Gummi
Bestemmelse af krystallisationseffekten
ved hj?lp af h?rdhedsm?ling
Rubbers — Determination of crystallization effects by hardness measurements
This International Standard specifies a test based on hard-ness measurements for determining the progressive stiff-ening of rubber with time, caused by crystallization. It is limited to materials having an initial hardness at test temperature of 10 to 85 IR HD.
The method is applicable to raw, unvulcanized (com-pounded), and vulcanized rubber. It is mainly of interest for rubber with a marked crystallization tendency at temperatures experienced in cold climates, such as, for instance, chloroprene and natural rubber.
The method is not applicable to fast-crystallizing materiais which crystallize to a considerable degree within the time-span of 15 min used for conditioning at test temperature.
DS/ISO 3387:1982 history
1982DS/ISO 3387:1982 Rubber. Determination of crystallization effects by hardness measurements