List of DURACON® POM grades

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6. Molding Characteristics

6.4 Thermal Stability

6.4.1 Changes in Properties by Holding

Fig. 6-16 Relation between retention time in the cylinder of the molding machine and properties

6.4.2 Decomposition Temperature

The decomposition temperatures measured by DSC (Differential Scanning Calorimetry) and TG (Thermogravimetry) are shown in Figs. 6-17 and 6-18. These temperatures are 20-30°C higher than that of acetal homopolymer and the melting point is 10°C lower than that of acetal homopolymer. Therefore, the results show that the moldable temperature range of DURACON® POM is wider than that of acetal homopolymer.

Fig. 6-17 DSC curve	Measurement conditions:  Heating rate: 5°C/min  Sample weight: 14mg Temperature item:  T1: Melting start temperature  T2: Peak point of heat absorption    through melting  t1: Decomposition starting temperature
Fig. 6-18 TG curve	Measurement conditions:  Heating rate: 5°C/min  Sample weight: 14mg Temperature item:  T1: Decomposition start temperature  T2: 50% decomposition temperature  T3: Decomposition and temperature