HIPS examples of modulus retention versus temperature C

For long-term heat ageing, property retention depends on the property and grades considered, notably the heat stabilizers used. Characteristics such as elongation at break and impact strength are especially heat sensitive. 

SMA are specially designed for a slightly better heat resistance. The UL temperature indices of specific grades can be  

At low temperatures, general-purpose grades are generally brittle at room temperature but special grades perform well down to -20°C or even -40°C according to the mechanical stresses undergone. 

The glass transition temperatures of polystyrene by DSC measurements are generally about 90° C. 

These results relate to some grades only and cannot be generalized. 

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Figure 4.39. HIPS examples of modulus retention (%) versus temperature (°C)...

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