SN EN ISO 2578 : 1999
Current
The latest, up-to-date edition.
PLASTICS - DETERMINATION OF TIME-TEMPERATURE LIMITS AFTER PROLONGED EXPOSURE TO HEAT
12-01-2013
National foreword
Committees responsible
Introduction
Method
1 Scope
2 Normative references
3 Definitions
4 Principle
5 Choice of test
6 Choice of end-point
7 Test specimens
8 Exposure temperature
9 Ageing ovens
10 Procedure
11 Evaluation of results
12 Determination of the relative temperature index
13 Test report
Annexes
A (normative) Calculation of the regression line
B (normative) Correlation coefficient
C (informative) Recommended test schedule for primary
properties
Tables
A.1 Commonly used test temperatures, in degrees Celsius,
corresponding values in kelvins with their reciprocal and
reciprocal squared values
A.2 Sample calculation
Figures
1 Determination of the time to reach the end-point at each
temperature - Property variation
2 Thermal endurance graph - Temperature index - Halving
interval
3 Thermal endurance graph - Relative temperature index -
Halving interval
A.1 Plot of regression based on sample calculation
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