Study on Relationship Between Impact Strength and Fracture Surface Fractal Dimension of PP/Nano-CaCO3 Composites

PDF(493 KB)

Journal of Materials Engineering ›› 2009, Vol. 0 ›› Issue (10) : 53-56.

Study on Relationship Between Impact Strength and Fracture Surface Fractal Dimension of PP/Nano-CaCO₃ Composites

LIANG Ji-zhao, WU Cheng-bao

Author information +

History +

Abstract

The particle surface of nanometer calcium carbonate(Nano-CaCO₃) was treated respectively by fatty acid and titanate coupling agent,and PP/Nano-CaCO₃ composites were prepared by means of melt blending.The V-notched impact strength of the nano-composite was measured at room temperature.The V-notched impact fracture surface fractal dimensions of PP/Nano-CaCO₃ composite were measured by means of projective-covering meathod,and the relationship between fracture surface fractal dimension and impact strength of the composite was investigated.The results show that the fracture surface fractal dimension ranges from 2.3673 to 2.4120,all of the correlation coefficients is higher than 0.95,the strong correlation indicates that impact fracture surface of PP/Nano-CaCO₃ composites is evidently fractal,and the relationship between impact strength and fracture surface fractal dimension of the composites obeys roughly exponential function.

Key words

polypropylene / calcium carbonate / nano-composite / fracture surface fractal dimension / impact strength

Cite this article

EndNote

Ris (Procite)

Bibtex

Download Citations

LIANG Ji-zhao, WU Cheng-bao. Study on Relationship Between Impact Strength and Fracture Surface Fractal Dimension of PP/Nano-CaCO₃ Composites[J]. Journal of Materials Engineering, 2009, 0(10): 53-56

References

[1] MACHADO F,LIM E L,PINTO J C,et al.In situ preparation of polypropylene/1-butene alloys using a MgC₁₂-supported ziegler-natta catalyst[J].European Polymer Journal,2008,44:1130-1139.
[2] YU F Y,ZHANG H B,ZHENG H,et al.Experimental study of flow-induced crystallization in the blends of isotactic polypropyl-ene and poly(ethylene-co-octene)[J].European Polymer Jour-nal,2008,44:79-86.
[3] GORNA K,VUCAK M,GROHN F,et al.Amorphous calcium carbonate in form of spherical nanosized particles and its applica-tion as fillers for polymers[J].Materials Sciences and Engineer-ing,2008,477:217-225.
[4] HATTOTUWA G,PREMALAL H.Comparison of the mechan-ical properties of rice husk powder filled polypropylene composites with talc filled polypropylene composites[J].Polymer Testing,2002,21(8):833-839.
[5] MAI K C,LI Z J,QIU Y Xt et al.Mechanical properties and fracture morphology of AI(OH)₃/Polypropylene composites mod-ified by PP grafting with acrylic acid[J].Journal of Applied Poly-mer Science,2001,80:2617-2623.
[6] LIANG J Z.Tensile properties of hollow glass bead-filled poly-propylene composites[J].Journal of Applied Polymer Science,2007,104:1697-1701.
[7] LIANG J Z.Toughening and reinforcing in rigid inorganic particle filled polypropylene:A review EJ].Journal of Applied Polymer Science,2002,83:1547-1555.
[8] ZUIDERDUIN W C J,WESTZAAN C,HU[TINK J,et al.Toughening of polypropylene with calcium carbonate particles[J].Polymer,2003,44:261-275.
[9] CHAN C M,WU J S,LI J X,et al.Polypropylene/calcium car-bonate nanocomposites[J].Polymer,2002,43:2981-2992.
[10] YANG K,YANG Q,LI G X,et al.Morphology and mechani-cal properties of polypropylene calcium carbonate nanocompos-ites[J].Materials Letters,2006,60:805-809.
[11] WU C L,ZHANG M Q,RONG M Z,et al.Silica nanoparticles filled polypropylene:effects of particle surface treatment,matrix ductility and particle species on mechanical performance of the composites[J].Composites Science and Technology,2005,65:635-645.
[12] MANDELBROT B B,PASSOJA D E,PAULLA A J.Fractal character of fracture surface of metals[J].Nature,1984,(19):721-722.
[13] 唐玮,朱华,王勇.应力腐蚀断口的分形行为[J].钢铁研究学报,2007,19(8):56-58.
[14] 王金安,谢和平,田晓燕,等.一种新的断裂表面分形测量方法[J].北京科技大学学报,1999,21(1):6-9.