Elastomer Properties Chart

Physical Properties	Natural Rubber NR	Styrene Butadiene SBR	Neoprene CR	Ethylene Propylene RPDM	Nitrile Butadiene NBR	Urethane	Fluro Carbons	Silicone	Butyl	Epichio- Rohydrin Eco
Polymer Spec. Gravity	0.93	0.93	1.23	0.88	1	1.05	1.4-1.9	,95	0.9	1.27-1.36
Durometer Range	30-100	30-100	15-95	30-90	30-100	20-100	65-90	15-80	30-100	35-90
Tensile Strength, PSI	4000+	3000	3000	2500	3000	To 8000	2000+	1400+	2000+	500-3000
Elongation, %	To 700	500	To 800	To 500	To 700	To 650	To 300	To 700	600	To 800
Tear Resistance	Excels	Good	Good	Fair	Good	Excels	Fair	Good	Fair	Good
Weather Resistance	Fair	Fair	Excels	Excels	Fair	Excels	Excels	Excels	Excels	Excels
Ozone Resistance	Poor	Poor	Excels	Excels	Poor	Excels	Excels	Excels	Excels	Excels
Water Resistance	Excels	Excels	Good	Excels	Excels	Fair	Good	Good	Excels	Excels
Oil & Gasoline Resistance	Poor	Poor	Good	Poor	Excels	Excels	Excels	Poor	Poor	Excels
Solvent Resistance: Aliphatic Hydrocarbons	Poor	Poor	Good	Poor	Excels	Excels	Excels	Poor	Poor	Excels
Solvent Resistance: Aromatic Hydrocarbons	Poor	Poor	Poor	Fair	Good	Fair	Excels	Poor	Poor	Good
Brittle Point oF	-80	-80	-50	-80	-65	-60	-60	-180	-80	-62
Stiffening Point oF (avg)	-40	-35	-10	-35	-10	-20	-15	-150	-25	-40
Compression Set	Good	Good	Fair	Fair	Good	Excels	Good	Excels	Fair	Excels
Temperature Resistance To 212 oF To 350 oF To 450oF	Fair Poor Poor	Good Poor Poor	Good Poor Poor	Excels Good Poor	Good Poor Poor	Good Poor Poor	Excels Excels Excels	Excels Excels Excels	Excels Good Poor	Excels Fair Poor
Gas Impermeability	Good	Fair	Good	Good	Good	Good	Excels	Fair	Excels	Excels
Abrasion Resistance	Excels	Excels	Good	Good	Good	Excels	Fair	Fair	Excels	Excels
Flex Resistance	Excels	Good	Good	Good	Good	Good	Good	Excels	Good	Excels

 

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