The vacuum-tight thermo-microbalance for highest demands

TG 209 F1 Iris® - Thermo-Microbalance

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Components of a rubber compound for tires

Besides the plasticizer portion (ca. 7%), the first elastomer components during the decomposition of a rubber compound are derived at 383°C (38%) and the second at 448°C (31%). The carbon black portion is calculated at 20% and the ash content at 4%. The position of the peak temperatures of the derivated TGA curves (DTG) show that the compound is a carbon black-filled NR/SBR rubber blend.

Thermal decomposition of dolomite in a CO₂-atmosphere

The mass loss steps during the thermal decomposition of dolomite [CaMg(CO₃)₂] overlap when the measurement is performed in a nitrogen atmosphere. By using CO₂ as a purge gas, they can be clearly separated. The calculated DTA signal (c-DTA®) additionally yields the information that both effects are endothermal.

Plasticizer content in a rubber compound

In a standard measurement, the evaporation of a low-molecular plasticizer is overlapped by the decomposition of the elastomer components. The plasticizer begins separating earlier due to the lower boiling point resulting from the vacuum. The plasticizer content can hereby be determined much more precisely.

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FTIR Coupling