The crystalline structure of polypropylene waxes: An occurrence of γ crystallographic form

Bednarek, Wojciech Hubert; Marek, A.; Strzemięcka, Beata; Szymańska, Joanna; Paukszta, Dominik

doi:10.1002/pen.26173

Cited by 2 publications

(2 citation statements)

References 36 publications

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“…The DSC curve for pure PP exhibits a crystallization peak at 168.3°C, which coincides with the polymer's melting point. In a study of PP reinforced with glass fiber composite, a crystallization peak of 165°C was observed 18,19 . The peak is caused by the absorption of heat as the polymer chains disentangle and move past each other.…”

Section: Resultsmentioning

confidence: 99%

“…In a study of PP reinforced with glass fiber composite, a crystallization peak of 165 C was observed. 18,19 The peak is caused by the absorption of heat as the polymer chains disentangle and move past each other. By contrast, the DSC curves of the 10% PET ff -PP composite displayed two distinct peaks at 166.5 and 255 C, indicating the melting points of PP and PET fibers, respectively.…”

Section: Differential Scanning Calorimetermentioning

confidence: 99%

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Mechanical behavior analysis of polypropylene composites with waste PET felt fibers

Orkhonbaatar,

Lee,

M.N.

et al. 2023

Polymer Engineering & Sci

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The utilization of plastic waste is another way to protect the ecology and reduce plastic pollution, which researchers and industries have been effectively focusing on for the last decade. Polyethylene terephthalate felt (PETf) is a packaging material abundantly utilized in the automotive sector and is released as waste, and its popularity as an industrial waste necessitates attention to proper disposal. Therefore, the current study utilized waste PETf as a reinforcement (5–15 wt%) for a polypropylene (PP) matrix using various molding approaches, in light of the higher aspect ratio of the fibers. In the first approach, the fibers were extracted from PETf through a mechanical process, and various percentages of PET felt fibers (PETff) were extruded with PP pellets, followed by injection molding. Second, PETf was directly laid on a PP sheet and processed by compression molding. The tensile strength, tensile modulus, and morphological and spectral properties of the fabricated composites were evaluated. Morphological and spectral analyses explain the distribution and interaction of the fibers in the PP matrix. The 10%PETff enhanced the tensile strength and modulus of PP by 37.3% and 52.15%, respectively. Conversely, the 1.5% malic anhydride‐g‐PP (MAPP)‐PP/PETf composites showed similar tensile behavior, with values of approximately 41.53 MPa and 1.6 GPa. In addition, the tensile strength significantly increased by 35.75% with the addition of MAPP. Overall, the current study demonstrates a well‐structured research design that effectively employs waste PETf as reinforcement for PP composites. The mechanical strength of these composites makes them highly versatile and renders them suitable for a wide range of applications, from automotive packaging to the manufacturing of high‐performance automotive components.Highlights Utilized waste PET as reinforcement for manufacturing of PP composite. PET and PP interacted in a self‐reinforcing manner. Injection and compression molding techniques used for PET/PP composites. Repurposing waste PET by compression molding is eco‐friendly practices. PET fibers significantly improved mechanical properties of PP composites.

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Section: Resultsmentioning

confidence: 99%

Section: Differential Scanning Calorimetermentioning

confidence: 99%

Mechanical behavior analysis of polypropylene composites with waste PET felt fibers

Orkhonbaatar,

Lee,

M.N.

et al. 2023

Polymer Engineering & Sci

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Morphological, thermal and mechanical properties of wheat‐straw reinforced copper nanocomposite

Haque,

Chowdhury,

Khan

2024

Polymer Composites

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The work summarizes an innovative nanocomposite including synthesized copper nanoparticle (CuNP) impregnated wheat straw (WS) (the agronomic waste from an wheat plant) reinforced unsaturated polyester resin has been established. The addition of nanoparticles (NPs) increased the antifungal properties (~11%), durability (~9%), and strength (~39%) of the composites. Therefore, these nanoparticles have been synthesized from a copper chloride dihydrate precursor and they have been impregnated into wheat straw via cationization. This copper‐impregnated wheat straw (CuIWS) was formulated and employed to create a strong and long‐lasting nanocomposite with unsaturated polyester resin. Their morphological, mechanical, chemical, biodegradability (BD), and thermal properties were estimated and relationships were explicated systematically. Particularly, the tensile strength of polyester resin, crude and treated WS (cationized and copper‐impregnated) composites were 11.70, 14.20, 20.92, and 22.34 N/mm2 respectively. Therefore the reinforcement capability for crude, cationized and copper‐impregnated WS composites increased by ~22%, 75%, and 92% respectively. The residual ash was just about 16.23%, 12.04% and 6.56% for copper impregnated wheat straw composite (CuIWSC), Cationized wheat straw composite (CWSC) and untreated wheat straw composite (UTWSC) respectively point to the existence of ~4.1% Cu incorporated into the wheat straw which holds up the energy dispersive x‐ray (EDX) spectra of ~4.2% copper content. Thermogravimetric analysis (TGA) indicates that the nanocomposites are stable up to 325°C. These nanocomposites also show superlative crystallinity compared to other ones. Water uptake capacity followed typical Fickian diffusion law. The developed nanocomposites might be suitable for automobile and aircraft parts, furniture, and other indoor to outdoor applications.Highlights TS of the composites increased by increasing the WS filling up to 15%. The crystallinity increased after the addition of nanoparticles. The typical water uptake properties followed the Fickian diffusion rule. Incorporation of nanoparticles increased 11% antifungal properties. The developed nanocomposites are used for inside and outside applications.

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The crystalline structure of polypropylene waxes: An occurrence of γ crystallographic form

Cited by 2 publications

References 36 publications

Mechanical behavior analysis of polypropylene composites with waste PET felt fibers

Mechanical behavior analysis of polypropylene composites with waste PET felt fibers

Morphological, thermal and mechanical properties of wheat‐straw reinforced copper nanocomposite

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