Synergistic effects in mechanical properties of PLA/PCL blends with optimized composition, processing, and morphology

Ostafinska, Aleksandra; Fortelný, Ivan; Nevoralová, Martina; Hodan, Jiří; Kredatusová, Jana; Šlouf, Miroslav

doi:10.1039/c5ra21178f

Cited by 135 publications

(126 citation statements)

References 47 publications

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“…As synthetic polyesthers, PCL and PLA possess good interfacial adhesion in their mixtures which can be observed by the exponential increase of modulus from HA/PCL100 to HA/PCL30. However, certain incompatibility could be assumed in HA/PCL70 scaffold due to the presence of small spheres (Figure ), which could be a reason for lower stiffness of HA/PCL30 scaffold. The most unexpected behavior we have found for HA/PCL0 is possessing the lowest stiffness.…”

Section: Resultsmentioning

confidence: 99%

Biomimetic design of bone substitutes based on cuttlefish bone‐derived hydroxyapatite and biodegradable polymers

2018

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Being a major component of bone tissue, hydroxyapatite is the most investigated calcium phosphate in the design and development of bone implants. The high brittleness and poor load-bearing properties have led researchers to manipulate hydroxyapatite performance by applying polymer or metal materials. The present study focuses on biomimetic approach of the hydroxyapatite synthesis from the cuttlefish bone in order to preserve highly porous structure. The low stiffness of hydroxyapatite scaffold was altered by thin polycaprolactone/poly(lactic acid) coating, resulting in remarkably 18-fold increase of Young's modulus. The mechanical test revealed that poly(lactic acid) increases the stiffness of composite scaffolds which depends on the polycaprolactone/poly(lactic acid) volume ratio. The composite scaffolds are bioactive supporting the deposition of new calcium phosphates when incubated in simulated physiological medium for 21 days. Moreover, the culture of human embryonic kidney cells indicated non-cytotoxicity of the composite scaffolds with emphasis on the cell proliferation during three days of culture. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 2018.

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Section: Resultsmentioning

confidence: 99%

Biomimetic design of bone substitutes based on cuttlefish bone‐derived hydroxyapatite and biodegradable polymers

2018

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“…8 indicates that the Tabor's relation, which was originally derived for plastic materials (such as metals and their alloys; [30]), is just the first approximation for viscoelastic materials (such as polymers and their blends; [24]). On the other hand, the direct proportionality between the microhardness and macroscopic yield strength has been well established for the polymer systems [6,31] and the EBM model has been used for the microhardness predictions successfully [6,22,29].…”

Section: Equivalent Box Modelmentioning

confidence: 99%

Strong synergistic improvement of mechanical properties in HDPE/COC blends with fibrillar morphology

Ostafinska

Vacková

Šlouf

2017

Polymer Engineering & Sci

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High‐density polyethylene/cycloolefin copolymer (HDPE/COC) blends with fibrous morphology were prepared. Mechanical properties in the whole concentration range were measured in both macroscale (tensile measurements) and microscale (microindentation hardness testing). Strong improvement of mechanical performance was observed namely for the blends with soft HDPE matrix reinforced with the stiff oriented COC fibers. The combined results from scanning electron microscopy, mechanical properties measurements and theoretical calculations based on predictive models showed that the interfacial adhesion was unusually high, which could be attributed to the excellent compatibility or even partial miscibility of the blend components. The HDPE/COC blends with 10–40% of COC showed the synergistic improvement of the tensile energy to break (ETB) that exceeded the ETB of both individual components. Also the stiffness of the blends, represented by the elastic modulus, the yield strength and the microhardness were very high, above the theoretical values predicted by the equivalent box model. POLYM. ENG. SCI., 58:1955–1964, 2018. © 2017 Society of Plastics Engineers

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“…9,23,27 The PCL/PLA blend has been widely studied, showing great application potential in the areas of packaging and biomedicine, among others, being the most popular and largely researched biodegradable polymer. 13,17,[28][29][30][31][32] The combination of PLA with PCL has shown an improvement in mechanical strength and processability when compared to the pure PCL and an increase in toughness and ductility when compared to the PLA. 21,[29][30][31][32] Furthermore, such properties of PCL/PLA blends can be further enhanced with the addition of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Effects of processing conditions on hybrid filler selective localization, rheological, and thermal properties of poly(ε‐caprolactone)/poly(lactic acid) blends

Decol

Pachekoski

Segundo

et al. 2019

J of Applied Polymer Sci

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In this study, the effects of processing conditions through different mixing sequences were used to analyze the factors, which could influence the hybrid filler selective localization in an immiscible polymer blend and how localization can influence the rheological and thermal properties. Different selective localizations were observed depending on the mixing sequence used when the hybrid filler was added. Notably, nanoparticles can interact with each other, which favor a synergy between them and alters, besides the localization, the dispersion state, or can interact with one polymer phase, and also alter the nanoparticles' selective localization. An improvement in rheological properties was observed in the hybrid nanocomposite in which there was interaction between the nanoparticles, favoring the hexagonal boron nitride exfoliation. On the other hand, for the storage modulus and degree of crystallinity, the sharpest increase occurred in the hybrid nanocomposite in which the nanoparticles could interact preferably with one polymer phase. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 137, 48711.

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Synergistic effects in mechanical properties of PLA/PCL blends with optimized composition, processing, and morphology

Abstract: Blending of poly(lactic acid) with poly(ε-caprolactone) can increase the impact strength above the values of the individual components.

Cited by 135 publications

References 47 publications

Biomimetic design of bone substitutes based on cuttlefish bone‐derived hydroxyapatite and biodegradable polymers

Biomimetic design of bone substitutes based on cuttlefish bone‐derived hydroxyapatite and biodegradable polymers

Strong synergistic improvement of mechanical properties in HDPE/COC blends with fibrillar morphology

Effects of processing conditions on hybrid filler selective localization, rheological, and thermal properties of poly(ε‐caprolactone)/poly(lactic acid) blends

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