NR

Natural Rubber (NR)

Natural rubber is produced ____ the latex of the _____ brasiliensis,and the chemical name __ this polymer is polyisoprene. ____________ also can be synthesized __ polymerization from its monomer ________. Natural rubber possesses many _________ physical properties including high __________ and strength and good ________ resistance. The defects are ____ SBR, having poor resistance __ hydrocarbon oil and not ________ in UV, oxygen, ozone _______ of the double bond __ the polymer backbone. But ___ poor weathering resistance can __ modified by special additive.

Cure system - Sulfur-Cured
Standard NR compounds ___ sulfur-cured.

Other Common Variations
• NR is _______ mixed with SBR and __ and applied in tire ___________.

General Information

ASTM D 1418 Designation: NR
ISO/DIN 1629 Designation: NR
ASTM D2000 / SAE _ 200 Codes: AA 
Standard Color(s): Black
Hardness Range:  40 to 90 Shore _
Relative Cost: Low
Service Temperatures

Standard Low Temperature: -50°C / -58°F
Standard High Temperature: 70°C / 158°F