Morphological factor in the melting point depression of polypropylene by alkanes

Morphological factor in the melting point depression of polypropylene by alkanes

Data of the melting point depression of isotactic polypropylene by n-alkanes (nC=5–30) reported by Hamada and Nakajima are analyzed. Anomalous values of the enthalpy of fusion per chain repeat unit and the polymer-diluent interaction parameter that have been obtained by applying the Flory equation f...

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Veröffentlicht in:Polymer (Guilford) 2001-10, Vol.42 (21), p.8897-8900
Hauptverfasser: SIMEK, Lubomir, DOSTAL, Jiri, BOHDANECKY, Miloslav
Format: Artikel
Sprache:eng
Schlagworte:
Applied sciences
Exact sciences and technology
Isotactic polypropylene
Melting point depression
n-Alkanes
Organic polymers
Physicochemistry of polymers
Properties and characterization
Thermal and thermodynamic properties
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Zusammenfassung:Data of the melting point depression of isotactic polypropylene by n-alkanes (nC=5–30) reported by Hamada and Nakajima are analyzed. Anomalous values of the enthalpy of fusion per chain repeat unit and the polymer-diluent interaction parameter that have been obtained by applying the Flory equation for the melting point depression of crystalline polymers are attributed to the effect of diluent on the morphology of polymer crystals. Information on the magnitude of this effect is obtained.
ISSN:0032-3861
1873-2291
DOI:10.1016/S0032-3861(01)00407-4