Propriedades mecânicas e morfologia de blendas de polipropileno com Tpes

Abreu, Flávia Oliveira Monteiro da Silva; Forte, Maria Madalena de Camargo; Liberman, Susana Alcira

doi:10.1590/s0104-14282006000100015

Cited by 17 publications

(17 citation statements)

References 26 publications

(29 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…63 PA6/SEBS-MA blend increased the T C to 189.9 C, indicating that 20% of SEBS-MA promoted a slight acceleration in crystallization. Similar behavior was reported in the literature, 64 suggesting that good interaction between thermoplastic elastomers and the polymer matrix can improve the crystallization process. Regarding the nanocomposites (Table 2), in general, ferrite addition had a minimal effect on the T c values compared to PA6.…”

Section: Differential Scanning Calorimetrysupporting

confidence: 88%

Preparation of flexible and magnetic PA6/SEBS‐MA nanocomposites reinforced with Ni‐Zn ferrite

et al. 2021

View full text Add to dashboard Cite

Magnetic and flexible nanocomposites of polyamide 6 (PA6)/styrene-(ethylene-butylene)-styrene grafted with maleic anhydride (SEBS-MA) were prepared using Ni-Zn ferrite synthesized by combustion reaction. Thermal treatment was applied to the Ni-Zn ferrite to form a more crystalline phase.The nanocomposites were processed in an internal mixer and later injection molded. The materials were characterized by torque rheometry, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Izod impact strength, tensile strength, magnetic measurements, differential scanning calorimetry (DSC), thermogravimetry (TG), heat deflection temperature (HDT), and scanning electron microscopy (SEM). Ferrite calcination led to a higher degree of crystallinity and nanocomposites with a higher number of crystalline peaks. This favored a higher saturation magnetization. The magnetic hysteresis curves of the nanocomposites indicated a ferrimagnetic behavior. The impact strength and elongation at break increased significantly compared to neat PA6, suggesting the formation of flexible and magnetic nanocomposites. This behavior was ascribed to a chemical reaction between the terminal amine groups of PA6 and the maleic anhydride of SEBS-MA, confirmed by FTIR and torque rheometry. Neat PA6 and the nanocomposites showed similar thermogravimetric, HDT, melting temperature, and crystallization properties. SEM results showed that the dispersed ferrite tends to form agglomerates, especially if calcined. In general, the addition of the non-calcined Ni-Zn ferrite to the PA6 matrix improved the mechanical properties. Conversely, the calcination of ferrite tended to improve the magnetic behavior of the nanocomposites.

show abstract

Section: Differential Scanning Calorimetrysupporting

confidence: 88%

Preparation of flexible and magnetic PA6/SEBS‐MA nanocomposites reinforced with Ni‐Zn ferrite

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This is due to factors related to the intrinsic characteristics of these organic materials, such as low density, high design flexibility, and low cost compared to metallic materials, as well as due to the possibility of being reinforced with other materials producing composites. These composites provide a series of exceptional properties, including high mechanical strength, wear, corrosion resistance, and easy fabrication, once they have relatively low processing temperatures and lower density compared to metal and ceramic materials 1–3,5 …”

Section: Introductionmentioning

confidence: 99%

Polypropylene/talc/graphene nanoplates (GNP) hybrid composites: Effect of GNP content on the thermal, rheological, mechanical, and electrical properties

Sarturato

Anjos

Marini

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Polypropylene (PP)/talc composites are used extensively in the automotive, aeronautical, and consumer goods industries; however, the increasing demand for more efficient, safe, and less environmentally impact materials makes it necessary to include new reinforcements. In this way, the use of graphene nanoplates (GNP) is a good alternative because this carbon‐based material allows the achievement of new multifunctional nanocomposites with improved properties and process optimization. In this work, PP/talc (80/20) composites were prepared with the addition of 1, 3, 5, and 7 wt% of GNP using the extrusion process and injection molding. Morphological, thermal, rheological, mechanical, electrical, and electromagnetic characterizations were performed. The addition of GNPs led to a linear reduction in the melt flow index (MFI) of the samples. A rheological percolation was observed in the sample with the addition of 7 wt% of GNP. The addition of 5 and 7 wt% of GNP led to significant increases in elastic modulus and Shore D hardness. The electrical and electromagnetic evaluation showed that the increase of GNP in the compositions contributed to improvements in electrical conductivity and permittivity, resulting in a proportional increment in the total attenuation component (SET).

show abstract

“…[41] In addition, as SEBS and EPDM have molecular interactions with PP, impact strength tends to increase greatly, creating tough and flexible materials. [42,43] However, SEBS has PS blocks at the ends of the chain, helping to promote a better balance between stiffness/flexibility, [44] compared to EPDM. The maleic anhydride functionalization process of SEBS and EPDM makes the molecular structure more reactive.…”

Section: Introductionmentioning

confidence: 99%

Reuse of carbon fiber waste to produce composites with polypropylene. The effect of styrene‐(ethylene‐butylene)‐styrene grafted with maleic anhydride and ethylene‐propylene‐diene grafted with maleic anhydride copolymers

et al. 2021

View full text Add to dashboard Cite

Carbon fiber (CF) is a difficult material to recycle, generating accumulation and environmental impacts when disposed of incorrectly. The practice of reuse is being encouraged, aiming to minimize socio-environmental impacts. The present research aimed to develop polypropylene (PP) composites with CF waste, using styrene-(ethylene-butylene)-styrene grafted with maleic anhydride (SEBS-MA) and ethylene-propylene-diene grafted with maleic anhydride (EPDM-MA), as compatibilizers. The composites were processed in a mixer and injection molded. The addition of the CF in the PP matrix did not hinder processability, as verified in torque rheometry. Significant increases were achieved in impact strength and elongation at break, especially in the PP/FC/ SEBS-MA and PP/FC/EPDM-MA composites. Incorporating 15% EPDM-MA reduced the elastic modulus and tensile strength by 23% and 32%, while SEBS-MA by 13% and 23%, relative to PP, respectively, due to the increase in flexibility of the composites. When the PP/FC composites were compatibilized with SEBS-MA and EPDM-MA, there was a higher level of interaction among the phases, generating a higher wettability, as verified in the scanning electron microscopy. Such behavior was important to increase the crystallinity of the compatibilized composites. The composites thermal stability increased significantly, increasing in 40 C, compared to pure PP. In general, the compatibilization with SEBS-MA was more effective, generating better properties.As a consequence, the heat deflection temperature of the composites remained the same as the level of pure PP, suggesting good structural stability. The results are valuable for the recycling area, since CF can be reused as a polymer additive to improve properties.

show abstract

Propriedades mecânicas e morfologia de blendas de polipropileno com Tpes

Cited by 17 publications

References 26 publications

Preparation of flexible and magnetic PA6/SEBS‐MA nanocomposites reinforced with Ni‐Zn ferrite

Preparation of flexible and magnetic PA6/SEBS‐MA nanocomposites reinforced with Ni‐Zn ferrite

Polypropylene/talc/graphene nanoplates (GNP) hybrid composites: Effect of GNP content on the thermal, rheological, mechanical, and electrical properties

Reuse of carbon fiber waste to produce composites with polypropylene. The effect of styrene‐(ethylene‐butylene)‐styrene grafted with maleic anhydride and ethylene‐propylene‐diene grafted with maleic anhydride copolymers

Contact Info

Product

Resources

About