Composition dependence of the synergistic effect of nucleating agent and plasticizer in poly(lactic acid): A Mixture Design study

Fehri, Mohammad Kazem; Mugoni, Consuelo; Cinelli, Patrizia; Anguillesi, Irene; Coltelli, Maria Beatrice; Fiori, Stefano; Montorsi, Monia; Lazzeri, Andrea

doi:10.3144/expresspolymlett.2016.26

Cited by 29 publications

(26 citation statements)

References 42 publications

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“…By fitting, the spherulite growth rates of PLA0 and PLA3 were 3.04 and 1.21 μm/min, respectively. This was due to the even distribution of the nucleating agent and the impingement of large number of tiny crystals with each other, which greatly limited the growth of spherulites . To sum up, the total crystallization rate of PLA3 was much larger than that of pure PLA, and the addition of LDH‐PMMA resulted in reduction of the spherulite size of PLA.…”

Section: Resultsmentioning

confidence: 99%

“…This was due to the even distribution of the nucleating agent and the impingement of large number of tiny crystals with each other, which greatly limited the growth of spherulites. 48,49 To sum up, the total crystallization rate of PLA3 was much larger than that of pure PLA, and the addition of LDH-PMMA resulted in reduction of the spherulite size of PLA. Polarized optical microscopy analysis further confirmed that LDH-PMMA played a pivotal role in the crystallization process, which was in accordance with the aforementioned DSC results.…”

Section: Polarized Optical Microscopic Analysismentioning

confidence: 99%

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Synthesis, characterization of layered double hydroxide‐poly(methylmethacrylate) graft copolymers via activators regenerated by electron transfer for atom transfer radical polymerization and its effect on the performance of poly(lactic acid)

Geng

Zhen

Song

et al. 2018

Polymers for Advanced Techs

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Layered double hydroxide‐poly(methylmethacrylate) (LDH‐PMMA) graft copolymers were prepared via activators regenerated by electron transfer for atom transfer radical polymerization. The results showed that the hydrophobicity of LDH‐PMMA was improved by the incorporation of hydrophilic groups. Moreover, poly(lactic acid) (PLA)/LDH‐PMMA nanocomposites were prepared by melt blending to enhance the performances of PLA. The crystallization and mechanical properties of the PLA/LDH‐PMMA nanocomposites were studied by differential scanning calorimetry, tensile testing, and polarized optical microscopy, respectively. Results of mechanical testing showed that the tensile strength, elongation at break, and impact strength of PLA/LDH‐PMMA nanocomposites were increased by 5.64%, 37.95%, and 49.70%, respectively, compared with PLA. The differential scanning calorimetry results indicated that LDH‐PMMA eliminated the cold crystallization of PLA matrix and improved the crystallinity of PLA by 37.26%. The polarized optical microscopy of PLA/LDH‐PMMA nanocomposites demonstrated that LDH‐PMMA increased the crystallization rate of PLA. It was also found that the rheological behaviors of the PLA nanocomposites were significantly enhanced. Based on these results, a new choice for modified LDHs was provided and used as a nucleating agent to improve the properties of PLA.

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Section: Resultsmentioning

confidence: 99%

Section: Polarized Optical Microscopic Analysismentioning

confidence: 99%

Synthesis, characterization of layered double hydroxide‐poly(methylmethacrylate) graft copolymers via activators regenerated by electron transfer for atom transfer radical polymerization and its effect on the performance of poly(lactic acid)

Geng

Zhen

Song

et al. 2018

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…Thus, the use of proper nucleating agents, allowing increasing the crystallization rate of PLA during the rapid cooling is particularly interesting on a technological point of view. Nucleated PLA results stabilized and its optical and mechanical properties are not modified as a consequence of heating in the temperature range of its glass transition [24][25][26]. PLA has four optical enantiomers: PLLA, PDLA, PDLLA (racemic), and meso-PLA.…”

Section: Poly(lactic Acid)mentioning

confidence: 99%

Cosmetic Packaging to Save the Environment: Future Perspectives

et al. 2019

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Consumer awareness about the damages that plastic packaging waste cause to the environment, coupled with bio-economy and circular economy policies, are pushing plastic packaging versus the use of bio-based and biodegradable materials. In this contest, even cosmetic packaging is looking for sustainable solutions, and research is focusing on modifying bio-based and biodegradable polymers to meet the challenging requirements for cosmetic preservation, while maintaining sustainability and biodegradability. Several bio-based and biodegradable polymers such as poly(lactic acid), polyhydroxyalkanoates, polysaccharides, etc., are available, and some first solutions for both rigid and flexible packaging are already present on the market, while many others are under study and optimization. A fruitful cooperation among researchers and industries will drive the cosmetic sector toward being more ecological and contributing to save our environment.

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“…strain gauge) if there is a significant gradient in stress values. There are modern non-destructive methods such as the Digital Image Correlation (DIC Method) [6].…”

Section: Figure1 Structures For Aircraftmentioning

confidence: 99%

Experimental and modeling stress concentration factor (SCF) of a tension poly lactic acid (PLA) plate with two circular holes

Mohan¹,

Habeeb²,

Abood³

2019

PEN

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The design of high performance aircraft structures frequently includes various shape and size discontinuities for various purposes. The zones near to these notches become critical regions under various working loading. The stress concentration factor (SCF) and tensile strength degradation of poly lactic acid (PLA) plates are addressed in the current study through a combination of experimental and numerical studies using finite element (FE) modeling techniques. The present work performs stress concentration factor (SCF) of rectangular plates with two symmetrical circular holes under uniaxial tension load of two various types (PLA, PLA/15%carbon), which were determined in the current work experimentally and numerically using finite element method with help of Ansys software. The results of experimental test showed decay in tensile modulus and tensile strength is less than that of using plates without holes by (10%, 22.1%) for (PLA, PLA/15%carbon) respectively, and the apparent stress concentration factor is (3.33, 3.61) respectively. And showed decay in tensile strength is less than that of using plates without holes by (28.35%, 27.77%) for (PLA, PLA/15%carbon) respectively, due to the concentration of stresses around the holes. A finite element analysis is carried out and the outcomes have been estimated with experimental results for checking the efficient use of this article. The numerical results show the Von Mises stress distribution and stress concentration factor is (2.16, 2.35) for (PLA, PLA/15%carbon) respectively.

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Composition dependence of the synergistic effect of nucleating agent and plasticizer in poly(lactic acid): A Mixture Design study

Cited by 29 publications

References 42 publications

Synthesis, characterization of layered double hydroxide‐poly(methylmethacrylate) graft copolymers via activators regenerated by electron transfer for atom transfer radical polymerization and its effect on the performance of poly(lactic acid)

Synthesis, characterization of layered double hydroxide‐poly(methylmethacrylate) graft copolymers via activators regenerated by electron transfer for atom transfer radical polymerization and its effect on the performance of poly(lactic acid)

Cosmetic Packaging to Save the Environment: Future Perspectives

Experimental and modeling stress concentration factor (SCF) of a tension poly lactic acid (PLA) plate with two circular holes

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