Abstract
Intraply hybrid green composites were prepared by film stacking and hot-pressing of bio-based polyamide 11 (PA11) sheets and commercial hybrid fabrics made by interweaving flax and basalt fibers (2/2 twill structure). Two matrices were considered, one of them containing a plasticizing agent. After preliminary thermal and rheological characterizations of the neat matrices, the laminates were studied in terms of flexural properties at low and high deformation rates, and the results were interpreted in the light of morphological analyses (scanning electron and optical microscopy). Despite the poor interfacial adhesion detected for all investigated composite samples, the latter exhibited a good combination of flexural strength, modulus, and impact resistance. Such well-balanced mechanical properties make the studied samples potential candidates for semi-structural applications, e.g., in the transportation sector.
Highlights
IntroductionIn line with the general trend to use reinforced plastics for both functional and structural applications, the hybridization approach, mainly obtained by embedding two or more different fibers within a polymer matrix, allows to tailor the properties of products to suit ever more specific requirements
In the last decades, a steady increase of interest has been devoted toward the design and development of hybrid composite systems given their outstanding perspectives of applications, even for advanced uses, deriving from the ability to combine advantages of the individual constituents, for example, stiffness and toughness, and the occurrence of synergisms, not yet well understood [1,2,3,4].In line with the general trend to use reinforced plastics for both functional and structural applications, the hybridization approach, mainly obtained by embedding two or more different fibers within a polymer matrix, allows to tailor the properties of products to suit ever more specific requirements
Among the various bio-based thermoplastic resins here we focus our attention on polyamide 11 (PA11), which is a semi-crystalline bio-polyamide produced using 11-aminoundecanoic acid derived from castor oil
Summary
In line with the general trend to use reinforced plastics for both functional and structural applications, the hybridization approach, mainly obtained by embedding two or more different fibers within a polymer matrix, allows to tailor the properties of products to suit ever more specific requirements. In this regard, common configurations consist of different kinds of fibers distributed in different laminas or in the same one to form interply or intraply hybrids, respectively [5,6]. Ferrante et al [9] considered the effect of basalt fibers hybridization on the damage
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