Synergistic effects of organoclay Cloisite 15A on recycled polyethylene terephthalate

Honorato, Luciana Ribeiro; Rodrigues, Patrícia de Fátima; Silva, Adriana A.; Moreira, Luciano Pessanha

doi:10.1016/j.jmrt.2020.09.038

Cited by 7 publications

(9 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Organoclays have been used in the past to improve plastic miscibility and develop new materials with high performance. Recently, the literature has shown an improvement in the physical properties and processability in recycling plastics incorporating organoclays [11,12]. Thus, upgrading recycled plastics using organoclays or nanoclays can generate value-added waste plastics.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Intercalation and Dispersion of Organoclays on Energy Demand in the Extrusion of Recycled HDPE/PP Nanocomposites

Rigail-Cedeño

Vera-Sorroche²,

García-Mejía

et al. 2022

Energies

View full text Add to dashboard Cite

Few studies have drawn on any systematic research into the energy demand to produce polymer-based nanocomposites. Regarding the problem, it is well-known that single screw extrusion is an energy-intensive process, so the incorporation of energy meters must be considered to examine the energy efficiency of the process. In this study, the effect of a nanoclay addition on the energy demand of the extrusion process was examined by extruding recycled high-density polyethylene (rHDPE) and recycled polypropylene (rPP) with a gradual compression screw with both dispersive and distributive mixers. The rHDPE/rPP was modified by adding commercial organoclay (OMMT) (3 wt%) and olefin block copolymer (OBC) (5 wt%) as compatibilizers. The energy consumption was measured on the total energy of the extruder machine. Mass throughput (MT) and specific energy consumption (SEC) were obtained at different screw speeds (10, 20, 30, 40, 50 RPM). The SEC of OMMT and OMMT/OBC nanocomposites was 25–50% lower than rHDPE/rPP, especially at higher throughputs. X-ray diffraction (XRD) and scanning electron microscope (SEM) illustrated the degree of intercalation and dispersion of the organoclay at different screw speeds. Better organoclay intercalation and dispersion were found at lower temperatures. Rheological curves showed a decrease in the viscosity at extrusion rates of nanocomposite mixtures. Melt temperature measured at die exit was reduced in the presence of organoclay over the screw speeds studied. This work suggests that the processing of rHDPE/rPP based nanocomposites can result in minor costs when processing conditions are carefully selected.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of the Intercalation and Dispersion of Organoclays on Energy Demand in the Extrusion of Recycled HDPE/PP Nanocomposites

Rigail-Cedeño

Vera-Sorroche²,

García-Mejía

et al. 2022

Energies

View full text Add to dashboard Cite

show abstract

“…Nanoclays are attracting the attention of the academic and industrial communities due to their attractive attributes such as aspect ratio and tailorable surface properties. [24][25][26] Among clay nanoparticles, montmorillonite (MMT) received tremendous interest due to their capability to form synergy with other fillers at fairly low content (>5 wt%) to develop advanced hybrid (nano)composites for varies engineering applications. [26,27] The resulting hybrid (nano)composites present peculiar properties such as high chemical resistance to solvents, excellent barrier properties, high mechanical performance, and high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…[28] MMT or/and other layered silicates are inherently hydrophilic which makes them incompatible with hydrophobic matrices. [24] It has been recognized that the addition of the second fillers could facilitate the dispersion and enhance the interfacial interaction with the host matrix, hence reduce the overall production cost associated with the use of coupling agents or surfactant to improve both dispersion and interaction of the MMT with the host matrix. [28,29] The combination of MMT and EG has been studied in the literature.…”

Section: Introductionmentioning

confidence: 99%

The effect of expanded graphite/clay nanoparticles on thermal, rheological, and fire‐retardant properties of poly(butylene succinate)

et al. 2021

View full text Add to dashboard Cite

In this study, the effect of clay nanoparticles on the flame retardancy, thermal stability, thermal degradation kinetics and rheological properties of poly(butylene succinate) (PBS)/expanded graphite (EG) composites were investigated. The composites were prepared by melt blending, followed by melt compression. The results indicated that the presence of clay, improved the dispersion of the EG, as confirmed by exhibited significant increases in the rheological properties (storage modulus (G 0 ), loss modulus (G 00 ) and complex viscosity (η)) when compared to the pristine PBS. The presence of Cloisite 15 A organoclay, however, decreased the overall thermal stability of the composite material, due to its catalytic effect. The degradation kinetics revealed that the presence of EG can impede the clay's catalytic effect on the degradation process of PBS. Based on the comparison between PBS and PBS/EG composites, the flame retardancy improved after the addition of clay due to formation of char, which acted as barrier layer against heat, oxygen, and flammable gases.

show abstract

“…Among the numerous kinds of polymer-nanomaterial composites, polypropylene/Cloisite15A has attracted a lot of interest among academics and industrial researchers due to significant improvement in thermal, physical, and mechanical properties and their different applications achieved by a small addition of nanoclay. [1][2][3][4] To improve the properties of PP, a uniform distribution of filler in the polymer matrix, strong interface adhesion between nanofiller and polymer matrix and synergy between nanofillers are required. 5,6 The thermoplastic PP is widely used in hygiene coatings as well as automobile and home textiles industries.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on thermal and mechanical behaviors of polypropylene grade 552R/Cloisite 15A nanocomposites suitable for yarn applications

Farahani

Parvareh

Moraveji

et al. 2021

Polymers and Polymer Composites

View full text Add to dashboard Cite

The investigation of polypropylene (PP)/clay nanocomposites has received considerable scientific and technological attention during the last decades due to their good mechanical and barrier properties. In the present article, the effects of adding Cloisite15A (C15A) nanoclay in polypropylene (PP) were investigated. PP nanocomposites were prepared by a direct melt mixing method. For better dispersion of C15A, 30 wt% of nanoclay masterbatch was first prepared by melt mixing of PP matrix and acrylic acid grafted PP oligomer (PP- g-AA) in a compounder, before being used to produce nanocomposites with 2 and 5 wt% of C15A. The aim of this work was to used nanoclay filled nanocomposites with suitable properties for cable application like good flame-retardant property; improve dye-ability and resilience of polypropylene. The XRD results indicated an intercalated layer structure for nanocomposites, The SEM examination showed satisfactory dispersion of nanoclay in 2 wt% of C15A and some degree of agglomeration in 5 wt% of C15A. DSC analysis indicated that C15A acts as a nucleating agent and increases crystallinity in the nanocomposite. TGA showed with increasing nanoclay, heat resistance was improved and degradation temperatures increased. Limiting oxygen index (LOI) tests showed increased flame retardancy from 25% for neat polypropylene t0 32.2% for nanocomposites of 5 wt% of C15A. The tensile modulus was improved from 423 MPa for neat polypropylene to 474 MPa for nanocomposites with 5 wt% of C15A. This result indicates that increasing C15A content had a suitable effect on the tensile properties. Melt spinning investigation on low oriented yarn (LOY), draw textured yarn (DTY), and fully drawn yarn (FDY) of 2 wt% C15A nanocomposite showed a reduction of linear density for FDY and an increase of the shrinkage. Furthermore, the obtained results for the improvement of dye-ability and compression resilience showed that PP/C15A is appropriate for textile products.

show abstract

Synergistic effects of organoclay Cloisite 15A on recycled polyethylene terephthalate

Cited by 7 publications

References 43 publications

Effect of the Intercalation and Dispersion of Organoclays on Energy Demand in the Extrusion of Recycled HDPE/PP Nanocomposites

Effect of the Intercalation and Dispersion of Organoclays on Energy Demand in the Extrusion of Recycled HDPE/PP Nanocomposites

The effect of expanded graphite/clay nanoparticles on thermal, rheological, and fire‐retardant properties of poly(butylene succinate)

Study on thermal and mechanical behaviors of polypropylene grade 552R/Cloisite 15A nanocomposites suitable for yarn applications

Contact Info

Product

Resources

About