Annealing experiments with i-PP

A series of annealing experiments was performed using an experimental, PP powder sample. This high isotactic content (96 1 %wt. isotactic triads) i-PP had a molecular weight (Mw-value) of about 300.000 and a Mw/Mn value of 5.0, it was coded HH-SB-35. 

The DSC samples (4 mg.) were heated up to the annealing temperature T(a) and stored there during a certain time t(a). Subsequently, the samples were cooled down to 20°C and 

Fillon et al. [14] showed already that the upper side of the 

The fusion curve becomes asymmetrical on the low temperature side slightly higher Tm- and Hf-values. 

Annealing region II, 150°C s T(a) 163°C The fusion curve is more or less symmetrical, the Tm-values increase with T(a) and the Hf-values are going through a maximum. 

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