02190nam a2200229Ia 4500003001000000005001700010040000900027245018600036490005700222520130900279650003701588650002601625650002601651650002301677700001501700700001401715700001401729700001201743700001001755856015401765008004101919MX-MdCICY20260521091752.0  cCICY10aUltra-large sized graphene nano-platelets (GnPs)incorporated polypropylene (PP)/GnPs composites engineered by melt compounding and its thermal, mechanical, and electrical properties0 vComposites Part B: Engineering, 133, p.218-225, 20183 aIn this study, polypropylene (PP)/graphene nanoplatelet (GnPs)nanocomposites with very large sized GnPs (?150 ?m)are prepared by melt extrusion followed by injection molding. A number of characteristics including thermal, mechanical, and electrical properties are analyzed. DSC shows that the introduction of GnPs facilitates the crystallization of polymer matrix due to a role of GnPs that serves as seeds for heterogeneous nucleation, and XRD reveals that GnPs have a minor induction effect of ? crystals. Taking advantage of the large size and high aspect ratio of GnPs, a relatively low percolation threshold of ?2.99 vol percent is obtained with highly increased in-plane and through-plane electrical conductivity. The fitting of experimental data to the percolation theory indicates that GnPs are three dimensionally dispersed within the polymer matrix. The composites exhibit relatively limited mechanical enhancement due to compromising of GnPs by the shear force introduced during the compounding process. Overall, the usage of large sized GnPs is clearly beneficial for obtaining high electrical conductivity with a less amount of filler, but an enhanced dispersion of fillers with controlled morphology is required to achieve great physical and mechanical properties of the PP/GnPs composites.14aPOLYMER-MATRIX COMPOSITES (PMCS)14aELECTRICAL PROPERTIES14aMECHANICAL PROPERTIES14aTHERMAL PROPERTIES12aJun, Y. S.12aUm, J. G.12aJiang, G.12aLui, G.12aYu, A40uhttps://drive.google.com/open?id=16D5V64Htfjfy28ekpB7juxFKn4E8SXQi&usp=drive_copyzPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx250602s9999    xx |||||s2   |||| ||und|d