NF ISO 11346
Rubber, vulcanized or thermoplastic - Estimation of life-time and maximum temperature of use
ISO 11346:2014 specifies the principles and procedures for estimating the thermal endurance of rubbers from the results of exposure to elevated temperatures for long periods. Two approaches are specified: one using the Arrhenius relation; the other using the WLF equation. In ISO 11346:2014, the estimation of thermal endurance is based solely on the change in selected properties resulting from periods of exposure to elevated temperatures. The various properties of rubbers change at different rates on thermal ageing, hence comparisons between different rubbers can only be made using the same properties.
ISO 11346:2014 specifies the principles and procedures for estimating the thermal endurance of rubbers from the results of exposure to elevated temperatures for long periods.
Two approaches are specified: one using the Arrhenius relation; the other using the WLF equation.
In ISO 11346:2014, the estimation of thermal endurance is based solely on the change in selected properties resulting from periods of exposure to elevated temperatures. The various properties of rubbers change at different rates on thermal ageing, hence comparisons between different rubbers can only be made using the same properties.
<p>ISO 11346:2004 specifies the principles and procedures for estimating the thermal endurance of rubbers from the results of exposure to elevated temperatures for long periods.</p> <p>Two approaches are specified:</p> <ol><li>one using the Arrhenius relation;</li><li>the other using the WLF equation.</li></ol> <p>The estimation of thermal endurance is based solely on the change in selected properties resulting from periods of exposure to elevated temperatures. The various properties of rubbers change at different rates on thermal ageing, hence comparisons between different rubbers can only be made using the same properties.</p>
<p class="MsoBodyText" style="mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">This document specifies the principles and procedures for estimating the thermal endurance of rubbers from the results of exposure to elevated temperatures for long periods.</span></p> <p class="MsoBodyText" style="mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">Two approaches are specified (see Introduction):</span></p> <p class="ListContinue1" style="tab-stops: 19.85pt 39.7pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">—<span style="mso-tab-count: 1;"> </span>one using the Arrhenius equation;</span></p> <p class="ListContinue1" style="tab-stops: 19.85pt 39.7pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">—<span style="mso-tab-count: 1;"> </span>the other using the WLF equation.</span></p> <p class="MsoBodyText" style="mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt; mso-fareast-font-family: 'MS Mincho';">In this document, the estimation of thermal endurance is based solely on the change in selected properties resulting from periods of exposure to elevated temperatures. The various properties of rubbers change at different rates on thermal ageing, hence comparison between different rubbers can only be made using the same properties.</span></p>
- Avant-proposiv
- Introductionv
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1 Domaine d'application1
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2 Références normatives1
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3 Termes et définitions1
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4 Principe2
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5 Sélection des essais et de l'étuve de vieillissement2
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6 Sélection de la valeur limite2
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7 Éprouvettes2
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8 Températures3
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9 Temps d'exposition3
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10 Mode opératoire4
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11 Expression des résultats4
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12 Rapport d'essai9
- Bibliographie11
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