Abstract
The toughening of polyamide 6 is desirable for many applications and may be obtained by adding a phase to the elastomeric matrix. However, this leads to a loss in its rigidity characteristics. Therefore, this study aimed at developing blends of polyamide 6/compound by recycled rubber (SBR-R), with the addition of compatibilizer graphitized polyethylene and polypropylene with maleic anhydride method by mixing in the molten state in order to obtain a balance between stiffness and toughness. The systems were prepared in several compositions, and their rheological properties and spectroscopy in the Fourier transform infrared were studied by means of rheological curves obtained in an internal mixer of Haake Buchler. The results obtained with the rheological study and Fourier transform infrared showed that mixtures of polyamide 6/graphitized polyethylene with maleic anhydride presented the best results compared to those of polyamide 6/ graphitized polypropylene with maleic anhydride, probably indicating reaction between the components. Thus, it was chosen graphitized polypropylene with maleic anhydride as a compatibilizing agent for carrying out other characterizations. Blends of polyamide 6/compound by recycled rubber/ graphitized polypropylene with maleic anhydride and their properties were analyzed by means of mechanical tests (tensile and impact), dynamic mechanical thermal analysis, differential scanning calorimetry, and scanning electron microscopy. The impact strength and elastic modulus of the blends compatibilized reduced somewhat when compared to polyamide 6. Therefore, these results indicate a good prospect of application of industrial waste, minimizing the negative effect on the environment and adding value to a disposable material.
Highlights
Blending polymers with different molecular structures or mechanical properties have recently become a useful route in developing new, high-performance polymeric materials
For binary polymer blends, when the content of one component is much lower than the other one, the minor usually forms droplet in the matrix of the major component, which is usually known as the sea island morphology (Yu et al, 2010)
The results show that incorporation of the methyl methacrylate maleic anhydride (MMA-MA) copolymer significantly improves the impact strength of nylon-6/acrylonitrile/ EPDM/styrene (AES) blends
Summary
Blending polymers with different molecular structures or mechanical properties have recently become a useful route in developing new, high-performance polymeric materials. Among the advantages of the blends, we can mention the ease of adjusting the properties of plastics usage needs They are primarily important for generating mechanical, chemical, or unwanted barriers and improving the processibility of high-performance polymers (Vossen, 2009). The polymer blends do not permanently harden and can be repeatedly reheated and shaped, have high fatigue strength, ease in carrying out repairs, and especially greater possibility of recycling waste contributing to eliminate or minimize the environmental impact. This shows mechanical properties equal or superior to those shown by the conventionally used thermosetting composites in aerospace (Oliveira and Botelho, 2007). This study aimed at developing blends of polyamide 6/compound by recycled rubber (SBR-R), with the addition of a compatibilizer
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