BS 2782-1.135(1993) : 1993 AMD 10349
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
METHODS OF TEST PLASTICS - THERMAL PROPERTIES - DETERMINATION OF THE TIME-TEMPERATURE LIMITS AFTER PROLONGED EXPOSURE TO HEAT
15-05-1999
23-11-2012
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 line based on sample calculation
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