Essential work of fracture of poly(?-caprolactone)/boehmite alumina nanocomposites: Effect of surface coating
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Tartalom: http://dx.doi.org/10.1002/app.39004
Archívum: MTA Könyvtár
Gyűjtemény: Status = Submitted

Type = Article
Cím:
Essential work of fracture of poly(?-caprolactone)/boehmite alumina nanocomposites: Effect of surface coating
Létrehozó:
Tuba, Ferenc
Khumalo, Vincent M.
Karger-Kocsis, József
Kiadó:
Wiley-Blackwell
Dátum:
2013-02-13
Téma:
TJ Mechanical engineering and machinery / gépészmérnöki tudományok
Tartalmi leírás:
The essential work of fracture (EWF) approach has been adopted to reveal the effect of nanofillers on the
toughness of poly(?-caprolactone)/boehmite alumina (PCL/BA) nanocomposites. Synthetic BA particles
of different surface treatments were dispersed in the PCL matrix by extrusion melt compounding. The
morphology of composites was studied by scanning electron microscopy. Differential scanning
calorimetry and wide angle X-ray scattering were used to detect changes in the crystalline structure of
PCL. Besides the mode I type EWF tests, dynamic mechanical analysis (DMA) and quasi-static tensile
tests were applied to study the effect of BA nanofillers on the mechanical properties. BA was
homogenously dispersed and acted as heterogeneous crystallization nucleant and non-reinforcing filler in
PCL. The tensile modulus and yield strength slightly increased, whereas the yield strain decreased with
increasing BA content (up to 10 wt%). Effect of the BA surface treatment with octylsilane (OS) was
negligible by contrast to alkylbenzene sulphonic acid (OS2). Like the tensile mechanical data, the
essential and non-essential work of fracture parameters did not change significantly, either. Improved
PCL/BA adhesion in case of OS2 treatment excluded the usual EWF treatise. This was circumvented by
making use of energy partitioning between yielding and necking. The yielding related essential work of
fracture decreased while the non-essential one increased with BA content and with better interfacial
adhesion. This was attributed to the effect of matrix/filler debonding.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Tuba, Ferenc and Khumalo, Vincent M. and Karger-Kocsis, József (2013) Essential work of fracture of poly(?-caprolactone)/boehmite alumina nanocomposites: Effect of surface coating. Journal of Applied Polymer Science, 129 (5). pp. 2950-2958. ISSN 00218995 (Submitted)
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