Role of stereocomplex in advancing mass transport and thermomechanical properties of polylactide

Chen, Qi; Auras, Rafael; Ünalan, İlke Uysal

doi:10.1039/d1gc04520b

Cited by 20 publications

(10 citation statements)

References 154 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tacticity can alter polymer melting (Tm) and glass transition (Tg) temperatures [35]. The atactic PLA is amorphous, and both the isotactic PLLA and PDLA are highly crystalline giving the polymer higher tensile strength and higher modulus [56].…”

Section: Chemical Modification Of Plamentioning

confidence: 99%

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Meng¹,

Wang²,

Xiao³

et al. 2023

Sustainable Polymer &Amp; Energy

View full text Add to dashboard Cite

The acquisition of high-performance biodegradable plastics is of great significance in addressing the problem of environmental pollution of plastics. Polylactide (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) are the most promising biodegradable polymers and have excellent functional properties. However, low elongation at break and impact strength of PLA and low tensile modulus and flexural strength of PBAT hinder their application. A large number of studies focus on improving the performance of PLA and PBAT and broadening their applications. In terms of polymer modification, this paper summarized recent progresses in both chemical and physical modification methods for PLA and PBAT, respectively. The properties of PLA can be improved by co-polymerization, grafting, cross-linking and blending. The properties of PBAT can be improved mainly through blending with other degradable polymers, natural macromolecules and inorganic materials. This review can provide the reference and ideas for the modification of biomass-based biodegradable plastics like PLA and fossil-based biodegradable plastics like PBAT.

show abstract

Section: Chemical Modification Of Plamentioning

confidence: 99%

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Meng¹,

Wang²,

Xiao³

et al. 2023

Sustainable Polymer &Amp; Energy

View full text Add to dashboard Cite

show abstract

“…9 Stereocomplex crystals (SCs) can be generally obtained through careful crystallization by mixing PLLA and PDLA in a 1:1 molar ratio. Compared with the homogeneous crystals (HCs) of PLLA and PDLA, the polymer chains of the SCs are more tightly packed in the crystal lattice due to the unique intermolecular hydrogen bonds, 10,11 which leads to the excellent properties of the SCs such as high melting temperature, 12 good heat resistance, 13,14 mechanical properties, 15 and solvent resistance. 16,17 However, conventional methods such as solution casting and melt quenching often result in a mixture of HCs and SCs due to the compete for crystallization between these two crystals.…”

Section: Introductionmentioning

confidence: 99%

Effect of electrospun stereocomplex PLA fibers and modified cellulose nanocrystals on crystallization of poly(L‐lactic acid)

Wan

Zhuang

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

Poly(L-lactic acid) (PLLA) is a biodegradable polymer that has attracted increasing attention due to its fantastic properties. Nevertheless, the disadvantages of PLLA, such as low crystallization rate and brittleness, limit its wide commercial applications. In the present work, electrospun stereocomplex PLA fibers (Sc-fibers) and PLLA grafted cellulose nanocrystals (g-CNCs) are prepared as nano-fillers and then blended with PLLA matrix to prepare different nanocomposites. Both of nano-fillers would accelerate the crystallization rate of PLLA, and as expected, g-CNCs have much stronger nucleation ability towards PLLA than Sc-fibers. Nevertheless, the crystallization of PLLA will decrease to some extent in the presence of both nano-fillers of g-CNCs and Scfibers due to the preferential formation of stereocomplex crystals on the surfaces of CNCs. Moreover, the presence of nano-fillers would enhance the mechanical properties of PLLA, such as the elongation at break can increase by four times after incorporating both g-CNCs and Sc-fibers. This work provides a new consideration for designing different nano-fillers, especially for polymer matrices with low crystallization ability and brittleness.

show abstract

“…As a kind of bio-based commercial thermoplastic polymer material, polylactic acid (PLA) has been applied in the packaging industry due to its superior transparency and mechanical properties . However, its brittleness and flammability limit its further application in automotive, electronic, and electrical industries. , Therefore, it is urgent to develop a green flame retardant that can improve the mechanical properties of PLA simultaneously.…”

Section: Introductionmentioning

confidence: 99%

“…4 However, its brittleness 5 and flammability limit its further application in automotive, electronic, and electrical industries. 6,7 Therefore, it is urgent to develop a green flame retardant that can improve the mechanical properties of PLA simultaneously.…”

Section: ■ Introductionmentioning

confidence: 99%

Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

Liu

Yao

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Incorporating bio-based flame retardants into polylactic acid (PLA) for improving its fire retarding performance has always been attractive to researchers worldwide, while the synthesis of bio-based flame retardants always involves organic solvents. The drawbacks of bio-based flame retardants are also nonignorable, such as strong hydrophilicity, aggregation, and deterioration of the mechanical properties of PLA. Here, the biobased flame retardant APP@CS@Si was assembled in the water phase with ammonium polyphosphates (APP) and chitosan (CS) and carboxylated silicone oil (Si-COOH/Si). The results showed that the Si-COOH shell not only decreased the hydrophilicity of the flame retardant but also had superior fire retardancy due to its improved char formation ability. Only 2 wt % APP@CS@Si can endow PLA with satisfying flame retardancy such as the UL-94 V-0 grade. Higher values of the fire propagation index (0.150) and flame retardancy index (1.33) were also achieved by PLA with 4 wt % APP@CS@Si compared with those of PLA with the same loading of APP@CS. Interestingly, the total smoke release amount (TSR) of PLA/4APP@CS@Si was 60% lower than that of PLA/ 4APP@CS, exhibiting its excellent smoke suppression ability. Moreover, Si-COOH could also be deemed as a soft shell to improve the toughness of PLA with increased impact strength and elongation at break of the PLA composite by 20 and 16%, respectively.

show abstract

Role of stereocomplex in advancing mass transport and thermomechanical properties of polylactide

Abstract: Stereocomplex polylactide with physical crosslinking crystallites, empowering polylactide based materials with advanced performances and opening new opportunities for applications.

Cited by 20 publications

References 154 publications

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Recent Progress in Modification and Preparations of the Promising Biodegradable Plastics: Polylactide and Poly(butylene adipate-co-terephthalate)

Effect of electrospun stereocomplex PLA fibers and modified cellulose nanocrystals on crystallization of poly(L‐lactic acid)

Aqueous Self-Assembly of Bio-Based Flame Retardants for Fire-Retardant, Smoke-Suppressive, and Toughened Polylactic Acid

Contact Info

Product

Resources

About