Hardness, Tensile, Tear, Compression Set and Rebound Properties

2 Hardness, Tensile, Tear, Compression Set and Rebound Properties 

Eracture energy (kN/m) (area under stress-strain curve) 105 81 82 73 55 

HER-HP and TG-210 chain extenders produced elastomer hardnesses in excess of 60 Shore D, but the hardness decreased to 48 Shore D for the elastomer extended with TG- 

By correlating the elastomer hardness with that of other physical and mechanical properties, a clear trend can he seen showing that as the hardness is decreased, the 100% tensile modulus, fracture energy and tear strength values are also decreased. 

On the other hand, a gradual increase in tensile strength and compression set values is observed for cast elastomers containing more amorphous hard segment contents. 

---