Abstract
Two different types of inorganic silica fillers, nano-silica powder (NSP) and colloidal silica sol (CSS) were added into isotactic polypropylene (iPP) with low silica content (0.2 wt%) and the influence of the two silica fillers on the crystallization behavior and mechanical properties of iPP were investigated. Differential scanning calorimeter (DSC) results showed that the crystallization temperature of iPP with CSS and NSP were increased by 4.1 °C, and 2.4 °C, respectively. The tensile strength, flexural strength, and izod impact strength of iPP/CSS (33.75 MPa, 33.04 MPa, and 4.80 kJ/m2) were higher than that of iPP/NSP (32.09 MPa, 32.27 MPa, and 4.25 kJ/m2). In addition, the haze value of iPP/CSS was decreased from 37.6 % to 27.6 %, which was 4.7 % lower than that of iPP/NSP (32.3 %). The better performance of CSS as ascribed to its better dispersion ability in iPP matrix than NSP, and it was verified by scanning electron micrograph (SEM) and transmission electron microscope (TEM). Overall, these results indicated that inorganic silica sols had a potential application in the nanoparticle-reinforced composites field.
References
Alfréd, M., Markus, G., József, V., Klaus, B., Pirjo, J. and Béla, P., “The Influence of Nucleus Density on Optical Properties in Nucleated Isotactic Polypropylene”, Eur. Polym. J., 45, 3138–3148 (2009) 10.1016/j.eurpolymj.2009.08.006Search in Google Scholar
Cai, D., Zhang, Y. and Chen, Y. M., “Effect of Organic Modification of SiO2 on Non-Isothermal Crystallization of PET in PET/SiO2 Nanocomposites”, Iran. Polym. J., 16, 851–859 (2007)Search in Google Scholar
Chen, X. Y., Steven, P. A., “Surface Polymerization of Hydrophilic Methacrylates from Ultrafine Silica Sols in Protic Media at Ambient Temperature: A Novel Approach to Surface Functionalization Using a Polyelecrolytic Macroinitiator”, Adv. Mater., 18, 1558–1562 (2003) 10.1002/adma.200305067Search in Google Scholar
Dougnac, V. N., Alamillo, R., Peoples, B. C. and Quijada, R., “Effect of Particle Diameter on the Permeability of Polypropylene/SiO2Nanocomposites”, Polymer, 51, 2918–2926 (2010) 10.1016/j.polymer.2010.02.014Search in Google Scholar
Gong, W., Liu, K.J., Zhang, C., Zhu, J. H. and He, L., “Foaming Behavior and Mechanical Properties of Microcellular PP/SiO2 Composites”, Int. Polym. Proc., 27,181–186 (2012) 10.3139/217.2458Search in Google Scholar
He, W. T., Wu, D. H., Li, J., Xiang, Y. S., Long, L. J., Qin, S. H., Yu, J. and Zhang, Q., “Surface Modification of Colloidal Silica Nanoparticles: Controlling the Size and Grafting Process”, Bull. Korean Chem. Soc., 34, 2747–2752 (2013) 10.5012/bkcs.2013.34.9.2747Search in Google Scholar
Jain, S., Goossens, H., Duin, M. V. and Lemstra, P., “Effect of in situ Prepared Silica Nano-Particles on Non-Isothermal Crystallization of Polypropylene”, Polymer, 46, 8805–8818 (2005) 10.1016/j.polymer.2004.12.062Search in Google Scholar
Kim, K. J., White, J. L., “Silica Surface Modification Using Different Aliphatic Chain Length Silane Coupling Agents and their Effects on Silica Agglomerate Size and Processability”, Compos. Interfaces, 9, 541–556 (2002) 10.1163/15685540260494119Search in Google Scholar
Kinnt, A., “Amphiphilic Surface Modification of Colloidal Silica Sols”, Master Thesis, Chalmers University of Technology, Gîteborg, Sweden (2011)Search in Google Scholar
Li, H., Zhan, R. B. and Lu, Y. F., “Mechanical Properties and Crystallization Behavior of Polypropylene/Nano-SiO2”, J. Reinf. Plast. Compos., 25, 1001–1012 (2006) 10.1177/0731684406065131Search in Google Scholar
Lin, O. H., Hazizan, M. A. and Mohd Ishak, Z. A., “Surface-Activated Nanosilica Treated with Silane Coupling Agents/Polypropylene Composites: Mechanical, Morphological, and Thermal Studies”, Polym. Compos., 32, 1568–1583 (2011) 10.1002/pc.21190Search in Google Scholar
Lu, S. J., He, M., Zhang, M. M., Zhang, T. S. and Yu, J., “Effects of Nano-Silicon and Silicon Sols Nucleating Agent on Properties of Polypropylene”, Polym. Mater. Sci. Eng., 25, 61–64 (2009)Search in Google Scholar
Meth, S. J., Zane, S. G., Chi, C. Z., Londono, D., Wood, B. A., Cotts, P., Keating, M., Guise, W. and Weigand, S., “Development of Filler Structure in Colloidal Silica Polymer”, Macromolecules, 44, 8301–8313 (2011) 10.1021/ma201714uSearch in Google Scholar
MoonGyu, H., Armes, S. P., “Preparation Characterization of Polypyrrole–Silica Colloidal Nanocomposites in Water–Methanol Mixtures”, J. Coll. Interf. Sci., 2, 418–427 (2003)Search in Google Scholar
Moore, E. P.: Polypropylene Handbook: Polymerization, Characterization, Properties, Processing, Applications, Hanser-Gardner, Cincinnati (1996)Search in Google Scholar
Percy, M. J., Armes, S. P., “Surfactant-Free Synthesis of Colloidal Poly(methyl methacrylate)/Silica Nanocomposites in the Absence of Auxiliary Comonomers”, Langmuir, 18, 4562–4565 (2002) 10.1021/la020158sSearch in Google Scholar
Reyes-De, V.S., Aguilar, A., Avalos, F. and Ramos-De, V.' L. F., “Carbon Nanoparticles as Effective Nucleating Agents for Polypropylene”, J. Therm. Anal. Calorim., 93, 947–952 (2008) 10.1007/s10973-007-8591-9Search in Google Scholar
Rong, M. Z., Zhang, M. Q., Pan, S. L., Lehmann, B. and Friedrich, K., “Analysis of the Interfacial Interactions in Polypropylene/Silica Nanocomposites”, Polym. Int., 53, 176–183 (2004) 10.1002/pi.1307Search in Google Scholar
Schmid, A., Tonnar, J. and Armes, S. P., “A New Highly Efficient Route to Polymer-Silica Colloidal Nanocomposite Particles”, Adv. Mater., 20, 3331–3336 (2008) 10.1002/adma.200800506Search in Google Scholar
Shuichi, T., Leszek, A. U., Andrés, G. R., Jacques, T., Kenneth, C. C. and Musa, R. K., “Melt Compounding of Different Grades of Polystyrene with Organoclay, Part 1: Compounding and Characterization”, Polym. Eng. Sci., 44, 1046–1060 (2004) 10.1002/pen.20098Search in Google Scholar
Tan, X. M., Xu, Y. S., Cai, N. and Jia, G. W., “Polypropylene/Silica Nanocomposites Prepared By in-situ Melt Ultrasonication”, Polym. Compos., 30, 835–840 (2009) 10.1002/pc.20598Search in Google Scholar
Wu, C. L., Zhang, M. Q., Rong, M. Z. and Friedrich, K., “Silica Nanoparticles Filled Polypropylene: Effects of Particle Surface Treatment, Matrix Ductility and Particle Species on Mechanical Performance of the Composites”, Compos. Sci. Technol., 65, 635–645 (2005) 10.1016/j.compscitech.2004.09.004Search in Google Scholar
Wu, L. B., Cao, D., Huang, Y. and Li, B. G., “Poly(L-lactic Aaid)/SiO2 Nanocomposites via in situ Melt Polycondensation of L-lactic Acid in the Presence of Acidic Silica Sol: Preparation and Characterization”, Polymer, 49, 742–748 (2008) 10.1016/j.polymer.2007.12.019Search in Google Scholar
Xu, N., Zhou, W. and Shi, W. F., “Preparation and Enhanced Properties of Poly(propylene)/Silica-Grafted- Hyperbranched Polyester Nanocomposites ”, Polym. Adv. Technol., 15, 654–661 (2004) 10.1002/pat.522Search in Google Scholar
Yu, Y. Y., Chen, C. Y. and Chen, W. C., “Synthesis and Characterization of Organic–Inorganic Hybrid Thin Films from Poly(acrylic) and Monodispersed Colloidal Silica”, Polymer, 44, 593–601 (2003) 10.1016/S0032-3861(02)00824-8Search in Google Scholar
Zuiderduin, W. C. J., Westzaan, J. H. and Gaymans, R. J., “Toughening of Polypropylene with Calcium Carbonate Particles”, Polymer, 44, 261–275 (2003) 10.1016/S0032-3861(02)00769-3Search in Google Scholar
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