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Natural Ribber/
Povisodrene
Polybutadine
SER
Polynobonene
Ethylene
propylene
polymers
Butyl Rubber
Polychloroprene
ISO Designation
NR/IR
BR
SBR
PNR
GEMP/ EPDM
IIR/CIIR/BIIR
CR
Maximum Temperature, C
80
80
80
80
120+
120
100
Macimum Temperature, C
-50
-70
-40
-20
-40
-25
-30
Physical Properties
Density Range (Mg/m3)
0.9-0.94
0.090-0.091
0.93-0.94
-
0.85-0.87
1.10-1.013
1.23-1.25
Hardeness range shore A
30 - 100
15 - 80
35 - 95
15 - 95
30 - 95
35 - 95
35 -95
Tensile Strength(approx max),psi
4000
25000
3000
3500
3000
2500
4000
Elongation
(approx max), %
Tear Strength
E
G
F
G
F-G
G
E
REsilience
E
E
G
P-F
G
P-F
G-E
Abrasion Ressistance
E
E
G-E
G
G
F
G-E
Compreeion Set Resistance
G
F
G
G
G
F
F-G
Impemeability
F
F
F
G-E
F
E
F-G
Electrical Resistivity
E
E
E
G
E
E
F
Low Temperature Flexibility
G-E
E
G
F-G
G
F
F
Environmental Resistance
Ozone Resistance
P
P
P
P
E
E
G
UV Resistance
P-F
P-F
F
F
E
E
G
Flame Resistance
P
P
P
P
P
P
P
 
Water
E
E
G-E
E
E
E
P-G
Steam (>120 c)
P
P
P
P
G
G
F
Acid
F
G
F-G
G
G
G
G
Basses
G
G
F-G
G
G
G
G


P=Poor, F=Fair, G=Good, VG=Very good, E=Excellent