Dynamic mechanical properties and morphology of high‐density polyethylene/CaCO3 blends with and without an impact modifier |
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| Authors: | Yu‐Lin Yang Christian G'Sell Jean‐Marie Hiver Shu‐Lin Bai |
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| Affiliation: | 1. Center for Advanced Composite Materials, Department of Advanced Materials and Nanotechnology, State Key Laboratory of Turbulence and Complex Systems, College of Engineering, Peking University, Beijing 100871, People's Republic of China;2. Laboratoire de Physique des Matériaux, Ecole des Mines de Nancy, Parc de Saurupt, 54042 Nancy Cedex, France |
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| Abstract: | Dynamic mechanical analysis and differential scanning calorimetry were used to investigate the relaxations and crystallization of high‐density polyethylene (HDPE) reinforced with calcium carbonate (CaCO3) particles and an elastomer. Five series of blends were designed and manufactured, including one series of binary blends composed of HDPE and amino acid treated CaCO3 and four series of ternary blends composed of HDPE, treated or untreated CaCO3, and a polyolefin elastomer [poly(ethylene‐co‐octene) (POE)] grafted with maleic anhydride. The analysis of the tan δ diagrams indicated that the ternary blends exhibited phase separation. The modulus increased significantly with the CaCO3 content, and the glass‐transition temperature of POE was the leading parameter that controlled the mechanical properties of the ternary blends. The dynamic mechanical properties and crystallization of the blends were controlled by the synergistic effect of CaCO3 and maleic anhydride grafted POE, which was favored by the core–shell structure of the inclusions. The treatment of the CaCO3 filler had little influence on the mechanical properties and morphology. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 3907–3914, 2007 |
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| Keywords: | blends fillers mechanical properties morphology |
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