Thermal Conductivity Parameters for Semi-crystalline Polymers

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dc.contributor.authorOchoo, L.
dc.date.accessioned2015-06-11T14:01:48Z
dc.date.available2015-06-11T14:01:48Z
dc.date.issued2005
dc.descriptionResearch Articleen_US
dc.description.abstractThe nature and the form that the high temperature thermal conductivity model for semicrystalline polymers should take have been modeled from a thermal conductivity response curve for isotropic polypropylene at 298 K and tested on the results of other polymers reported for other temperatures, The modeling of tile experimental results of this study has led to a suggestion of a modified form of an existing composite model to make it relevant for the interpretation of the thermal conductivity behaviour of semi-crystalline polymers at high temperatures. Features of a mathematical model obtained confirm that although many models treat semi-crystalline polymers as composite materials, at high temperatures they behaves as if there are no distinct sharp boundaries between the crystallites and the amorphous matrix, suggesting that boundary effect terms which are relevant for other classes of composite materials is irrelevant in the case of semi-crystalline polymers at temperatures much greater than 100 K. It further confirms that, at high temperatures, thermal conductivity of a semicrystalline polymer is independent of the thermal conductivity parameter for the crystalline phase but depends mainly on the thermal conductivity of the amorphous matrix, degree of crystallinity, size and distribution of the crystallites.en_US
dc.description.sponsorshipKenyatta Universityen_US
dc.identifier.citationEast African Journal of Physical Sciences 6(2): 79-88 (2005)en_US
dc.identifier.issn1729-5106
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/12897
dc.language.isoenen_US
dc.publisherFaculty of Science Kenyatta Universityen_US
dc.subjectThermal conductivityen_US
dc.subjectSemi-crystalline polymersen_US
dc.subjectComposite modelen_US
dc.subjectBoundary effecten_US
dc.titleThermal Conductivity Parameters for Semi-crystalline Polymersen_US
dc.typeArticleen_US
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