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AuthorMochane, M.J.
AuthorLuyt, A.S.
Available date2017-02-28T06:55:24Z
Publication Date2015-09
Publication NamePolymer Bulletinen_US
Identifierhttp://dx.doi.org/10.1007/s00289-015-1401-9
CitationMochane, M.J. & Luyt, A.S. "The effect of expanded graphite on the flammability and thermal conductivity properties of phase change material based on PP/wax blendsv" Polymer Bulletin (2015) volume 72, issue 9, pp. 2263–2283
ISSN0170-0839
URIhttp://hdl.handle.net/10576/5315
AbstractThe study reports on the flammability, thermal stability, impact properties and thermal conductivity of shape-stabilized phase change materials based on a soft Fischer–Tropsch paraffin wax blended with polypropylene (PP). The blends were melt-mixed with expanded graphite (EG) up to 9 wt% to improve the thermal conductivity and flammability resistance of the material. The thermal stability and flammability results show an increase in thermal stability and flame resistance of PP in the presence of EG, with the flammability further increasing in the presence of wax, probably because of the smaller and better dispersed EG particles in the PP/wax/EG composite that gave rise to a more compact char layer. Although the thermal degradation mechanism did not change in the presence of EG, the EG particles retarded the evolution of the volatile degradation products. The storage modulus of the PP/wax/EG composite was lower than those of PP and PP/EG, and decreased with increasing in wax content because of the softening effect of the wax. The impact strength of the PP/wax/EG composites increased with increasing EG content in all the samples, but decreased with increasing wax content.
SponsorThe National Research Foundation of South Africa
Languageen
PublisherSpringer
Subjectmechanical properties
SubjectThermal stability
SubjectFlammability
SubjectExpanded graphite
SubjectWax
SubjectPolypropylene
TitleThe effect of expanded graphite on the flammability and thermal conductivity properties of phase change material based on PP/wax blends
TypeArticle
Pagination2263-2283
Issue Number9
Volume Number72
ESSN1436-2449


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