BS ISO 3387:2020
$102.76
Rubber. Determination of crystallization effects by hardness measurements
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 18 |
This document specifies a test based on hardness measurements for determining the progressive stiffening of rubber with time, caused by crystallization. It is limited to materials having an initial hardness at a test temperature of from 10 IRHD to 85 IRHD.
The method is applicable to raw, unvulcanized (compounded) and vulcanized rubber. It is mainly of interest for rubber with a marked crystallization tendency at temperatures experienced in cold climates, such as chloroprene and natural rubber.
The method is not applicable to fast-crystallizing materials which crystallize to a considerable degree within the timespan of 15 min used for conditioning at test temperature.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 6 | Foreword |
| 7 | 1 Scope 2 Normative references 3 Terms and definitions 4 Principle |
| 8 | 5 Apparatus 6 Calibration 7 Test pieces 7.1 Dimensions |
| 9 | 7.2 Preparation 7.2.1 Vulcanized rubber 7.2.2 Raw and unvulcanized rubber 7.3 Conditioning 7.3.1 Time-interval between vulcanization and testing 7.3.2 Decrystallization and conditioning |
| 10 | 8 Temperature and duration of test 8.1 Temperature 8.2 Duration 9 Procedure 9.1 Hardness measurement |
| 11 | 9.2 Original hardness 9.3 Initial hardness at test temperature 9.4 Hardness increase due to crystallization 10 Expression of results |
| 13 | 11 Test report |
| 15 | Annex A (normative) Calibration schedule |
| 17 | Bibliography |
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