Title of article :
The occurrence of hexagonal phases in three monodisperse long n-alkanes at high pressures
Author/Authors :
Hosier، نويسنده , , I.L and Bassett، نويسنده , , D.C، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2002
Pages :
6
From page :
5979
To page :
5984
Abstract :
Stable hexagonal phases have been identified in the three monodisperse long n-alkanes C390H782, C294H590 and C246H494 at pressures ∼0.5 GPa and above. Their isobaric temperature range of stability widens with increasing pressure but decreases for shorter molecular lengths. Crystallization of hexagonal phases from the melt, often under metastable conditions and below the triple point, gives a characteristic morphology distinct from direct crystallization of the orthorhombic phase, as found for polyethylene. The data extend the known stability range of this two-dimensionally ordered phase to shorter molecules and complement previous work on polyethylene and short alkanes.
Keywords :
Monodisperse n-alkanes , Hexagonal phase , high pressure
Journal title :
Polymer
Serial Year :
2002
Journal title :
Polymer
Record number :
1718388
Link To Document :
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