Accelerated oxidative ageing of polypropylene fibers in aqueous medium under high oxygen pressure as studied by thermal analysis

Stabilised polypropylene fibres of 28 μm diameter have been exposed at 80 °C under 5 MPa oxygen pressure, in dry conditions, in pure water and in alkaline medium. Their residual stability is determined from the temperature T ox of the onset of the oxidation exotherm, measured by differential scannin...

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Bibliographic Details
Published inPolymer testing Vol. 23; no. 8; pp. 919 - 923
Main Authors Astruc, A., Bartolomeo, P., Fayolle, B., Audouin, L., Verdu, J.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.12.2004
Elsevier
Subjects
Accelerated ageing
Applied sciences
Exact sciences and technology
Geotextile
Oxidation
Physicochemistry of polymers
Polymer industry, paints, wood
Polypropylene
Technology of polymers
Geotextile
Oxidation
Accelerated ageing
Polypropylene
Polymer
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Summary:Stabilised polypropylene fibres of 28 μm diameter have been exposed at 80 °C under 5 MPa oxygen pressure, in dry conditions, in pure water and in alkaline medium. Their residual stability is determined from the temperature T ox of the onset of the oxidation exotherm, measured by differential scanning calorimetry at 10 K min −1 scanning rate. The time t ex to reach the characteristics of unstabilised samples ( T ox=175 °C) is of the order of 220 (dry conditions), 160 h (water) and 80 h (alkaline medium), whereas it is of the order of 750 h at 110 °C in classical tests made at atmospheric pressure. This increase of ageing rate is discussed in terms of kinetic effect of O 2 pressure and efficiency of the liquid medium to extract stabilisers.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0142-9418
1873-2348
DOI:10.1016/j.polymertesting.2004.05.002