Injection-molded PP composites reinforced with talc and nanoclay for automotive applications

Nofar, Mohammadreza; Ozgen, Elif; Girginer, Burcu

doi:10.1177/0892705719830461

Cited by 29 publications

(19 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results given in Table 2 cover melting and crystallization temperatures and enthalpies of the film samples, as determined by differential scanning calorimetry and calculation of the degree of crystallization in per cent. Adding the TC into the PP matrix led neither to a shift in T m (164.4 and 165.4 °C, see Figure 4 ) nor a change in temperature of T c , in agreement with research by others [ 26 , 51 , 52 ]. Nevertheless, TC had an impact on enthalpy, causing a decrease of about 15 J/g (see Table 2 ).…”

Section: Resultssupporting

confidence: 92%

Immobilization of Caraway Essential Oil in a Polypropylene Matrix for Antimicrobial Modification of a Polymeric Surface

et al. 2021

View full text Add to dashboard Cite

This study investigates antibacterial polymer composites based on polypropylene as modified by caraway essential oil at various concentrations, the latter immobilized on a talc. The caraway essential oil is incorporated in the polypropylene by a thermoplastic processing method. Analysis of the morphology of the composites was carried out by scanning electron microscopy. The chemical composition of the caraway essential oil in addition to its efficiency of incorporation and release were evaluated by GC/MS and Pyrolysis-GC/MS techniques, respectively. Determination was made as to the influence of such incorporation on thermal and tensile properties of the samples, while antibacterial activity was evaluated through conducting disk diffusion tests and measurement with adherence to the ISO 22196:2011 standard. It was found that incorporating the caraway essential oil in the samples did not affect the homogeneity of the thermoplastic-processed composites at any studied concentration. Stress–strain analysis confirmed the plasticizing effect of the essential oil in the polypropylene matrix, in addition to which, differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) analysis revealed that the prepared compositions with essential oil exhibited similar thermal properties to neat polypropylene. Results indicated significant antibacterial activity against Staphylococcus aureus and Escherichia coli at the concentration of essential oil of 4.9 ± 0.2 wt% and higher.

show abstract

Section: Resultssupporting

confidence: 92%

Immobilization of Caraway Essential Oil in a Polypropylene Matrix for Antimicrobial Modification of a Polymeric Surface

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Therefore, the generated fibrillar structure of rPET and rPA shows a noticeable reinforcing effect in the rPE material. These results are comparable with the enhancements that short glass fibers or talc particles could induce in the conventional composites 37–40 . The impact strength of rPE was suppressed in the presence of fibrillated rPET and rPA structure which is expected in thermoplastic based composites 37–40 .…”

Section: Resultssupporting

confidence: 79%

“…These results are comparable with the enhancements that short glass fibers or talc particles could induce in the conventional composites. [37][38][39][40] The impact strength of rPE was suppressed in the presence of fibrillated rPET and rPA structure which is expected in thermoplastic based composites. [37][38][39][40] Of note, the reduction of impact strength is less severe in the MFCs reinforced with rPET fibrils than those containing rPA fibrils.…”

Section: Effect Of Reinforcing Polymer Type On the Mfcs Propertiesmentioning

confidence: 86%

Mechanical and viscoelastic properties of polyethylene‐based microfibrillated composites from 100% recycled resources

Nofar

Yenigul

Özdemir

et al. 2021

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

In this study, recycled polyethylene (rPE) based microfibrillated composites (MFCs) were developed while incorporating recycled poly(ethylene terephthalate) (rPET) and recycled polyamide 6 (rPA) as the reinforcing fibrillar phases at a given weight ratio of 80 wt% (rPE)/20 wt% (rPET or rPA). The blends were first melt processed using a twin‐screw extruder. The extrudates were then cold stretched at a drawing ratio of 2.5 to form rPET and rPA fibrillar structures. Next, the pelletized drawn samples were injection molded at the barrel temperatures below the melting temperatures of rPET and rPA. The tensile, three‐point bending, impact strength, dynamic thermomechanical, and rheological properties of the fabricated MFCs were analyzed. The effects of injection molding barrel temperature (i.e., 150°C and 190°C) and extrusion melt processing temperature (i.e., 250°C and 275°C) on the generated fibrillar structure and the resultant properties were explored. A strong correlation between the fibrillar morphology and the mechanical properties with the extrusion and injection molding temperatures was observed. Moreover, the ethylene/n‐butyl acrylate/glycidyl methacrylate (EnBAGMA) terpolymer and maleic anhydride grafted PE (MAH‐g‐PE) were, respectively, melt processed with rPE/rPET and rPE/rPA6 blends as compatibilizers. The compatibilizers refined the fibrillar structure and remarkably influenced mechanical properties, specifically the impact strength.

show abstract

“…When all these aspects are carefully controlled, symmetric morphology distributions with small variations along the thickness are expected. Abrupt geometrical discontinuities and unbalanced mold cooling are common causes affecting part qualities [ 27 , 28 , 29 , 30 ]. Incomplete filling, poor surface finishing, uncontrolled part shrinkage and warpage are generally observed [ 31 , 32 ].…”

Section: Introductionmentioning

confidence: 99%

Morphology-Mechanical Performance Relationship at the Micrometrical Level within Molded Polypropylene Obtained with Non-Symmetric Mold Temperature Conditioning

2021

View full text Add to dashboard Cite

The control of the structural properties of a polymeric material at the micro and nano-metrical scale is strategic to obtaining parts with high performance, durability and free from sudden failures. The characteristic skin-core morphology of injection molded samples is intimately linked to the complex shear flow, pressure and temperature evolutions experienced by the polymer chains during processing. An accurate analysis of this morphology can allow for the assessment of the quality and confidence of the process. Non-symmetric mold temperature conditions are imposed to produce complex morphologies in polypropylene parts. Morphological and micromechanical characterizations of the samples are used to quantify the effects of the processing conditions on the part performance. Asymmetric distribution of temperatures determines asymmetric distribution of both morphology and mechanical properties. The inhomogeneity degree depends on the time that one side of the cavity experiences high temperatures. The spherulites, which cover the thickest of the parts obtained with high temperatures at one cavity side, show smaller values of elastic modulus than the fibrils. When the polymer molecules experience high temperatures for long periods, the solid-diffusion and the partial melting and recrystallization phenomena determine a better structuring of the molecules with a parallel increase of the elastic modulus.

show abstract

Injection-molded PP composites reinforced with talc and nanoclay for automotive applications

Cited by 29 publications

References 29 publications

Immobilization of Caraway Essential Oil in a Polypropylene Matrix for Antimicrobial Modification of a Polymeric Surface

Immobilization of Caraway Essential Oil in a Polypropylene Matrix for Antimicrobial Modification of a Polymeric Surface

Mechanical and viscoelastic properties of polyethylene‐based microfibrillated composites from 100% recycled resources

Morphology-Mechanical Performance Relationship at the Micrometrical Level within Molded Polypropylene Obtained with Non-Symmetric Mold Temperature Conditioning

Contact Info

Product

Resources

About