POLYMERS AND POLYMER MATRIX COMPOSITES |
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Studies on Foaming Properties and Mechanical Properties of Polypropylene/β-Cyclodextrin Foamed Composite |
ZHANG Heng1, ZHOU Yuhui1, ZHANG Fei1, GONG Wei2,3, HE Li1,3
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1 The Institute of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; 2 The Institute of Materials and Construction, Guizhou Normal University, Guiyang 550025, China; 3 National Engineering Research Center for Compounding and Modification of Polymer Materials, Guiyang 550014, China |
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Abstract In this study, polypropylene(PP) foamed composite was prepared using β-cyclodextrin (BC) as nucleating agent through a microcellular injection molding foaming process. The paper studied the effect of different contents of BC (0.25%—7%) on foamed PP composite’s foaming properties and mechanical properties by electron microscopy and differential scanning calorimeter. The results showed that the foaming behavior of PP was significantly improved with the BC content increasing. When BC content was 7%, the ideal cell morphology was obtained, the average diameter was 27.17 μm and the density was 1.01×107 cell/cm3. It was found that the crystallization temperature, crystallization rate of PP could be obviously improved by adding BC, which was advantageous to the crystallization of PP at higher temperature, and prevented the cell collapsing and dipping. Compared with polypropylene foaming materials, the tensile, bending and impact strength of foamed PP/BC composites increased by 21.2%, 7% and 12% respectively.
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Published: 15 January 2020
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About author:: Heng Zhang, graduated from Chongqing Jiaotong University, is now a graduate student in the school of materials and metallurgy, Guizhou University, engaged in polymer structure and performance research;Li He, received his Ph.D. degree in materials science and engineering, Xi'an Jiaotong University, currently engaged in polymer foaming and industrial applications. He has published more than 50 academic papers in academic journals at home and abroad. |
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