Efeito dos agentes de compatibilização SBS e SEBS-MA no desempenho de misturas de poliestireno/resíduo de borracha de SBR

Luna, Carlos Bruno Barreto; Silva, Divânia Ferreira da; Araújo, Edcleide Maria; Mélo, Tomás Jefférson Alves de; Oliveira, Amanda Dantas de

doi:10.1590/s1517-707620160003.0061

Cited by 17 publications

(10 citation statements)

References 36 publications

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“…T 0.1 was considered as the initial temperature of the thermal degradation, [ 44,45 ] neat ABS presented higher T 0.1 396.2°C, as expected ABS + MA/DCP regardless MA and DCP content, displayed lower T 0.1 this indicates ABS + MA/DCP directly impacts on reducing the thermal stability, a phenomenon already verified in the literature. [ 36,46 ] ABS + MA/DCP (2.5%/0.5%) presented the lowest temperature for 10% of weight loss most due to the lowest molecular weight, as also verified through MFR.…”

Section: Resultsmentioning

confidence: 60%

Approaches on the acrylonitrile‐butadiene‐styrene functionalization through maleic anhydride and dicumyl peroxide

Luna

Siqueira

Araújo

et al. 2020

Vinyl Additive Technology

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Acrylonitrile‐butadiene‐styrene (ABS) functionalization is industrially important since it can wide the ABS application range. However, grafting of functional groups must be effective. This work aimed evaluating the effectiveness of ABS functionalization in an internal mixer, using maleic anhydride (MA) and dicumyl peroxide (DCP) as initiator, at 2.5% and 5.0%; and 0.3% and 0.5% contents respectively. Torque rheometry, melt flow rate (MFR), titration, Fourier transform infrared spectroscopy (FTIR), contact angle, thermogravimetry (TG), differential scanning calorimetry (DSC), and X‐ray diffraction (XRD) were used to collect the main parameters of produced compounds. For ABS with 5% MA and 0.5% DCP, an efficiency of 62% was reached with the degree of grafting 3.1% MA. FTIR spectra confirmed new band in ABS chain in 1780 cm−1 due to the carbonyl group. Reduction in contact angle and thermal stability were verified, whereas MFR and torque rheometry suggested that viscosity decrease is most due to the molecular weight reduction. In general, MA grafted ABS presented proper functionalization with great potential for applications as reactive compatibilizer.

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Section: Resultsmentioning

confidence: 60%

Approaches on the acrylonitrile‐butadiene‐styrene functionalization through maleic anhydride and dicumyl peroxide

Luna

Siqueira

Araújo

et al. 2020

Vinyl Additive Technology

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“…Heat de ection temperature (HDT) is an extremely important property in the area of polymers, since it indicates the dimensional stability of the materials, at high temperatures [63,64]. Figure 10 shows the results of the heat de ection temperature of BioPE and composites, with and without macaíba oil, respectively.…”

Section: Heat De Ection Temperature (Hdt)mentioning

confidence: 99%

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

et al. 2021

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This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA), using macaíba oil (OM) as a processing aid. The composites were prepared, initially, in an internal mixer and, later, the crushed akes were molded by injection. Mechanical properties (impact, tensile, exural and Shore D hardness), heat de ection temperature (HDT), Vicat softening temperature, differential scanning calorimetry (DSC), thermogravimetry (TG), water absorption, torque rheometry and scanning electron microscopy (SEM) were evaluated. The addition of 30% wood powder to the BioPE matrix increased the elastic modulus (tensile and exural), Shore D hardness and heat de ection temperature (HDT), compared to neat BioPE. These properties were improved when 10% of the PE-g-MA compatibilizer was added, compared to neat BioPE and the non-compatibilized composite. There was a signi cant reduction in the torque of the composites with the addition of macaíba oil, indicating that it improved the processability. In addition, the incorporation of macaíba oil into the composites helped to reduce water absorption, as well as to increase impact strength. SEM micrographs illustrated a greater degree of interfacial adhesion when PEg-MA and macaiba oil were added.

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“…Although not significant, HDT decreased increasing SBRr content, resulting in the small green area represented in the triangle of figure 9(b); it is interesting noting HDT behaves differently when changing ratios between PS and SEBS; at higher PS content (yellow region near vertex), HDT increase is verified. Literature [38][39][40] has reported HDT depends on the rubber content, it is a property that significantly depends on the continuous phase.…”

Section: Heat Deflection Temperature (Hdt)mentioning

confidence: 99%

RSM applied to PS/SBRr/SEBS Blends. Proper tool for maximized properties

Luna

Ferreira

Siqueira

et al. 2020

Mater. Res. Express

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Reusing rubber waste from footwear industry emerges as great practise in order to reduce environmental damage on natural ecosystems. Based on this target, the present work aimed to apply the response surface methodology (RSM) to polystyrene/styrene-butadiene PS/SBRr blends compatibilized with styrene-ethylene-butylene-styrene (SEBS). A mixture planning was applied to PS/SBRr/SEBS blends in order to investigate mechanical and thermomechanical behaviors as response variables. Scanning electron microscopy (SEM) was used to evaluate the morphology of investigated blends, which were melt extruded in a corrotational twin screw extruder and specimens were injection moulded. High impact strength, toughness, elongation at break and thermal deflection temperature (HDT) were achieved at SEBS rich region (∼10%). At PS rich region, tensile strength, Shore D hardness and Vicat softening temperature (VST) were more expressive. Related to morphological character, blends with 10% SEBS presented the highest interfacial adhesion, with high level of plastic deformation. Gathered results show that depending on the composition, properties significantly change, being RSM a proper tool to preview trends on mechanical and thermomechanical properties. In general, PS/SBRr/SEBS blends may be properly used as packaging and building applications.Danilo Diniz Siqueira https:/ /orcid.org/0000-0002-3533-513X Renate Maria Ramos Wellen https://orcid.org/0000-0002-3565-7366

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Efeito dos agentes de compatibilização SBS e SEBS-MA no desempenho de misturas de poliestireno/resíduo de borracha de SBR

Cited by 17 publications

References 36 publications

Approaches on the acrylonitrile‐butadiene‐styrene functionalization through maleic anhydride and dicumyl peroxide

Approaches on the acrylonitrile‐butadiene‐styrene functionalization through maleic anhydride and dicumyl peroxide

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

RSM applied to PS/SBRr/SEBS Blends. Proper tool for maximized properties

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