Neat PP examples of modulus retention versus temperature C

At low temperatures, general-purpose grades are generally usable down to -10°C but special grades perform well down to -40°C (bumper grades, for example) according to the mechanical constraints experienced. 

The glass transition temperatures of polypropylenes by DSC measurements generally 

The glass transition temperatures by DTMA measurements can be higher, depending on the frequency. 

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

General-purpose polypropylenes are naturally whitish, and translucent to opaque according to the grade. Certain grades are especially designed for clarity. 

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Figure 4.9. Neat PP examples of modulus retention (%) versus temperature (°C)...

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