Morphological structure, thermal and mechanical properties of tough poly(lactic acid) upon stereocomplexes

Qi, Fei; Tang, Mengqi; Chen, Xiaolang; Chen, Man; Guo, Gang; Zhang, Zhibin

doi:10.1016/j.eurpolymj.2015.08.008

Cited by 35 publications

(17 citation statements)

References 52 publications

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“…However, different drawbacks such as its brittleness, low thermal stability and slow crystallization rate have limited PLA applications until now . It is noteworthy that reducing the brittleness and improving the toughness of PLA is a major research interest and many studies have been done . In this regard, the blending of PLA with elastomers is introduced as one of the most effective, practical and economical methods to obtain toughened PLA products.…”

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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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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“…Moreover, with the increasing content of PE‐ g ‐GMA, the spherocrystal number of various PBS samples [Figures (2b–2e)] increased gradually and largely under the same crystallization time of 2 min, especially for the PBS/PE‐ g ‐GMA 10 sample. This should be attributed to the heterogeneous nucleation effect of branching points and the formed PE crystalline region in PBS/PE‐ g ‐GMA samples …”

Section: Resultsmentioning

confidence: 99%

“…The reason for this phenomenon could be explained by the formation of branching and micro crosslinking structures in the four PBS/PE‐ g ‐GMA samples, which would prevent the chain segments to move into the crystal lattice and limit the growth of spherocrystals in PBS . The generation of abundant but tiny spherocrystals was beneficial to increase the cell nucleation density of PBS during foaming process …”

Section: Resultsmentioning

confidence: 99%

Simple and feasible strategy to fabricate microcellular poly(butylene succinate) foams by chain extension and isothermal crystallization induction

Yin

Zhou

et al. 2019

J of Applied Polymer Sci

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In this article, a facile and efficient isothermal crystallization induction method was proposed to fabricate microcellular poly(butylene succinate) (PBS) foams with supercritical CO2. The good regularity of PE chain segments and high reactive epoxy groups in ethylene‐glycidyl methacrylate copolymer (PE‐g‐GMA) serving as a chain extender were employed to improve the crystallization behaviors, viscoelasticity, and foaming behaviors of PBS through chain extension reaction. The effect of PE‐g‐GMA content on the thermal properties, rheological performances, and cellular morphology of various PBS samples was investigated systematically. When the PE‐g‐GMA content switched from 7.5 to 10 wt %, an interesting transition from fine cells to microcells was observed in PBS/PE‐g‐GMA foams. Microcellular PBS foam modified by 10 wt % PE‐g‐GMA was successfully prepared at the foaming temperature of 87 °C and the induction time of 7 min, in which its cell size and cell density could reach 6.63 ± 1.93 μm and 3.75 × 109 cells cm−3, respectively. The formation of abundant but tiny spherocrystals in chain extended PBS samples made a considerable contribution for preparing microcellular PBS foams. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48850.

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“…The most stable α‐structure melts at 185°C and the β structure at 175°C. The optical purity of PLA substantially affects the mechanical properties . PLA polymers having l‐ isomer are ∼90% crystalline; those with lesser optical purity are amorphous.…”

Section: Introductionmentioning

confidence: 99%

Poly(lactic acid)‐based nanocomposites

Basu

Nazarkovsky

Ghadi

et al. 2016

Polymers for Advanced Techs

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Classic plastics accumulate in nature causing environmental pollution, yet as a counterbalance they benefit society in many ways. They are versatile, cost‐effective, and can be tailored to have desired properties. The global environment has led to the fabrication of commodity plastics from environmentally degradable polymers. Poly(lactic acid) (PLA) is the most promising among the environmentally friendly polymers available. PLA‐based plastics have mechanical, thermal, and transparency similar to traditional plastics, and they can be molded and fabricated using the same equipment and procedures. Their material properties are enhanced through nanocomposites, compatibilizers, plasticizers, and other fillers (flame retardant, ultraviolet filter, etc.). This review summarizes mass production techniques and property reinforcements (focusing on nanocomposites and plasticizers) for PLA‐based plastics for commodity use. Copyright © 2016 John Wiley & Sons, Ltd.

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Morphological structure, thermal and mechanical properties of tough poly(lactic acid) upon stereocomplexes

Cited by 35 publications

References 52 publications

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

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

Simple and feasible strategy to fabricate microcellular poly(butylene succinate) foams by chain extension and isothermal crystallization induction

Poly(lactic acid)‐based nanocomposites

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