Basalt Fiber Reinforced Hybrid Polymer Composites
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Short fiber (basalt, carbon, ceramic, and glass) reinforced polypropylene hybrid composites were investigated to determine their mechanical properties in case of different reinforcing fiber types. The composites were reinforced with fibers and were produced by hot pressing after hot mixing techniques. Composite properties such as flexural strength, stiffness, static and dynamic fracture toughness were measured. It was realized that the main damage modes of the composites are fiber pullout and debonding. It was also found that basalt fibers are the most sensitive to the lack of the treatment with additives. These results were supported by scanning electron micrographs taken of the fracture surfaces.Keywords:
Basalt fiber
Polypropylene
Hot pressing
This specification establishes requirements and test methods for materials, impact strength, appearance, surface flame spread, and windload resistance of siding products manufactured from polypropylene material. The use of polypropylene recycled plastic in this product shall conform to the specified requirements. The siding shall be made principally of polypropylene compound, prepared from polypropylene homopolymer or copolymer. The polypropylene compound shall be compounded so as to provide the heat stability and weather exposure stability required for the siding market application.
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In order to enhance the fracture toughness of alumina ceramics,the ultra-fine, homogeneous and high-dense alumina-based Ni-Fe/Al_2O_3 nanocomposite was fabricated using mechno-chemical method and hot-pressing process. Its maximum relative density after hot-pressing reaches 99%. The size of Ni-Fe particles is about 100 ~ 500 nm. The fracture toughness of alumina increased from 4.75 MPa·m~1/2 to 6.24MPa·m~~1/2when 19 % Ni-Fe is added into Al_2O_3matrix.The effects of the alloy components on the composite are also studied by changing its components. The toughing mechanism of the alumina-based nanocomposite is discussed based on its microstructure analysis.
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Abstract An investigation of the effect of sample dimensions on the oxidation of polypropylene is described. The results are used to select testing conditions. Two examples of the utility of the method are presented. First, a control method for uninhibited polypropylene and, secondly, an investigation of the synergistic effect between 2,6‐di‐t‐butyl‐p‐cresol and dilaurylthiodipropionate.
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This Innovations Deserving Exploratory Analysis (IDEA) project focused on an evaluation of the feasibility of using composite rebar in concrete reinforcement based on studies of the properties of basalt fiber and reinforced composite. The progress report focuses on the technical characteristics of basalt-fiber composite/concrete. Basalt fibers exhibit a high level of mechanical characteristics (tensile strength, modulus) and chemical stability in cement media. An evaluation of the mechanical characteristics of basalt-fiber composites is provided. The technical characteristics of basalt fiber reinforced concrete are considered and suitable basalt fibers for fiber-reinforced concrete applications are defined.
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In this book the reader can explore how additives and fillers have been employed as a mean to improve polypropylene properties: mechanical,fluid and resistance to photodegradation. This book explores common properties, advantages and drawbacks of polypropylene, and the means that researchers have been studying as a manner of solve the main disadvantages of polypropylene by the use of additives such as nanoparticles, blend compatibilizers, hindered amine light stabilizers (HALS). These materials have been proved succesful to mantain polypropylene as a top choice in the field of thermoplastics.
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For increasing the toughness of polypropylene and expanding its applications,the modification mechanism polypropylene is discussed in this paper, and the inorganic particles (calcium carbonate)and organic plastic materials (polyethylene St) are used to modify the polypropylene in this article.The characterization of the polypropylene modified by calcium carbonate and St-modified shows much better toughness and mechanical strength than the pure polypropylene.
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Characterization
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In this paper,various behavior of homo-polypropylene and co-polypropylene were studied,including thermo-oxidant aging,stress white,post shrinkage after different treatment conditions,and dyeing.After thermo-oxidant aging,the impact strength of homo-polypropylene decreased remarkably,however,that of co-polypropylene increased up to 200 % at first,and then decreased slowly.The resistance to stress whitening of homo-polypropylene was better than that of co-polypropylene.After heat treatment and boiled in water,the post shrinkage of polypropylene with high crystallinity was lower than that of polypropylene with low crystallinity.When the blackness of polypropylene was larger,the hue was more bluish.
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Basalt fiber is a novel high-performance inorganic material, recently has been well received as a reinforcement in China. However, the applications in civil engineering have been rather limited. The chemical compositions, the characteristics of basalt fibers, and the typical products of basalt, including chopped yarn of basalt fiber, basalt fiber geo-textiles and basalt fiber reinforced polymer, were introduced．The advantages of basalt fibers as a reinforcement of concrete were explored in comparison with the commonly used reinforcing fibers, which indicates that basalt fiber is the most promising reinforcement material for concrete and will significantly benefit civil construction industries in the future.
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