-
dc.titleFree Volume Expansion of Poly[1-(trimethylsilyl)-1-propyne] Treated in Supercritical Carbon Dioxide As Revealed by Positron Annihilation Lifetime Spectroscopy-
dc.typeJournal Contribution-
dc.identifier.epage2772-
dc.identifier.issue8-
dc.identifier.spage2766-
dc.identifier.volume44-
local.format.pages7-
local.bibliographicCitation.jcatA1-
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.refereedRefereed-
local.type.specifiedArticle-
dc.bibliographicCitation.oldjcatA1-
dc.identifier.doi10.1021/ma1029345-
dc.identifier.isi000289593200046-
item.contributorCLAES, Stan-
item.contributorVandezande, Pieter-
item.contributorMULLENS, Steven-
item.contributorVAN BAEL, Marlies-
item.contributorMaurer, Frank H. J.-
item.fulltextNo Fulltext-
item.validationecoom 2012-
item.fullcitationCLAES, 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.accessRightsClosed Access-
crisitem.journal.issn0024-9297-
crisitem.journal.eissn1520-5835-
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