Step-scan Alternating Differential Scanning Calorimetry Studies on the Crystallisation Behaviour of Low Molecular Weight Polyethylene
Differential scanning calorimetry (DSC) and step-scan alternating (SSA) DSC were applied to investigate the crystallisation behaviour of polyethylene (PE) with molecular weight of 4000, 15000 and 35000. It has been found that PE 15000 is characterised by the highest degree of crystallinity and by the highest crystallisation temperature, as compared with other PE samples studied in the course of this work. The non-reversing component of the crystallisation process depends strongly on the PE molecular weight; parallelly, the reversing component shows minor fluctuations only, confirming thus the irreversibility of the PE crystallisation process.
KeywordsCrystallisation Behaviour High Crystallisation Temperature Extended Chain Crystal Sine Wave Modulation Isothermal Segment
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