Natural Rubber (NR)
Natural rubber is produced from the latex of the Hevea
brasiliensis,and the chemical name of this polymer is
polyisoprene. Polyisoprene also can be synthesized by
polymerization from its monomer isoprene. Natural rubber
possesses many excellent physical properties including
high resilience and strength and good abrasion
resistance. The defects are like SBR, having poor
resistance to hydrocarbon oil and not suitable in UV,
oxygen, ozone because of the double bond in the polymer
backbone. But its poor weathering resistance can be
modified by special additive.
Cure system - Sulfur-Cured
Standard NR compounds are sulfur-cured.
Other Common Variations
• NR is usually mixed with SBR and BR and applied in
tire productions.
General Information
ASTM D 1418 Designation: NR
ISO/DIN 1629 Designation: NR
ASTM D2000 / SAE J 200 Codes: AA
Standard Color(s): Black
Hardness Range: 40
to 90 Shore A
Relative Cost: Low
Service Temperatures
Standard Low Temperature: -50°C
/ -58°F
Standard High Temperature: 70°C
/ 158°F
Performs Well In... |
Doesn't Perform Well In... |
|
-
Ozone
-
Petroleum oils
-
Aromatic, aliphatic, or halogenated
hydrocarbons
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