Improved Rheology, Crystallization, and Mechanical Performance of PLA/mPCL Blends Prepared by Electron-Induced Reactive Processing

Huang, Ying; Müller, M.; Boldt, Regine; Zschech, Carsten; Gohs, Uwe; Wießner, Sven

doi:10.1021/acssuschemeng.0c07714

Cited by 26 publications

(27 citation statements)

References 41 publications

(53 reference statements)

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“…It was demonstrated that the incorporation of ionic groups in high molecular weight PLA makes it more amenable to processing applications. Huang et al 194 improved the rheological and mechanical properties by electron-induced reactive processing (EIReP) for improving interfacial energy between immiscible polymer phases without using any compatibilizers. It was observed that the chemical free approach increased the elasticity and melt strength of PLA blends.…”

Section: Processabilitymentioning

confidence: 99%

Durable Polylactic Acid (PLA)-Based Sustainable Engineered Blends and Biocomposites: Recent Developments, Challenges, and Opportunities

2021

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The paper comprehensively reviews durable polylactic acid (PLA)-based engineered blends and biocomposites supporting a low carbon economy. The traditional fossil fuel derived nonrenewable durable plastics that cannot be circumvented have spawned increased environmental concerns because of the continuous rise of their carbon footprint during processing and disposal. It is anticipated that the production of biodegradable and nonbiodegradable (durable) plastics from the year 2020 to 2025 will rise ∼47% and ∼21%, respectively. The carbon footprint can be reduced in durable (nonrenewable) plastics by decreasing or replacing the “fossil carbon” content with “renewable carbon” content. The replacement will enable us to attain a sustainable environment, a low carbon footprint, energy security, and effective resource management. Thus, PLA-based durable products need to be developed with an enhanced service life that strikes a balance between environment-friendliness and product performance for engineering high-performance applications. The recent progress for enhancing the durability of PLA-based products consisting of hybrid nonrenewable and renewable carbon has been attained by incorporating synthetic plastics, synthetic fibers (glass and carbon), natural fibers, and other biofillers (biocarbon). Further, the effects of additives such as initiators, nucleating agents, chain extenders, compatibilizers, impact modifiers, and toughening agents to prepare such blends and composites have been discussed. This Review further critically examines the advances centering on processability, heat resistance, flame retardancy, strength, and toughness. In addition to that, current and prospective applications such as automotive, electronic, medical, textile, and housing of PLA-based products are discussed. However, the challenges for tailoring durable PLA-based products that still need to be addressed, such as improved processability, striking stiffness–toughness balance, enhanced heat resistance, and improved interfacial adhesion between the polymer–polymer, polymer–filler, and hybrid polymer–filler in respective polymer blends, composites, and hybrid composites, are summarized and analyzed in this Review. Hence, the opportunities for improvement to overcome the challenges lie ahead.

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Section: Processabilitymentioning

confidence: 99%

Durable Polylactic Acid (PLA)-Based Sustainable Engineered Blends and Biocomposites: Recent Developments, Challenges, and Opportunities

2021

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“…The blending of PLA with nanofillers was found a most investigated method with excellent results and processability in recent years. [52][53][54][55]…”

Section: Introductionmentioning

confidence: 99%

A review on polyhedral oligomeric silsesquioxanes as a new multipurpose nanohybrid additive for poly(lactic acid) and poly(lactic acid) hybrid composites

et al. 2022

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The production of petroleum‐based polymers in huge amounts is perilous for our ecosystem and oil reserves. The use of biodegradable polymers instead of synthetic polymers for various commodity, engineering, and biomedical applications remains the overriding concern of the researchers in last decades. Although poly(lactic acid) (PLA) is considered to be the most befitting substitute for conventional petroleum‐based products because of its superlative mechanical properties, material & processing cost, and non‐toxicity, they have some consequential limitations for various applications because of their slow rate of crystallization, low thermal stability, high brittleness, and low toughness. To overwhelm these deficiencies during the last two decades, researchers have developed various techniques to tailor the properties of PLA, that is, blending with other polymers or using additives such as nanofillers. Among all the nanofillers, for example, carbon nanotubes and organoclays, polyhedral oligomeric silsesquioxanes (POSS) was found the most promising nanofiller because of its organic and inorganic nanostructure and fine dispersion into PLA matrix. This article reviews all the investigations relevant to POSS incorporation into PLA or blends of PLA with other polymers to compare the mechanical, morphological, and physical properties of the ameliorated composites and the neat PLA.

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“…where ΔH m is the melt enthalpy observed from the corresponding heating process of DSC measurement, ΔH cc is the cold crystallization enthalpy, ΔH 0 f is the melting enthalpy of PLA with 100% crystallinity (93.6 J g À1 ), 19 w is the PLA mass ratio.…”

Section: Differential Scanning Calorimeter (Dsc)mentioning

confidence: 99%

Melt spinning of PLA/PCL blends modified with electron induced reactive processing

Huang

Brünig

Müller

et al. 2021

J of Applied Polymer Sci

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The effect of electron induced reactive processing (EIReP) on the properties of biodegradable polylactide/masticated polycaprolactone (PLA/PCL) blends was firstly investigated without introducing any chemical additives. Subsequently, the melt spinnability of EIReP modified PLA/PCL blends was explored by a piston spinning. The EIReP modified PLA/PCL blends showed improved melt strength and elastic behavior. This is due to the formation of long chain branches and the enhanced chain entanglements. The crystallinity of PLA phase increased from 2.4% to 35.7% as the applied dose increased from 0 to 50 kGy. The PLA/PCL blends treated with 12.5 kGy demonstrated 2.4-fold of impact toughness than that of neat PLA, suggesting a superior interfacial adhesion and chain interactions between two phases. The crystallinity of the PLA/PCL fibers decreased from 33.3% to 17.8% as the applied dose increased from 12.5 kGy to 50 kGy. It is resulted from the hindered chain mobility of branched/grafted structures during fiber formation. The fracture strain of the fibers using a non-irradiated blend was 232.9% which increased to 311.5% for the 50 kGy irradiated blends. However, the fibers spun from irradiated blends demonstrated similar initial modulus but reduced tenacity compared to fibers spun from non-irradiated blend material.

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Improved Rheology, Crystallization, and Mechanical Performance of PLA/mPCL Blends Prepared by Electron-Induced Reactive Processing

Cited by 26 publications

References 41 publications

Durable Polylactic Acid (PLA)-Based Sustainable Engineered Blends and Biocomposites: Recent Developments, Challenges, and Opportunities

Durable Polylactic Acid (PLA)-Based Sustainable Engineered Blends and Biocomposites: Recent Developments, Challenges, and Opportunities

A review on polyhedral oligomeric silsesquioxanes as a new multipurpose nanohybrid additive for poly(lactic acid) and poly(lactic acid) hybrid composites

Melt spinning of PLA/PCL blends modified with electron induced reactive processing

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