Processing and characterization of polypropylene (PP)/ethylene–vinyl acetate (EVA) blend-based glassy carbon (GC) composites

Anjos, Erick Gabriel Ribeiro dos; Morgado, Guilherme Ferreira de Melo; Vieira, Leonardo de Souza; Souza, Gabriel Portilho Monteiro de; Souza, Maria Fernanda Romeu Lino de; Nogueira, Iury Araújo; Rodrigues, Lina Dayse Alcântara; Wearn, Yves Nicolau; Passador, Fábio Roberto

doi:10.1007/s42452-020-3190-5

Cited by 6 publications

(3 citation statements)

References 44 publications

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“…The EVA is able to absorb impact energy more effectively due to its low glass transition temperature compared to PP and thus EVA can be used as an impact modifier for PP especially at low temperatures. 4,5 Presence of nano fillers in PP/elastomer blends affects the morphology of the elastomer particles. Silica-based nano-sized fillers were reported to reduce the size of EVA droplets and provide a homogeneous dispersion, regardless of viscosity of EVA and type of the silica filler.…”

Section: Introductionmentioning

confidence: 99%

Dynamic and static mechanical properties of PP/EVA blend nanocomposites: Effects of type of masterbatch preparation technique and nature of compatibilizer

Tekay

Doğu

Şen

2021

Journal of Composite Materials

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Polypropylene (PP)/poly (ethylene-co-vinyl acetate) (EVA) nanocomposites were prepared with use of 3 wt% of organophilic halloysite nanotubes (Org-HNTs) and 3 types of compatibilizers in two steps. First, masterbatchs of EVA and the compatibilizers with the Org-HNT were prepared by two different preparation techniques; melt masterbatch (MM) and solution masterbatch (SM). The masterbatchs were then melt compounded with PP in the second step. Special attention was paid to effects of nature of compatibilizer and masterbatch preparation technique on morphology-mechanical property relationship for the composites. Poly(ethylene-vinyl acetate-carbon monoxide) (EVACO) and maleic anhydride grafted EVA (EVA-g-MA) were used as EVA-based compatibilizers which gave a homogeneous distribution of the nanotubes in the matrix and at the matrix-elastomer interphase as compared to maleic anhydride grafted PP (PP-g-MA). The both masterbatch techniques provided a core-shell morphology composed of nanotubes as core surrounded with elastomer phase as a shell, which led to higher toughness and impact resistance for the composites. Particularly, the EVACO compatibilizer provided the highest toughness, tensile modulus and impact resistance for 3% Org-HNT loaded nanocomposite produced with the SM technique. The same nanocomposite was found to act as an effective damper with an optimum modulus in a broad range of temperature and show a relatively higher creep resistance than the counterpart produced with the MMT technique. It also exhibited 66% higher scratch resistance compared to the PP/EVA blend, which makes it advantageous for the visible parts in automotive applications.

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Section: Introductionmentioning

confidence: 99%

Dynamic and static mechanical properties of PP/EVA blend nanocomposites: Effects of type of masterbatch preparation technique and nature of compatibilizer

Tekay

Doğu

Şen

2021

Journal of Composite Materials

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“…The enthalpy of fusion (∆H m ) was directly obtained by DSC in single heating, the melting enthalpy of the 100% crystalline PP (∆H m °) was taken as 207 J/g, 24 Ø res is the weight fraction of the CFRP residue in the polymer. The melting temperature (T m ), ∆H m , and X c were obtained for all compositions during the first heating scans.…”

Section: Methodsmentioning

confidence: 99%

A viable strategy to recycle post-used carbon fiber thermoset composites as a multi-functional filler for PP composites

Montagna

Almeida

Batista

et al. 2023

Journal of Thermoplastic Composite Materials

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The correct destination of this post-used of carbon fiber (CF) reinforced epoxy composites, is considered noble since their manufacturing process involves high costs and advanced technologies. This work aimed to study the feasibility of mechanical recycling of CF/epoxy composites for nobler applications, such as non-structural internal components, antistatic packaging, or electronics housings. The CF/epoxy residues (CFRPres.) were collected from parts of the aerospace industry, selected, and ground, followed by granulometric separation. Then, the CFRPres. particles were incorporated as filler and/or partial reinforcement in a polypropylene (PP) matrix to obtain a new thermoplastic composite using double-screw extrusion processing, followed by hot compression molding to obtain standardized specimens. The quality of the composites obtained was evaluated through mechanical tests (tensile test, Izod impact strength, and Shore D hardness), thermal (differential scanning calorimetry), electric (impedance spectroscopy, electromagnetic), and morphological characterization (scanning electron microscopy). The addition of 30 wt% of CFRPres. in the PP matrix increases the electrical conductivity by seven orders of magnitude and exhibits semiconductor behavior, and increases 168% in the elastic modulus. As for the electromagnetic properties, increasing the content of residues in the composites also occurs a substantial increase in the relative permittivity. In addition, the development of composites from the incorporation of residues from the aerospace sector proved viable in applications where the impact strength, rigidity, and hardness are crucial, even for the high content of residues aggregate.

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“…The blends of polypropylene/poly ethylene vinyl acetate (PP/PEVA) have received a great deal of interest in textile, automobile and electronic industries, thanks to their outstanding properties [1][2][3][4][5]. PP is a thermoplastic polymer with low cost, high chemical resistance, high processability and electrical insulation [6].…”

Section: Introductionmentioning

confidence: 99%

Influence of organoclay and nitroxylether on the rheological, thermal and flame-retardant properties of co-continuous PP/EVA blends

Kashani

Gharavani

Jaberi

et al. 2021

Plastics, Rubber and Composites

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Effect of concurrent inclusion of two type fillers, i.e. OMMT and NOR, on rheological, morphological, thermal and flame retardant properties of the PP/PEVA blends has been studied. The co-continuous morphology became finer with OMMT, NOR and OMMT/NOR inclusion. The result of rheological study revealed that the polymer blend and the NOR loaded composite possess liquid-like, whereas the OMMT composites represent solid-like behavior. Moreover, in OMMT loaded composite, a G' and G" crossover in low frequency range appeared due to formation of network-like structure between OMMT layers. Thermogravimetric analysis corroborated the concurrent inclusion of OMMT and NOR in nitrogen atmosphere decreases To by 2%, increases the T max1 by 0.9% and increases T max2 by 2% comparing the blended composition. The results of microscale combustion calorimetry showed that concurrent incorporation of OMMT and NOR decreases the peak heat release rate and total heat release by 32% and 4% comparing the polymer blend, respectively.

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Processing and characterization of polypropylene (PP)/ethylene–vinyl acetate (EVA) blend-based glassy carbon (GC) composites

Cited by 6 publications

References 44 publications

Dynamic and static mechanical properties of PP/EVA blend nanocomposites: Effects of type of masterbatch preparation technique and nature of compatibilizer

Dynamic and static mechanical properties of PP/EVA blend nanocomposites: Effects of type of masterbatch preparation technique and nature of compatibilizer

A viable strategy to recycle post-used carbon fiber thermoset composites as a multi-functional filler for PP composites

Influence of organoclay and nitroxylether on the rheological, thermal and flame-retardant properties of co-continuous PP/EVA blends

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