High flow polypropylene/SEBS composites reinforced with differently treated hemp fibers for injection molded parts

Panaitescu, Denis Mihaela; Vuluga, Zina; Sanporean, Catalina-Gabriela; Nicolae, Cristian Andi; Gabor, Augusta Raluca; Trușcă, Roxana

doi:10.1016/j.compositesb.2019.107062

Cited by 44 publications

(53 citation statements)

References 51 publications

(115 reference statements)

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“…The effect of treating the hemp fibers with NaOH, varying from 5 to 10 wt%, results in marginal increase of 5% in the Young's modulus for 30 wt% hemp/PP composite. While Panaitescu et al studied the 30 wt% hemp fiber/PP composite prepared by extrusion‐injection molding process. The hemp fibers modified by alkali and alkali‐silane treatment resulted in tensile strength increase of 36% and 33%; tensile modulus increase of 17% and 20%; and impact strength (IS) increase of 5% and 7%, respectively, in comparison with untreated hemp/PP composite.…”

Section: Introductionmentioning

confidence: 99%

Effect of chemical treatment on mechanical properties and water diffusion characteristics of jute‐polypropylene composites

et al. 2019

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This work presents the effect of chemical treatment of short jute fibers using alkali, potassium permanganate, and silane treatment on the mechanical properties of jute‐polypropylene (PP) composites. The chemically treated jute fibers were compounded at 30% weight fraction with PP granules in twin‐screw extruder, and the composite pellets were later injection molded to obtain the specimens for the study. The optimum parameters for the respective chemical treatments used in this study were followed as per the literature. The effectiveness of the chemical treatment carried out was studied using Fourier transform infrared spectroscopy and scanning electron microscopy. The mechanical characterization comprising tensile test, flexural test, impact test, and microhardness test were conducted on jute‐PP composites. In addition, the effect of chemical treatment on the water absorption kinetics of the jute‐PP composites was studied. The diffusion coefficient of the jute‐PP composite was determined using the approximate solution of Fick's model. The silane‐treated jute‐PP composites show an increase in tensile strength, tensile modulus, and flexural modulus by nearly 6%, 22%, and 20%, respectively, compared to untreated jute‐PP composite. The moisture absorption study reveals that the silane‐treated jute‐PP composite is the most effective.

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Section: Introductionmentioning

confidence: 99%

Effect of chemical treatment on mechanical properties and water diffusion characteristics of jute‐polypropylene composites

et al. 2019

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“…Thus, at 10% content of elastomer (SIS or SBS) the tensile strength of rPP/SBS composite decreased with 18.5%, and with 17% in the case of rPP/SIS composite compared with neat rPP- Table 6. The reduction in tensile strength property was also reported for virgin PP/elastomer blends and PP waste/elastomer blends [11,58,59]. The authors explained this behavior was due to the incapability of elastomer and polypropylene to form a homogenous phase, and the low strength amorphous rubbery matrix.…”

Section: Mechanical Propertiesmentioning

confidence: 64%

Effect of Styrene-Diene Block Copolymers and Glass Bubbles on the Post-Consumer Recycled Polypropylene Properties

et al. 2020

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The recycled polypropylene (rPP) materials that meet technical requirements such as reducing the dimensions and improving the tensile, elongation, impact strength, thermal stability, as well as melt processing, are required for the manufacturing industry. In this paper, we studied the mechanical and thermal properties of post-consumer rPP by adding both synthesized thermoplastic elastomers, and glass bubbles (GB) by a melt allowing process. Styrene-butadiene (SBS) and styrene-isoprene (SIS) block-copolymers that had a styrene content of 30 wt% were synthesized by anionic sequential polymerization. The obtained post-consumer rPP composites were characterized by optical microscopy, scanning electron microscopy (SEM), mechanical analyses (tensile, density, hardness, VICAT softening temperature (VST), heat deflection temperature (HDT), dynamic mechanical analysis (DMA), IZOD strength) and thermal analyses (differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA)). Weight reduction and improvement of the tensile, elongation, impact strength, thermal stability, as well as melt processing of post-consumer recycled polypropylene (rPP) properties compounded with thermoplastic elastomers and glass bubbles, sustain the use of these formulations for engineering applications.

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“…36%), taking into account the matrix weight fraction in the composites and using the enthalpy of fusion of a pure crystalline polypropylene as 207 J g −1 . [ 39 ] The specific heat capacity C p curves of the samples measured at 20°C min −1 are presented in Figure 6(B). To obtain heat capacity data, an empty pan run and a calibration run with sapphire under identical conditions were performed.…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties and foaming behavior of polypropylene/elastomer/recycled carbon fiber composites

et al. 2021

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Research on lightweight products for transportation industry, to address fuel efficiency and lower carbon footprint, has attracted great attention due to public environmental awareness. Polymer composites containing carbon fiber are boosted by automotive original equipment manufacturers (OEMs) as a replacement for steel. However, their high cost has generated interest to find cost‐effective alternatives. In this report, a recycled carbon fiber and an elastomer are introduced to polypropylene impact copolymers to modify matrix properties in terms of strength and toughness. Fractography analysis is carried out to elucidate the failure mechanisms governing the mechanical performance of the compatibilized carbon fiber reinforced thermoplastic polyolefin (TPO) composites. The results suggest that for the TPO composites, toughened by an ethylene‐1‐octene copolymer, the complex interplay of intrinsic and extrinsic toughnesses in impact resistance is predominantly governed by the presence of the fibers. Incorporating 20 wt% recycled carbon fibers into the matrix resulted in an improvement of the heat distortion temperature (HDT) by 100 °C, and ~ 3.5 and ~ 11.5 times enhancements in tensile strength and stiffness, respectively. Moreover, microcellular foams with expansion ratios higher than 11 and 5 were achieved for the neat samples and reinforced composites, respectively, confirming the foamability of composites with such a high carbon fiber content.

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High flow polypropylene/SEBS composites reinforced with differently treated hemp fibers for injection molded parts

Cited by 44 publications

References 51 publications

Effect of chemical treatment on mechanical properties and water diffusion characteristics of jute‐polypropylene composites

Effect of chemical treatment on mechanical properties and water diffusion characteristics of jute‐polypropylene composites

Effect of Styrene-Diene Block Copolymers and Glass Bubbles on the Post-Consumer Recycled Polypropylene Properties

Mechanical properties and foaming behavior of polypropylene/elastomer/recycled carbon fiber composites

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