Compatibility, morphology and mechanical properties of polylactic acid/polyolefin elastomer foams

Forghani, E; Azizi, Hamed; Karabi, M; Ghasemi, Ismaeil

doi:10.1177/0021955x16681450

Cited by 9 publications

(9 citation statements)

References 26 publications

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“…When the up to 5 wt% content of POE increase in the PLA matrix, the crystallinity of PLA reduces, and decreasing the crystallinity is accompanied by reducing in tensile strength [11]. Similar results in the case of tensile strength of PLA/POE blends were also achieved by Forghani et al [46]. With respect to different parts of the Figure 5, it is demonstrated that the highest value of tensile strength was obtained by the addition of 2 wt% content of carbon black into the PLA matrix by 67 MPa.…”

Section: Mechanical Properties 331 Tensile Strengthsupporting

confidence: 79%

“…Figure 7b indicates that Young's modulus of the PLA matrix was dramatically raised by increasing carbon black content up to 2 wt% from 300 to 506 MPa. Young's modulus of PLA improves with adding carbon black concentration since these spherical nanoparticles are stiffer than polymer matrix [46]. Liu et al [45] reported that the addition of carbon black nanoparticles up to 5 wt% into the PLA matrix had increased its Young's modulus properly.…”

Section: Young's Modulusmentioning

confidence: 99%

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Achieve balanced stiffness and toughness properties of nanocomposites based on poly(lactic acid)/polyolefin by using fuzzy rule-based system

Daneshpayeh¹,

Ghasemi²,

Ghasemi³

et al. 2022

Express Polym. Lett.

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Using filler and impact modifiers for balancing stiffness and toughness properties is a common strategy for modification of polymer matrices' performance. Nanocomposites based on poly lactic acid/polyolefin elastomer/including multiwalled carbon nanotubes/carbon black nanoparticles (PLA/POE/MWCNTs/CB) were produced using an internal mixer. Fuzzy rule-based system (FRBS) was applied to predict and simulate of mechanical properties of the samples. The fieldemission scanning electron microscopy (FESEM) was applied to determine the state of nanofillers distribution. The FESEM images showed that the carbon black and MWCNTs individually were well distributed. But, the simultaneous addition of nanofillers by more than 1 wt% from each one led to their agglomeration. The results illustrated that the presence of MWCNTs and carbon black separately and simultaneously led to an increase in tensile strength and Young's modulus. The simultaneous presence of them led to an improvement in impact strength by 30%. Also, by incorporating POE into the PLA matrix, a significant increment in impact strength was obtained by 110%. The obtained surface plots from FRBS revealed that there is an interaction between nanofillers effects on the mechanical properties. Finally, a good agreement between the predicted mechanical properties using FRBS and evaluation tests led to extract accurate models with proper R 2 and standard error for all responses.

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Section: Mechanical Properties 331 Tensile Strengthsupporting

confidence: 79%

Section: Young's Modulusmentioning

confidence: 99%

Achieve balanced stiffness and toughness properties of nanocomposites based on poly(lactic acid)/polyolefin by using fuzzy rule-based system

Daneshpayeh¹,

Ghasemi²,

Ghasemi³

et al. 2022

Express Polym. Lett.

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“…Glycidyl methacrylate (GMA) grafted polyolefin elastomers (POE) are often used in polyester blends (Hu et al, 1996;Forghani et al, 2018). Consequently, as PLA shows a good chemical functionality (Sun et al, 2011) it can be combined with POE-g-GMA.…”

Section: Introductionmentioning

confidence: 99%

Thermal, Mechanical and Micromechanical Analysis of PLA/PBAT/POE-g-GMA Extruded Ternary Blends

et al. 2020

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In order to toughen Poly(lactic) acid and binary blends with low PBAT content while maintaining a high biodegradability of the final material, poly(lactic) acid (PLA)/poly(butylene-adipate-co-terephthalate) (PBAT)/ polyolefin elastomer grafted with glycidyl methacrylate (POE-g-GMA) extruded ternary blends have been investigated in this work from a thermal, mechanical, and rheological point of view. The two elastomers have been added in different amounts as dispersed phases into the PLA matrix, paying attention to the final objective: the design of a 90% biodegradable formulation according to EN 13432. These ternary blends exhibited improved impact properties but still low elongation at break. Consequently, to the ternary composition with the best compromise of PLA quantity, biodegradability and thermo-mechanical properties (81 wt.% PLA, 9 wt.% PBAT, and 10 wt.% POE-g-GMA) a small quantity (10 wt.%) of a biobased plasticizer was added in order to further increase the impact properties in parallel with the tensile flexibility. Two types of plasticizers were investigated, one not reactive [Acetyl Tributyl Citrate (ATBC)], and one reactive [Glycidyl ether (EJ-400)]. A micromechanical study, in order to investigate the toughening mechanism of these systems, was carried out on the final formulations. They were also examined by dilatometric tests and elastoplastic fracture mechanics correlating the data obtained to the morphology and to the rheological properties. In conclusion, the best compromise between impact, tensile properties and biodegradability content was achieved using the reactive plasticizer (EJ-400) whose interaction with the matrix is confirmed by the FT-IR analysis.

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“…18 There are many studies in the oxo-material degradability properties. 19,20 Environmental conditions such as humidity and the presence of oxygen can result in a very different biodegradability of the polyethylene. [16] Forty-eight percent biodegradability was measured for the polyethylene including oxo-material after 90 days.…”

Section: Introductionmentioning

confidence: 99%

“…It is comparatively brittle, and therefore, it can be used as an additive to make the degradability of polyethylene higher. 19,20 Environmental conditions such as humidity and the presence of oxygen can result in a very different biodegradability of the polyethylene. It has been shown that the temperature is also an important fact to accelerate the degradation of the polymers in the nature.…”

Section: Introductionmentioning

confidence: 99%

Investigating the degradability of polyethylene using starch, oxo‐material, and polylactic acid under the different environmental conditions

Panahi

Gholizadeh

Hajimohammadi

2020

Asia-Pacific J Chem Eng

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The change in the properties of low-density polyethylene after adding starch, oxo-material, polylactic acid, and their mixture was studied. Different amounts of the additives were added, and films were prepared by using a twin-screw extruder at 150-225 C. By Minitab software, the optimum percentages of the additives were selected. The films were kept under different environmentalconditions including "open atmosphere," "buried underground," and "buried underground with regular daily irrigation" for 6 months. The degradability, tensile strength, elongation at breaking point, and dart impact were measured. Thermogravimetric analysis and FTIR spectrum changes were used to monitor changes. SEM images illustrated that the starch changed the morphology significantly, while other additives did not show remarkable effects. Mechanical and chemical properties changed significantly when starch was added. The highest changes were recorded for the sample with three additives, which was showing the high efficiency of the film decomposition. The highest amount of chemical changes was recorded for the same film. After 6 months, the lowest crystallinity was recorded by DSC and XRD for the same sample. Different environmental conditions showed different effects on the films mechanical properties. However, chemical properties of the films, excluding the film with starch, did not change significantly.

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Compatibility, morphology and mechanical properties of polylactic acid/polyolefin elastomer foams

Cited by 9 publications

References 26 publications

Achieve balanced stiffness and toughness properties of nanocomposites based on poly(lactic acid)/polyolefin by using fuzzy rule-based system

Achieve balanced stiffness and toughness properties of nanocomposites based on poly(lactic acid)/polyolefin by using fuzzy rule-based system

Thermal, Mechanical and Micromechanical Analysis of PLA/PBAT/POE-g-GMA Extruded Ternary Blends

Investigating the degradability of polyethylene using starch, oxo‐material, and polylactic acid under the different environmental conditions

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