Synthesis of polypropylene/cellulosic fiber composites using Ziegler‐Natta catalyst by <i>in situ</i> polymerization

Marques, Maria V. de Fatima; Lunz, Juliana N.; Oliveira, Patrícia Lopes de

doi:10.1002/pen.24193

Cited by 5 publications

(2 citation statements)

References 21 publications

(19 reference statements)

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“…In another interesting work, in situ polymerization of propylene onto cellulose aided by Ziegler‐Natta catalyst to enhance their compatibility with the PP matrix increased the crystallinity index to 73–77% in comparison with the original fiber (57.6%). They noted that treating fibers with triethylaluminium and stearic alcohol in the presence of the catalyst enhanced their crystallinity by about 20%, as well as reduced thermal degradation [50] . Marques et al [51] .…”

Section: Pp‐based Biocompositesmentioning

confidence: 99%

“…They noted that treating fibers with triethylaluminium and stearic alcohol in the presence of the catalyst enhanced their crystallinity by about 20%, as well as reduced thermal degradation. [50] Marques et al [51] prepared PP/cotton fibers composites using silanized or acetylized fibers derived from textile wastes. Inclusion of acetylized or silanized fibers in PP matrix resulted in enhanced storage and Young's moduli as well as the tensile stress.…”

Section: Pp/agricultural Field Residuesmentioning

confidence: 99%

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Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Wang

Muiruri

Soo

et al. 2022

Chemistry An Asian Journal

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Polypropylene (PP) is among the most widely used commodity plastics in our everyday life due to its low cost, lightweight, easy processability, and exceptional chemical, thermo-mechanical characteristics. The growing awareness on energy and environmental crisis has driven global efforts for creating a circular economy via developing sustainable and eco-friendly alternatives to traditional plastics produced from fossil fuels for a variety of end-use applications. This review paper presents a brief outline of the emerging biobased PP derived from renewable natural resources, covering its production routes, market analysis and potential utiliza-tions. This contribution also provides a comprehensive review of the PP-based biocomposites produced with diverse green fillers generated from agro-industrial wastes, with particular emphasis on the structural modification, processing techniques, mechanical properties, and practical applications. Furthermore, given that the majority of PP products are currently destined for landfills, research progress on enhancing the degradation of PP and its biocomposites is also presented in light of the environmental concerns. Finally, a brief conclusion with discussions on challenges and future perspectives are provided.

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Section: Pp‐based Biocompositesmentioning

confidence: 99%

Section: Pp/agricultural Field Residuesmentioning

confidence: 99%

Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Wang

Muiruri

Soo

et al. 2022

Chemistry An Asian Journal

View full text Add to dashboard Cite

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Obtaining and evaluation of polyethylene nanocomposites with graphene nanoplatelets through in‐situ ethylene polymerization

et al. 2021

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In-situ polymerization of ethylene with graphene has been previously studied; however, the reported nanocomposites exhibit poor filler dispersion, even at low graphene loadings. In the present work, well dispersed and homogeneous graphene nanoplatelets (GNP)-high density polyethylene (HDPE) nanocomposites were obtained in up to 12.5% weight content of graphene through an in-situ polymerization of ethylene in graphene suspensions. The composites' potential as masterbatches was evaluated by melt mixing them with commercial HDPE. The obtained materials exhibited important physicalmechanical properties increases when compared with those of commercial HDPE. To our knowledge, our materials' GNP concentration (≤0.82 wt.%) is the lowest reported, with the composites showing a 27% increase in their maximum tensile strength and a 41% increase in their flexural modulus when compared with blank HDPE. In addition, Raman spectroscopy and scanning electron microscope (SEM) analyses give evidence of the higher exfoliation degree of GNP obtained in the in-situ ethylene polymerizations.

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In Situ polymerization of propylene with carbon nanoparticles. Effect of catalytic system and graphene type

Polschikov

Недорезова

Палазник

et al. 2017

Polymer Engineering & Sci

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Two catalytic systems, metallocene-based and Ti-based were used to synthesize by in situ polymerization the composites of polypropylene and few-layer graphene nanoparticles, prepared by chemical or thermal reduction of graphite oxide. The effect of metallocene and titanium catalytic systems on the properties of nanocomposites and distribution of nanoparticles in polymer matrix is investigated in detail. The data on electrical and thermal properties of nanocomposites are presented. POLYM.ENG. SCI., 00:000-000, a NG was prepared by milling artificial graphite MPG-6 in inert atmosphere from specific surface area S sp 5 8 m 2 /g to S sp 5 480 m 2 /g. Polymerization in liquid propylene at 708C via route 1.FIG. 7. Frequency dependence of ac conductivity for composites synthesized with Cat-1: PP/GNP sonic (a) 1-0.1% wt, 2-1.8% wt, 3-6.2% wt, 4-11% wt, and PP/TRGO sonic (b) 1-0.2% wt, 2-3.3% wt, and 3-10% wt.FIG. 8. Frequency dependence of ac conductivity for composites synthesized with Cat-2. (a) PP/GNP: 1-1.1% wt, 2-2% wt, 3-4.6% wt, and (b) PP/TRGO 1-0.35% wt, 2-2.5% wt, and 3-PP/NG 2.7% wt.

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Synthesis of polypropylene/cellulosic fiber composites using Ziegler‐Natta catalyst by in situ polymerization

Cited by 5 publications

References 21 publications

Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Bio‐Polypropylene and Polypropylene‐based Biocomposites: Solutions for a Sustainable Future

Obtaining and evaluation of polyethylene nanocomposites with graphene nanoplatelets through in‐situ ethylene polymerization

In Situ polymerization of propylene with carbon nanoparticles. Effect of catalytic system and graphene type

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