Tensile properties, thermal conductivity, and thermal stability of short carbon fiber reinforced polypropylene composites

Kada, Djamila; Koubaa, Ahmed; Tabak, Ghezalla; Migneault, Sébastien; Garnier, Bertrand; Boudenne, Abderrahim

doi:10.1002/pc.24093

Cited by 58 publications

(36 citation statements)

References 22 publications

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“…[13][14][15] The development and application of fiber-reinforced polymer composites are constantly growing. [16][17][18] These composites are attractive in a wide range of industries, such as automotive parts for the interior, exterior, and under the hood applications, thanks to their remarkable mechanical performance to cost ratio and ease of mass production. Extrusion compounding followed by either injection molding or blow molding is the process frequently used in manufacturing thermoplastic composites reinforced with chopped glass fibers.…”

Section: Introductionmentioning

confidence: 99%

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

et al. 2020

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Engineered structural materials are required to feature a combination of deformability (ductility) and strength to be considered damage‐tolerant for safety‐critical applications. These two mechanical properties, however, tend to be mutually exclusive, encouraging optimization of the trade‐off between strength and toughness. In this report, an elastomer and a glass fiber were incorporated into a blend of two grades of polypropylene (PP) to improve matrix toughness through both intrinsic and extrinsic toughening mechanisms. This study investigates the impact resistance (at 23°C and −30°C), and strength, stiffness, deformability, and processability of extruded compatibilized glass fiber reinforced thermoplastic polyolefin (TPO) composites at 23°C. For the hybrid composites contribution of different toughening mechanisms in attainment of the final impact strength is governed by the testing temperature and processing (extruder screw) speed. The intrinsic toughening mechanism induced by the presence of the ethylene α‐olefin copolymer is suppressed by the introduction of glass fiber at 23°C, irrespective of screw speed and screw configuration design. The heat distortion temperature (HDT), flexural modulus, and tensile strength exhibit a marked improvement by glass fiber inclusion at 23°C. By evaluating the performance of the composites at −30°C, it was observed that the impact energy of the elastomer modified hybrid composites may be enhanced in the same manner as the glass fibers toughen the brittle unmodified PP matrix. It was noted that contrary to the tensile properties at break, the yield behavior of the composites containing fibers, severely shortened, is independent of the presence of the fibers at 23°C.

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Section: Introductionmentioning

confidence: 99%

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

et al. 2020

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“…Electrical conductivity, σ, in PNCs [3,33,34] is developed mainly by two mechanisms; namely, via the transport of ions or/and electrical charges (including defects) through the polymer in a rubbery state [35] and via the oriented transport of free electrons (hopping and tunneling effects) in the case of electrically conducting fillers [3,25] (Scheme 1b). The most known conducting fillers are the CNTs [4,25], carbon fibers [36], graphene, graphite [5] and metallic particles (Ag, Au, Cu) [37]. The role of crystallinity on σ is indirect as, for example, the formation of crystals may reduce ionic σ via the polymer by disturbing/cutting a few amorphous polymer pathways [23,38] or/and reducing the number of percolating filler pathways due to filler rearrangements upon crystallization [39] (Scheme 1c).…”

Section: Introductionmentioning

confidence: 99%

Effects of Expandable Graphite at Moderate and Heavy Loadings on the Thermal and Electrical Conductivity of Amorphous Polystyrene and Semicrystalline High-Density Polyethylene

et al. 2021

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In this work, we prepared and investigated two series of polymer composites, wherein the matrix was either an amorphous polystyrene (PS) or a semicrystalline high-density polyethylene (HDPE) filled with expandable graphite (EGr) at relatively high loadings within the range 5–55 wt %. For the investigation we employed a thermogravimetric analysis and differential scanning calorimetry to assess the thermal transitions and evaluate the various polymer fractions (crystalline (CF), mobile (MAF) and rigid amorphous (RAF)) in addition to broadband dielectric spectroscopy and a laser flash analysis to evaluate the EGr effects on electrical conductivity, σ, and thermal conductivity, λ, respectively. In PS, EGr was found to impose an increase of the glass transition temperature and a systematic decrease of the corresponding heat capacity change. The latter was rationalized in terms of the formation of an interfacial RAF. No glass transition was recorded for HDPE whereas the fillers increased the CF moderately. As expected, σ increased with the filler loading for both matrices, up to 10−3–10−2 S/cm, resulting in a conductive percolation threshold for electrons at > 8 wt % EGr. Simultaneously, the λ of PS and HDPE were strongly increased, from 0.13 and 0.38 W·K–1·m–1 up to 0.55 and ~2 W·K–1·m–1, respectively. λ demonstrated an almost linear EGr loading dependence whereas the semicrystalline composites exhibited a systematically higher λ.

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“…can be easily transferred from the bulk to the reinforcing phase. [19][20][21][22] It is important to mention that the polymer/particle interphase has a significant impact on the mechanical properties of the polymer nanocomposites. [23,24] However, the mechanical characteristics of the interphase region are significantly different with the surrounding polymer bulk which makes it essential to use specific methods to evaluate its response against the exerted stress.…”

Section: Introductionmentioning

confidence: 99%

The effects of the arrangement of Janus nanoparticles on the tensile strength of blend‐based polymer nanocomposites

Sharifzadeh

Amiri

2020

Polymer Composites

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In this study, the effects of the arrangement of Janus nanoparticles on the tensile strength of the blend‐based polymer nanocomposites were investigated using both experimental and analytical methods. The experimental stage included the evaluation of the effects of the nanoparticle content on the aggregation/agglomeration phenomenon using TEM images. However, the analytical approach was used to study the mechanical properties of the system and also predict its tensile strength considering the effects of the arrangement of Janus nanoparticles, as compatibilizers, at the polymer/polymer interface. It was found that even in those systems containing very low content of Janus nanoparticles (eg, 0.25 wt%), the aggregation/agglomeration phenomenon was inevitable and drastically affected the mechanical properties of the interface region. According to the result, the best compatibilizing performance of Janus nanoparticles was achieved in the case of their monolayer arrangement at the interface. The specific nanoparticles used in this study were first synthesized using a desymmetrization process and then added to the PS/PMMA blend via solution mixing. All of the prepared samples were subjected to the TEM and tensile test, and then, results were then precisely evaluated.

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Tensile properties, thermal conductivity, and thermal stability of short carbon fiber reinforced polypropylene composites

Cited by 58 publications

References 22 publications

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

Effects of Expandable Graphite at Moderate and Heavy Loadings on the Thermal and Electrical Conductivity of Amorphous Polystyrene and Semicrystalline High-Density Polyethylene

The effects of the arrangement of Janus nanoparticles on the tensile strength of blend‐based polymer nanocomposites

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