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Experimental-numerical studies of the effect of cell structure on the mechanical properties of polypropylene foams. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe effects of the cell size and distribution on the mechanical properties of polypropylene foam were simulated and analyzed by finite element modeling with ANSYS and supporting experiments. The results show that the reduced cell size and narrow size distribution have beneficial influences on both the tensile and impact strengths. Decreasing the cell size or narrowing the cell size distribution was more effective for increasing the impact strength than the tensile strength in the same case. The relationship between the mechanical properties and cell structure parameters has a good correlation with the theoretical model.
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Gong W, Liu KJ, Zhang C, Zhu JH, He L. Foaming Behavior and Mechanical Properties of Microcellular PP/SiO2 Composites. INT POLYM PROC 2013. [DOI: 10.3139/217.2458] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Microcellular foamed polypropylene (PP)/SiO2 composites were prepared by using micro-SiO2 and nano-SiO2 particles. The effects of the particle size of SiO2 on the foaming behavior and mechanical properties of the composites were studied based on heterogeneous nucleation theory. The results showed that the silica facilitated the cell nucleation to some extent. The average cell size of 16.3 μm and the cell density of 4.46 × 107 cells/cm3 were achieved for the composite foam at the silica content of 4 wt.%. The plastic deformation of the PP was strongly constrained due to the presence of the nano-silica. The tensile and impact strength of the nano-SiO2 composite foam are larger than those of the micro-SiO2 composite foam due to the high crack propagation resistance in the microcellular PP/nano-SiO2 composite.
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Affiliation(s)
- W. Gong
- Department of Material and Building Engineering, Guizhou Normal University, Guiyang, PRC
- National Engineering Research Center for Compounding and Modification Polymeric Materials, Guiyang, PRC
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, PRC
| | - K. J. Liu
- School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, PRC
| | - C. Zhang
- National Engineering Research Center for Compounding and Modification Polymeric Materials, Guiyang, PRC
| | - J. H. Zhu
- National Engineering Research Center for Compounding and Modification Polymeric Materials, Guiyang, PRC
| | - L. He
- National Engineering Research Center for Compounding and Modification Polymeric Materials, Guiyang, PRC
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Gong W, Gao J, Jiang M, He L, Yu J, Zhu J. Influence of cell structure parameters on the mechanical properties of microcellular polypropylene materials. J Appl Polym Sci 2011. [DOI: 10.1002/app.33874] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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