|
|
Sulfur Modified |
Non - Sulfur Modified |
|
G type |
W type |
T type |
|
|
Raw polymer
Stability |
Worse than W /
T types |
Very Stable |
Very Stable |
 |
Milling
Effect |
Effective (
special peptizer can be used ) |
Small |
Small |
|
Tackiness |
Tacky |
Less tacky |
Less tacky |
|
Mill
Shrinkage |
Very small
when milling |
Larger than G
type |
Less shrinkage |
|
Extrudability |
Very smooth
surface |
Good collapse
resistance |
Very smooth
surface with better collapse resistance |
|
Cure Rate |
Curable
without accelerator |
Variable
depending on accelerators |
Variable
depending on accelerators |
 |
Tensile
Strength |
Better than W
/ T types at higher rubber content |
Better than G
type when highly loaded |
Better than G
type when highly loaded |
|
Tear
Strength |
Better than W
/ T types |
- |
- |
|
Resilience |
Larger than W
/ T types |
- |
- |
|
Elongation |
Better than W
/ T types |
- |
- |
|
Compression
Set resistance |
- |
Better than G
type at elevated temperature |
Better than G
type at elevated temperature |
|
Heat
Resistance |
- |
Better than G
type |
Better than G
type |
|
Flex
Resistance |
Better than W
/ T types |
- |
- |
|
Texture |
Similar to NR |
- |
- |
|
Adhesion |
Better
adhesion to NR or SBR than W / T types |
Good |
Good |
|
Others |
Little
difference of weather, ozone and flame resistance among G,
W and T |
|
Requirement
/ Application |
Hot tear strength. Complicated-shape molded goods.
Tacky compound. Lower compound viscosity. Belting,
Sponge(foam). |
Heat resistance. Compression set resistance. General
purpose and extrusion. |
Less shrinkage with collapse resistance. Extruded
goods, calendered sheet. |
|
