Research Article
The Physical Modification of a Natural Rubber-Polypropylene Thermoplastic Elastomer Blend by Azobisformamide Blowing Agent
Table 1
Composition of the blends.
| | Ingredient |
Designation (quantities in parts per hundred parts by weight of rubber) | | M1 | M2 | M3 | M4 |
| | NR | 70 | 70 | 70 | 70 | | PP | 30 | 30 | 30 | 30 | | ABFA | — | 0.4–1 | 0.4–1 | 0.4–1 | | Sulfur | — | — | 1 | — | | TMTD | — | — | 1 | 1 | | ZnO | — | — | 5 | — | | Stearic acid | — | — | 1 | — |
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