Patricia Krawczak

Prof. Dr. Patricia Krawczak

Centre for Materials and Processes, IMT Nord Europe, Douai, Hauts-de-France, France
+1
orcid
Institut Mines-Télécom, IMT Nord Europe (France)

Research Focus & Metrics

Academic Career Length

35Years (1992-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 April 2010 in Progress in Polymer Science
Verified
Journal Article
Closed access
JRJ.-M. Raquez
J.-M. Raquez
MLMylène Deléglise Lagardère
Mylène Deléglise Lagardère
MLM.-F. Lacrampe
M.-F. Lacrampe
Patricia KrawczakPatricia Krawczak
Patricia Krawczak

1 September 2009 in Composites Science and Technology
Verified
Journal Article
Closed access
KPKalappa Prashantha
Kalappa Prashantha
JSJ. Soulestin
J. Soulestin
MLM.F. Lacrampe
M.F. Lacrampe
Patricia KrawczakPatricia Krawczak
Patricia Krawczak
GDG. Dupin
G. Dupin
MCM. Claes
M. Claes

24 January 2018 in Journal of Materials Science
Verified
Journal Article
Closed access
PDF file
PDPierre Duchene
Pierre Duchene
SCSalim Chaki
Salim Chaki
Abderrahmane AyadiAbderrahmane Ayadi
Abderrahmane Ayadi
Patricia KrawczakPatricia Krawczak
Patricia Krawczak

1 January 2011 in Express Polymer Letters
Verified
Journal Article
Closed access
KPKalappa Prashantha
Kalappa Prashantha
MLM. F. Lacrampe
M. F. Lacrampe
Patricia KrawczakPatricia Krawczak
Patricia Krawczak
Halloysites/polypropylene nanocomposites with different nanotubes contents were prepared by diluting a masterbatch containing 30 wt.% halloysites with polypropylene (PP). Unmodified (HNTs) and quaternary ammonium salt treated (QM-HNTs) halloysite nanotubes were used. Both degree of crystallinity and crystallization temperature increase upon addition of halloysites into PP, thus indicating a potential nucleation effect induced by the nanotubes. An homogeneous distribution and dispersion of nanotubes was observed throughout the PP matrix, with a slightly better dispersion in the case of modified QM-HNTs compared to unmodified HNTs. Mechanical tests in tension, bending and notched impact demonstrated that strength and modulus of the nanocomposites significantly increase with addition of halloysites without significant loss of ductility. An halloysite content of 6 wt.% appears as an optimum. Modified halloysites (QM-HNTs) lead to globally better performances due to strong interfacial interaction between the polymer matrix and the nanotubes

1 January 2008 in Express Polymer Letters
Verified
Journal Article
Closed access
KPKalappa Prashantha
Kalappa Prashantha
JSJ. Soulestin
J. Soulestin
MLM. F. Lacrampe
M. F. Lacrampe
MCM. Claes
M. Claes
GDG. Dupin
G. Dupin
Patricia KrawczakPatricia Krawczak
Patricia Krawczak
Multi-wall carbon nanotubes (MWNTs) filled polypropylene (PP) nanocomposites were prepared through diluting a PP/MWNT masterbatch in a PP matrix by melt compounding with a twin screw extruder. Polypropylene grafted maleic anhydride (PP-g-MA) was used to promote the carbon nanotubes dispersion. The effect of PP-g-MA addition on the rheological, mechanical and morphological properties of the nanocomposites was assessed for different MWNTs loadings. Scanning electron microscopy (SEM) has shown that nanotubes are distributed reasonably uniformly. A better dispersion and good adhesion between the nanotubes and the PP matrix is caused by wrapping of PP-g-MA on MWNTs. When PP-g-MA is added, dynamic moduli and viscosity further increases compared to PP/MWNT nanocomposites. The rheological percolation threshold drops significantly. Tensile and flexural moduli and Charpy impact resistance of the nanocomposites also increases by the addition of PP-g-MA. The present study confirms that PP-g-MA is efficient to promote the dispersion of MWNTs in PP matrix and serves as an adhesive to increase their interfacial strength, hence greatly improving the rheological percolation threshold and mechanical properties of PP/MWNT nanocomposites

1 November 2011 in Composites Science and Technology
Verified
Journal Article
Closed access
KPKalappa Prashantha
Kalappa Prashantha
HSH. Schmitt
H. Schmitt
MLM.F. Lacrampe
M.F. Lacrampe
Patricia KrawczakPatricia Krawczak
Patricia Krawczak