Reactive compatibilization as a proper tool to improve PA6 toughness

Luna, Carlos Bruno Barreto; Siqueira, Danilo Diniz; Ferreira, Eduardo da Silva Barbosa; Araújo, Edcleide Maria; Wellen, Renate Maria Ramos

doi:10.1088/2053-1591/ab6e62

Cited by 16 publications

(16 citation statements)

References 48 publications

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“…Moreover, there was a significant reduction in the ABS average particle size, indicating a compatibility increase. The dispersed phase refinement is a dominant factor in the final result because it increases the interfacial area and improves the energy dissipation process under impact 46,47 . Seemingly, the PP/ABS/SEBS blends have a critical concentration wherein one can tailor the compatibility and the morphology stability.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the SEBS copolymer in the compatibility of PP/ABS blends through mechanical, thermal, thermomechanical properties, and morphology

Luna

Siqueira

Araújo

et al. 2021

Polymers for Advanced Techs

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Polypropylene (PP) blends with acrylonitrile‐butadiene‐styrene (ABS) were prepared using the styrene‐ethylene‐butylene‐styrene copolymer (SEBS) as a compatibilizing agent. The blends were prepared in a co‐rotational twin‐screw extruder and injection molded. Torque rheometry, Izod impact strength, tensile strength, heat deflection temperature (HDT), differential scanning calorimetry, thermogravimetry, and scanning electron microscopy properties were investigated. The results showed that there was an increase in the torque of PA6/ABS blends with SEBS addition. The PP/ABS/SEBS (60/25/15%) blend showed significant improvement in impact strength, elongation at break, thermal stability, and HDT compared with neat PP. The elastic modulus and tensile strength have not been significantly reduced. The degree of crystallinity and the crystalline melting temperature increased, indicating a nucleating effect of ABS. The PP/ABS blends compatibilized with 12.5% and 15% SEBS presented morphology with well‐distributed fine ABS particles with good interfacial adhesion. As a result, thermal stability has been improved over pure PP and the mechanical properties have been increased, especially impact strength. In general, the addition of the SEBS copolymer as the PP/ABS blend compatibilizer has the advantage of refining the blend's morphology, increasing its toughness and thermal stability, without jeopardizing other PP properties.

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Section: Resultsmentioning

confidence: 99%

Evaluation of the SEBS copolymer in the compatibility of PP/ABS blends through mechanical, thermal, thermomechanical properties, and morphology

Luna

Siqueira

Araújo

et al. 2021

Polymers for Advanced Techs

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“…Furthermore, as the molecular structure of EPDM-MA has good interaction and miscibility with the PP matrix, it possibly favored for the deformation mechanism. [57] More significant increases in elongation at break were achieved with the PP/FC/SEBS-MA composites, suggesting a greater synergistic effect in the system. Apparently, the PP/FC/SEBS-MA composites present a critical concentration to improve the level of elongation at break and the ductility degree.…”

Section: Tensile Propertiesmentioning

confidence: 93%

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

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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.

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“…A Figura 2 ilustra as curvas de torque versus tempo da PA6 pura, do HIPS, do SEBS-MA e das blendas, em função da concentração do compatibilizante. (Wilkinson et al, 1999;Agrawal et al 2008;Luna et al, 2020a) tem mostrado que os grupos anidrido maleico do copolímero reativo reagem com os grupos terminais amina da PA6, formando um grupo imida e resultando em um copolímero in situ na interface. Além disso, o sistema PA6/HIPS/SEBS-MA tem a miscibilidade da molécula de estireno do HIPS e do SEBS-MA.…”

Section: Reometria De Torqueunclassified

“…Essa propriedade não foi afetada com o aumento do teor de MA, somente ocorreu uma manutenção dos valores. Luna et al (2020a) investigaram blendas de poliamida 6 (PA6)/copolímero de etileno-propileno-dieno enxertado com anidrido maleico (EPDM-MA), contendo 1% de anidrido maleico. As blendas foram preparadas em uma extrusora de rosca dupla corrotacional e, posteriormente, os grânulos extrudados foram moldados por injeção.…”

Section: Introductionunclassified

Investigação do desempenho de blendas PA6/HIPS compatibilizadas com SEBS-MA. Efeito do teor do compatibilizante nas propriedades mecânicas, termomecânicas, reometria de torque e na morfologia

Nogueira

Luna

Siqueira

et al. 2021

RSD

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Blendas de poliamida 6 (PA6) com poliestireno de alto impacto (HIPS) foram preparadas, utilizando-se o copolímero de estireno-(etileno-butileno)-estireno enxertado de anidrido maleico (SEBS-MA), como agente compatibilizante. As blendas foram preparadas em uma extrusora de rosca dupla corrotacional e, posteriormente, moldadas por injeção. As propriedades de reometria de torque, resistência ao impacto Izod, temperatura de deflexão térmica (HDT) e microscopia eletrônica de varredura (MEV) foram investigadas. Os resultados mostraram que houve um aumento no torque das blendas de PA6/HIPS com a adição do compatibilizante SEBS-MA. A resistência ao impacto e a HDT aumentaram 56% e 24,5 % em comparação com a PA6 pura, quando a formulação da blenda PA6/HIPS contém 15 pcr de SEBS-MA. Essa blenda apresentou uma maior estabilidade na morfologia, conforme verificado no MEV, com melhor adesão interfacial e menor quantidade de vazios, resultando principalmente na maior resistência ao impacto. Em geral, as propriedades de resistência ao impacto e HDT da PA6 podem ser adaptadas e aprimoradas por meio do desenvolvimento de blendas poliméricas.

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Reactive compatibilization as a proper tool to improve PA6 toughness

Cited by 16 publications

References 48 publications

Evaluation of the SEBS copolymer in the compatibility of PP/ABS blends through mechanical, thermal, thermomechanical properties, and morphology

Evaluation of the SEBS copolymer in the compatibility of PP/ABS blends through mechanical, thermal, thermomechanical properties, and morphology

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

Investigação do desempenho de blendas PA6/HIPS compatibilizadas com SEBS-MA. Efeito do teor do compatibilizante nas propriedades mecânicas, termomecânicas, reometria de torque e na morfologia

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