Characterization of EVA/PLA Blends When Exposed to Different Environments

Moura, I.; Botelho, Gabriela; Machado, A. V.

doi:10.1007/s10924-013-0614-y

Cited by 32 publications

(30 citation statements)

References 31 publications

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“…This figure depends on several factors: chemical, fractional and particle size composition of the filler, its packed density, content of leachable components, and presence of EVA in a composite. Addition of EVA improves biodegradability of all composite materials (except materials with leaves), which is explained by amorphization of the polymer matrix (Table ) and partial biodegradability of EVA itself .…”

Section: Resultsmentioning

confidence: 99%

Preparation, structure, and properties of biocomposites based on low‐density polyethylene and lignocellulosic fillers

2014

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This article examines compositions based on low density polyethylene containing various lignocellulosic fillers–flax shive, sunflower husk, hay, birch leaves, lignosulfonate, and banana skin. The ethylene‐vinyl acetate copolymer is used as a compatibilizing component. The article is aimed at identifying the main factors determining biodegradation rate of the compositions. Thermal resistance and morphology of the fillers, mechanical and structural characteristics of the compositions, and their stability in aqueous media and ground soil were studied. The influence of the filler particle shape on the resistance of the compositions against various effects was shown. It was found that an increase in the length‐to‐diameter (L/D) ratio of the filler particles increases strength and water absorption, reduces melting viscosity, and accelerates biodegradation in soil. POLYM. COMPOS., 37:1461–1472, 2016. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 99%

Preparation, structure, and properties of biocomposites based on low‐density polyethylene and lignocellulosic fillers

2014

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“…Among these polymers, EVA is a good candidate to be blended with PLA owing to its high flexibility and excellent impact strength . EVA is commercially available as rubbers, thermoplastic elastomers, and plastics, depending mainly on its vinyl acetate (VA) content and molecular weight .…”

Section: Introductionmentioning

confidence: 99%

“…PLA eventually disintegrates into harmless components, such as carbon dioxide, water, and other nontoxic small molecules under compost conditions in landfills [6,8]. It can be used in a variety of applications owing to its several advantages such as high tensile strength, elastic modulus and transparency, good processing performance, recyclability, and environmentally friendly characteristics [1][2][3][5][6][7][9][10][11][12]. Additionally, PLA can be fabricated by many standard plastic processes, including injection, compression and blow molding, extrusion, thermoforming, and film forming [9].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…However, the large-scale commercial application of PLA is limited owing to its inherent disadvantages, such as brittleness, poor melt strength, and high cost [1][2][3][5][6][7][10][11][12]. To work out some of these drawbacks, PLA needs soft/flexible polymers and fillers to improve its flexibility, toughness, strength, and workability for practical applications [1][2][3][5][6][7][10][11][12]. A number of researchers have modified PLA by incorporating the second polymeric minor phase, such as polycaprolactone [7,13], poly(butylene succinate) [1], thermoplastic polyurethane [4], ethylene vinyl acetate (EVA) copolymer [3,5,14], poly(butylene adipate-co-terephthalate) [6,10], epoxidized natural rubber [11], and linear low-density polyethylene [12] in an attempt to improve the properties and processability.…”

Section: Introductionmentioning

confidence: 99%

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Poly(lactic acid)/ethylene vinyl acetate copolymer blend composites with wood flour and wollastonite: Physical properties, morphology, and biodegradability

Chaiwutthinan

Chauyjuljit

Thipkham

et al. 2019

Vinyl Additive Technology

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In the present study, poly(lactic acid) (PLA), a biodegradable plastic, was melt‐blended with five weight percentages (10–50 wt%) of ethylene vinyl acetate (EVA) copolymer, a non‐biodegradable plastic, having a vinyl acetate content of 19 wt% and a melt flow index of 530 g/10 min, on a twin screw extruder, followed by an injection molding. The blends at 10 and 20 wt% EVA revealed a noticeably increased impact strength and strain at break over the pure PLA, and the blend at 10 wt% EVA exhibited the highest impact strength and strain at break. The 90/10 (wt%/wt%) PLA/EVA blend was then selected for preparing either single or hybrid composite with wood flour (WF) and wollastonite (WT). The filler loading was fixed at 30 parts by weight per hundred of resin throughout the experiment, and the WF/WT weight ratios were 30/0, 20/10, 15/15, 10/20, and 0/30. The prepared composites were examined for their mechanical and thermal properties, melt flow index, flammability, water uptake, and biodegradability as a function of composition. All the composites showed a filler‐dose‐dependent decrease in the impact strength and strain at break, but an increase in the tensile and flexural modulus (optimal at 0/30 WF/WT) and tensile and flexural strength (optimal at 30/0 WF/WT) as compared with the neat 90/10 (wt%/wt%) PLA/EVA blend. In addition, the melt flow index, char residue, anti‐dripping ability, water uptake, and biodegradability of the composites were also higher than those of the neat blend. J. VINYL ADDIT. TECHNOL., 25:313–327, 2019. © 2019 Society of Plastics Engineers

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A comparison of rheology and FTIR in the study of polypropylene and polystyrene photodegradation

Mylläri

Ruoko

Syrjälä

2015

J of Applied Polymer Sci

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Rheology and FTIR spectroscopy are compared as methods to study the degree of photodegradation in polypropylene (PP) and polystyrene (PS) sheets. The materials are hot pressed, artificially photo-aged with fluorescent lights for 4-2048 h and then measured with a rotational rheometer and FTIR. Both materials show a tendency for chain scission which can be seen as a reduction in viscosity. Changes in PP can be observed with both methods after 256 h of irradiation. Changes in PS become significant in rheology after 64 h but in FTIR only after 1024 h of irradiation. Due to the different chemical nature of the materials, the degradation of PS is rather linear with exposure, whereas the degradation of PP is more exponential. Using the zero shear viscosities obtained through extrapolations of the Cole-Cole and Carreau-Yasuda models, relative molecular weights are estimated with the aid of the power-law relationship between these two. These results are compared with the carbonyl indices determined from the FTIR spectra. Rheology is found to be a viable alternative for FTIR in certain situations.

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Characterization of EVA/PLA Blends When Exposed to Different Environments

Cited by 32 publications

References 31 publications

Preparation, structure, and properties of biocomposites based on low‐density polyethylene and lignocellulosic fillers

Preparation, structure, and properties of biocomposites based on low‐density polyethylene and lignocellulosic fillers

Poly(lactic acid)/ethylene vinyl acetate copolymer blend composites with wood flour and wollastonite: Physical properties, morphology, and biodegradability

A comparison of rheology and FTIR in the study of polypropylene and polystyrene photodegradation

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