Determination of the enthalpy of solid phase transition for isotactic polypropylene using a modified DSC technique

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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/5269

Title: Determination of the enthalpy of solid phase transition for isotactic polypropylene using a modified DSC technique
Author(s): Cao, Jinan; Sbarski, Igor
Abstract: This paper investigates the enthalpy of solid phase transition of isotactic polypropylene from the mesomorphic phase to the monoclinic crystal form using DSC. iPP fibres with either monoclinic crystal form or mesomorphic phase were obtained by varying the conditions of melt spinning. XRD and mechanical tests were used to confirm the crystal forms. It is found that conventional DSC techniques fail to detect the transition enthalpy; a technique using silicon oil as the thermal medium was then employed to determine the transition enthalpy, which is of 3% the melting enthalpy for crystallites with monoclinic form, or 6.1 J/g on 100% crystallinity basis.
Publication type: Journal article
Research centre: Swinburne University of Technology. Faculty of Engineering and Industrial Sciences. Industrial Research Institute Swinburne
Source: Polymer, Vol. 47, no. 1 (2006), p. 27-31
Publication year: 2006
Keyword(s): Enthalpy; Polypropylene; Solid phase transition
Publisher: Elsevier
Format: 27-31
ISSN: 0032-3861
Publisher URL: http://dx.doi.org/10.1016/j.polymer.2005.10.144
Peer reviewed