TestingRubberIntermediate
How to perform accelerated aging on Silicone Rubber?
Performance testing methods and standards for Silicone Rubber:
Physical-Mechanical Property Testing:** - Tensile Testing (ISO 37 / ASTM D412 / GB/T 528): Measures tensile strength, elongation at break, and modulus. The most fundamental mechanical property test for rubber materials. Specimens are typically dumbbell-shaped, tested at 500 mm/min. - Hardness Testing (ISO 48-4 / ASTM D2240 / GB/T 531.1): Uses Shore A or D durometer; measures indentation depth converted to hardness value. Reading time is typically 3 or 15 seconds. - Tear Strength Testing (ISO 34-1 / ASTM D624 / GB/T 529): Trouser tear or angle tear methods for evaluating tear propagation resistance.
Aging Property Testing:** - Hot Air Aging (ISO 188 / ASTM D573 / GB/T 3512): Measures property change rate after exposure at specified temperature for a defined duration; the fundamental method for evaluating material heat resistance life. - Ozone Resistance (ISO 1431-1 / ASTM D1149 / GB/T 7762): Applies static or dynamic tensile strain in an ozone environment; observes crack initiation time and severity. - Fluid Resistance (ISO 1817 / ASTM D471 / GB/T 1690): Immerses specimens in specified media; measures mass change rate, volume change rate, and property changes.
Special Property Testing:** - Compression Set (ISO 815-1 / ASTM D395 / GB/T 7759) - Low-Temperature Brittleness (ASTM D2137 / GB/T 15256) - Resilience (ISO 4662 / GB/T 1681) - Abrasion Resistance (ISO 4649 / GB/T 9867: DIN abrasion or Akron abrasion)
Recommended Testing Frequency:** - Raw material incoming inspection: Every batch - Compound quick testing (hardness, density, cure characteristics): Every batch - Finished product release testing (hardness, tensile, dimensions): Every batch - Type testing (full scope): Annually or upon formulation/process changes
Source references: 167 ·Language: en ·Difficulty: intermediate