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Long-term performance of a DEHP-containing NBR membrane and a plasticised PVC cable
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology, Polymeric Materials.
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2013. , 36 p.
Series
Trita-CHE-Report, ISSN 1654-1081 ; 2013:49
Keyword [en]
PVC, NBR, Long-time performance, plasticiser migration
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:kth:diva-137419ISBN: 978-91-7501-945-1 (print)OAI: oai:DiVA.org:kth-137419DiVA: diva2:678871
Presentation
2013-12-13, K2, KTH, Teknikringen 28, Stockholm, 10:00
Opponent
Supervisors
Note

QC 20131213

Available from: 2013-12-13 Created: 2013-12-13Bibliographically approved
List of papers
1. Plasticizer migration from PVC cable insulation - a case study testing different extrapolation methods
Open this publication in new window or tab >>Plasticizer migration from PVC cable insulation - a case study testing different extrapolation methods
(English)Manuscript (preprint) (Other academic)
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-136763 (URN)
Note

QS 2013

Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2013-12-13Bibliographically approved
2. Long-term performance of a DEHP-containing carbon-black-filled NBR membrane
Open this publication in new window or tab >>Long-term performance of a DEHP-containing carbon-black-filled NBR membrane
2014 (English)In: Polymer testing, ISSN 0142-9418, E-ISSN 1873-2348, Vol. 34, no 1, 25-33 p.Article in journal (Refereed) Published
Abstract [en]

A NBR membrane containing carbon black (36 wt.%) and di(2-ethylhexyl) phthalate (DEHP; 11 wt.%) that had been used at temperatures up to 45 C in pressurised air showed cracking after 2 years in service. Samples were aged in air at elevated temperatures and their mechanical properties were assessed by tensile testing, the glass transition temperature was obtained by DSC, and the DEHP content was determined by liquid chromatography. The loss of DEHP was controlled by the boundary conditions at low temperatures and the loss rate was constant at 90 C within a certain DEHP concentration range (8 to 11 wt.%). The presence of carbon black and DEHP made it impossible to determine oxidation products by infrared spectroscopy. Strain-at-break data were analysed in a way that enabled the effect of DEHP migration to be separated from the effect of thermal oxidation. This allowed extrapolation in both temperature and oxygen pressure domains of high temperature/low oxygen pressure data to the service conditions. The analysis showed that both DEHP evaporation and thermal oxidation had a significant impact on the strain-at-break, but that the latter was the more important. Data for the mechanical properties and the glass transition temperature indicated that oxidation was non-uniform with increasing depth in the specimens. This condition of the 4.5 mm thick samples meant that it was inappropriate to use the specimen Young's modulus for extrapolation purposes.

Keyword
Acrylonitrile butadiene rubber, Ageing, Di(2-ethylhexyl)phthalate, Extrapolation, Oxidation
National Category
Polymer Technologies
Identifiers
urn:nbn:se:kth:diva-136765 (URN)10.1016/j.polymertesting.2013.12.011 (DOI)000335426000005 ()2-s2.0-84892692690 (Scopus ID)
Note

QC 20140305. Updated from manuscript to article in journal.

Available from: 2013-12-09 Created: 2013-12-09 Last updated: 2017-12-06Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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Language
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