Thermal and dynamic-mechanical characterization of rice-husk filled polypropylene composites

Rosa, Simone Maria Leal; Nachtigall, Sônia Marlí Bohrz; Ferreira, Carlos Arthur

doi:10.1007/bf03218594

Cited by 45 publications

(30 citation statements)

References 21 publications

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“…The curves of loss tangent (tanδ) versus temperature of several samples are shown in Figure . The transition around 20°C appeared, corresponding to the glass transition temperature of partially crystalline PP, which is similar with other results . The highest peak around 115°C in the curves corresponds to the glass transition temperature of ABS .…”

Section: Resultssupporting

confidence: 89%

The effect of graft copolymers of maleic anhydride and epoxy resin on the mechanical properties and morphology of PP/ABS blends

Luo

et al. 2014

J of Applied Polymer Sci

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In this work, maleic anhydride‐grafted polypropylene (PP‐g‐MAH) and maleic anhydride‐grafted poly(acrylonitrile‐butadiene‐styrene) (ABS‐g‐MAH) at 2 : 1 mass ratio were added as a compatibilizer in the PP/ABS blends. The compatibilizing effect was evaluated by adding the graft copolymers together with epoxy resin/imidazole curing agent (E51/2E4MZ). The reaction in reactive extrusion, morphological structure, and properties of PP and ABS blends were investigated by using infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and X‐ray spectrum, transmission electron microscope (TEM), dynamic thermomechanical analysis (DMA), differential scanning calorimetry (DSC), and mechanical properties tests. The results showed that the compatibilizing effect was greatly improved because of the addition of the graft copolymers together with epoxy resin/imidazole curing agent (E51/2E4MZ) because the link structure of PP‐g‐MAH and ABS‐g‐MAH was formed by the reaction of anhydride group with epoxy group catalyzed by the imidazole. The size of the dispersed phase decreased dramatically, the interfacial adhesion between ABS particles and PP matrix was improved, and the tensile strength and flexural modulus of the PP/ABS blends increased further. The optimizing properties were obtained at 3 phr E51/2E4MZ. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40898.

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Section: Resultssupporting

confidence: 89%

The effect of graft copolymers of maleic anhydride and epoxy resin on the mechanical properties and morphology of PP/ABS blends

Luo

et al. 2014

J of Applied Polymer Sci

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“…7, a second peak at 60 to 80 °C can also be observed, demonstrating that peak intensity and position were affected by the reinforcement content. Literature suggests that these signals are a result of molecular rearrangements within the crystalline phase of the polymer, although it is not clear if they are due to the movement of amorphous sections entrapped within a crystalline section (Rosa et al 2009;Sarlin and Immonen 2013), crystalline rotation (Amash and Zugenmaier 1998), or lamellae displacements (Amash and Zugenmaier 1998;Quan et al 2005). Nevertheless, the increase in this peak temperature can be related to the crystalline fraction of the composite, and this phenomenon agrees with the results obtained by DSC.…”

Section: Dynamic-mechanical Analysis (Dma)supporting

confidence: 77%

Orange Wood Fiber Reinforced Polypropylene Composites: Thermal Properties

et al. 2015

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A major drawback of natural-based composites is the incorporation of reinforcements that are less thermally stable than the matrix; therefore, the thermal properties of the resultant composite material needs to be studied. In this work, orange wood fibers were used to reinforce polypropylene. The effects on the thermal properties of the polymeric matrix were analyzed. To this end, differential scanning calorimetry (DSC), thermogravimetry (TGA), thermomechanical analysis (TMA), and dynamic-mechanical analysis (DMA) were performed. It was found that the degradation of the material took place in two distinct phases: the reinforcement, close to 250 °C, and the matrix, above 340 °C. DSC results showed that fiber reinforcement did not influence the transition temperatures of the materials, although it did affect the polymer crystallinity value, increasing by 7% when the composite is reinforced with 50% of the lignocellulosic reinforcement. The coefficient of expansion obtained by TMA indicated that thermal expansion decreased as the amount of reinforcement increased. DMA assays showed that the reinforcement did not modify the glass transition (20 to 25 °C) temperature and confirmed that the addition of reinforcement increased the crystallinity of the product.

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“…The thermal degradation for pure PP showed no char residue, which indicated that PP decomposed completely at high temperatures. Rosa et al (2009) reported that thermal decomposition of PP leaves a very low residual mass due to formation of volatile compounds by the hydrogen and carbon atoms present in PP chains. …”

Section: Bioresourcescommentioning

confidence: 99%

The Effects of Rattan Filler Loadings on Properties of Rattan Powder-Filled Polypropylene Composites

Nurshamila¹,

Ismail²,

Othman³

2012

BioResources

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This study investigates the effects of filler loading on the properties of rattan powder-filled polypropylene composites. The composites were prepared by incorporating rattan powder of average size 180 µm into polypropylene matrix using a Polydrive Thermo Haake internal mixer. Filler loadings of the rattan powders ranged between 0 and 40 parts per hundred parts of resin (phr). Mechanical, morphological, and thermal properties were studied. The tensile strength, elongation at tensile failure, and impact strength decreased, while stabilization torque, thermal stability, and water absorption increased with increasing filler loading. Tensile modulus increased with addition of rattan powder and eventually decreased at 40 phr filler loading due to the weakening adhesion between the filler and the matrix. The morphological studies of fractured surfaces using SEM confirmed the deterioration in tensile properties.

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Thermal and dynamic-mechanical characterization of rice-husk filled polypropylene composites

Cited by 45 publications

References 21 publications

The effect of graft copolymers of maleic anhydride and epoxy resin on the mechanical properties and morphology of PP/ABS blends

The effect of graft copolymers of maleic anhydride and epoxy resin on the mechanical properties and morphology of PP/ABS blends

Orange Wood Fiber Reinforced Polypropylene Composites: Thermal Properties

The Effects of Rattan Filler Loadings on Properties of Rattan Powder-Filled Polypropylene Composites

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