In depth analysis of micro-mechanism of mechanical property alternations in PLA/EVA/clay nanocomposites: A combined theoretical and experimental approach

Acrylonitrile butadiene styrene composites reinforced with varying contents of PTFE and nanozirconia have been prepared by employing twin screw extrusion technique followed by compression molding. Mechanical properties such as hardness, tensile strength, tensile modulus, elongation at break, impact strength, flexural strength, and flexural modulus have been determined by conducting various mechanical tests according to corresponding ASTM test standards. Thermogravetic analysis (TG/DTA) has been carried out so as to study the thermal stability of the composites. Viscoelastic behavior of composites has been studied using Dynamic Mechanical Analysis (DMA). The results show that addition of nanoparticles has a positive influence on tensile and flexural behavior with appreciable reduction in impact strength. Addition of PTFE enhances the toughness of the materials, however other mechanical properties such as tensile strength and modulus decreases. Fractographs of the composites have been studied in Scanning Electron Microscope. TGA curves show that addition of both PTFE and nanozirconia improves the thermal stability of the composites. DMA studies reveal that addition of nanozirconia improves stiffness with reduction of damping properties, while addition of PTFE results in decrease of storage modulus. POLYM. COMPOS., 39:E1520–E1530, 2018. © 2017 Society of Plastics Engineers

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“…The third model is Halpin‐tsai model and is given below ( Eq . )

\frac{E_{C}}{E_{M}} = (1 + ξ η V_{F}) / (1 - η V_{F})

η = (\frac{E_{F}}{E_{M}} + 1) / (\frac{E_{F}}{E_{M}} + ζ)

ζ = 2 l / t

…”

Section: Resultsmentioning

confidence: 99%

Acrylonitrile butadiene styrene composites reinforced with nanozirconia and PTFE: Mechanical and thermal behavior

Amrishraj

Senthilvelan

2017

Polymer Composites

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“…In this regard, researchers have suggested reactive compatibilization and adding block or graft copolymers . However, another compatibilization strategy has been developed recently, based on the incorporation of inorganic solid nanoparticles . The addition of nanoparticles to a blend affects the interfacial tension as well as the viscosity ratio between phases, and subsequently morphological changes occur.…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

Nematollahi

Jalali‐Arani

Modarress

2019

Polymer International

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In this study, poly(lactic acid)/natural rubber blends and their nanocomposites with silica nanoparticles were prepared via the melt mixing process. The rheology, morphology and impact resistance of the prepared samples were examined depending on the silica content (0–7 phr) and its localization. The results obtained showed that the incorporation of silica below its percolation threshold led to its selective localization in the matrix and mostly near the interface. This was in agreement with the results obtained by calculation of the wetting parameter. At a high content of silica, the silica nanoparticles could also be located in the dispersed phase. Energy dispersive spectroscopy and compositional mapping of oxygen and silicon atoms proved the presence of nanoparticles at the interface. The formation of a silica nanolayer with a thickness of 55–70 nm at the interface was shown by AFM. An optimum amount of nanosilica in the blend, through its interfacial localization and reduction of the natural rubber droplet size (confirmed by SEM test), caused a significant improvement in the impact strength, which was nearly 26 times that of neat poly(lactic acid). © 2019 Society of Chemical Industry

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“…In recent years, due to environmental problems and improper disposal of petrochemical‐based synthetic plastics, plant‐derived biodegradable thermoplastics have received great attention in food/beverage packaging, tissue engineering, medical and pharmaceutical fields . Poly(lactic acid) (PLA) is one of the most extensively studied biodegradable polymers, which is derived from natural and renewable resources like sweet corn, sugar beets and potato .…”

Section: Introductionmentioning

confidence: 99%

High‐performance bio‐based poly(lactic acid)/natural rubber/epoxidized natural rubber blends: effect of epoxidized natural rubber on microstructure, toughness and static and dynamic mechanical properties

Nematollahi

Jalali‐Arani

Modarress

2018

Polymer International

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Attempts have been made to prepare high‐performance bio‐based blends through blending of poly(lactic acid) (PLA) with natural rubber (NR) in the presence of epoxidized natural rubber (ENR) as a compatibilizer. The prepared samples were characterized using differential scanning calorimetry, measuring the tensile properties and impact resistance, scanning electron microscopy, Fourier transform infrared (FTIR) spectroscopy and dynamic mechanical analysis (DMTA). Morphological studies revealed a matrix‐dispersed morphology for all blends, in which the average droplet size significantly decreased with the use of ENR. The elongation at break and impact strength of the blend containing 3 wt% ENR were 45 and 16 times those of neat PLA, respectively. These values are significantly higher than those previously reported for various simple and dynamically vulcanized rubber‐toughened PLAs. The influence of ENR on compatibility was confirmed by rheological tests, FTIR spectra and DMTA. DMTA also showed a marked increase in elastic modulus for the blend in the presence of 3 wt% ENR. The tensile properties and impact resistance were directly dependent on the ENR content and rubber droplet size. © 2018 Society of Chemical Industry

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In depth analysis of micro-mechanism of mechanical property alternations in PLA/EVA/clay nanocomposites: A combined theoretical and experimental approach

Cited by 57 publications

References 52 publications

Acrylonitrile butadiene styrene composites reinforced with nanozirconia and PTFE: Mechanical and thermal behavior

Acrylonitrile butadiene styrene composites reinforced with nanozirconia and PTFE: Mechanical and thermal behavior

Effect of nanoparticle localization on the rheology, morphology and toughness of nanocomposites based on poly(lactic acid)/natural rubber/nanosilica

High‐performance bio‐based poly(lactic acid)/natural rubber/epoxidized natural rubber blends: effect of epoxidized natural rubber on microstructure, toughness and static and dynamic mechanical properties

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