Recent advances on reactive extrusion of Poly(lactic acid)

Augé, Marie-Odile; Roncucci, Daniele; Bourbigot, Serge; Bonnet, Fanny; Gaan, Sabyasachi; Fontaine, Gaëlle

doi:10.1016/j.eurpolymj.2022.111727

Cited by 18 publications

(7 citation statements)

References 112 publications

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“…To obtain copolymers of PLA with other copolymers, two main approaches are widely used: directional polymerization with the production of copolymers of a given composition and structure and graft-copolymerization by reactive mixing (as a rule, extrusion) in a melt in the presence of an initiator and/or catalyst. Reactive extrusion is a fast and cost-effective method commonly used for the functionalization of PLA or ring-opening polymerization (ROP) of lactide (for example, [ 21 , 22 ]).…”

Section: Copolymerization With Flexible Polymersmentioning

confidence: 99%

Recent Approaches to the Plasticization of Poly(lactic Acid) (PLA) (A Review)

Mastalygina,

Aleksanyan

2023

Polymers

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Poly(lactic acid) (PLA) is a polyester attracting growing interest every year in different application fields, such as packaging, cosmetics, food, medicine, etc. Despite its significant advantages, it has low elasticity that may hinder further development and a corresponding rise in volume of consumption. This review opens a discussion of basic approaches to PLA plasticization. These considerations include copolymerization and blending with flexible polymers, introducing oligomers and low-molecular additives, as well as structural modification. It was demonstrated that each approach has its advantages, such as simplicity and low cost, but with disadvantages, including complex processing and the need for additional reagents. According to the analysis of different approaches, it was concluded that the optimal option is the application of copolymers as the additives obtained via reactive mixing to PLA and its blends with other polymers.

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Section: Copolymerization With Flexible Polymersmentioning

confidence: 99%

Recent Approaches to the Plasticization of Poly(lactic Acid) (PLA) (A Review)

Mastalygina,

Aleksanyan

2023

Polymers

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Section: Introductionmentioning

confidence: 99%

“…Reactive compatibilization is known as an effective method to reduce the interfacial tension and restrict the phase separation in immiscible polymer blends, including the PLA/PBS blends. [24][25][26][27][28][29][30][31] In the blending process, coupling, branching or grafting reaction occurs at the interface between reactive compatibilizers and both blend components. 22,31 Various reactive compatibilizers were reported for the compatibilization of the PLA/PBS blends, such as dicumyl peroxide (DCP), 24 benzoyl peroxide (BPO), 25 lysine triisocyanate (LTI), 26 lysine diisocyanate (LDI), 26 toluene diisocyanate (TDI), 27 multifunctional epoxy oligomer (ADR 4370S), 31 and ethylene-methyl acrylate-glycidyl methacrylate.…”

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confidence: 99%

Superior heat‐resistant polylactide/poly(butylene succinate) blend fibers via in‐situ reactive compatibilization

Huang,

Zhang,

Zhou

et al. 2024

Polymers for Advanced Techs

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Blending poly(butylene succinate) (PBS) with polylactide (PLLA) has proven effective in improving heat resistance of PLLA fibers. Unfortunately, it remains challenging to maintain good spinnability for PLLA/PBS blends with high content of PBS with which further improved heat resistance could be anticipated. In this study, reactive melt‐extrusion was devised to in‐situ generate PLLA‐PBS copolymers by introducing zinc acetate as a transesterification catalyst into PLLA/PBS blends. The compatibility between the PLLA and PBS phases was greatly improved by the formation of PLLA‐PBS copolymers, resulting in excellent melt‐spinnability even for the PLLA/PBS blends with high PBS content up to 20 wt%. In addition, an increase in crystallinity of PLLA was achieved in PLLA/PBS blend fibers, thanks to the enhanced compatibility. More importantly, the presence of PBS nuclei retarded the molecular orientation of the amorphous PLLA phase, consistent with the effective results from the relaxation heat‐setting treatment. These led to an exceptionally improved heat resistance of the PLLA/PBS blend fibers. As an encouraging result, the boiling water shrinkage was significantly reduced from ca. 20% for neat PLLA fibers to 3.7% for the PLLA/PBS blend fibers with 20 wt% PBS content. These findings may open up a facile and effective route to develop PLLA/PBS blend fibers showing sound spinnability, greatly improved heat resistance and softness.

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“…These green polymers, which range from small molecules to polymer materials to biomass, under appropriate active conditions after their intended use, represent one possible end-of-life solution. , As concerns about the environmental and biosafety impact of used polymers increase, there is sustained interest in the lifecycle of polymeric materials. A series of aliphatic polyesters, including poly(lactic acid) (PLA), − poly(glycolic acid), − poly(caprolactone), and polyhydroxybutyrate, − have been successfully developed as sustainable and degradable polymers. The introduction of an aromatic ring pendant into the backbone through the ring-opening polymerization (ROP) of mandelide , has produced a polyester as an alternative to nondegradable polystyrene.…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Aromatic Polyesters with High Molecular Weights via Lewis Pair-Mediated Ring-Opening Polymerization of Salicylic Acid-Derived O-Carboxyanhydrides

Liang,

Meng,

Yang

2023

Macromolecules

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Compared to fossil resources, which display limited degradability, exploring novel green polyesters as more sustainable alternatives is an extremely challenging task. In this study, we have developed an effective pathway from natural origin salicylic acid (SA) to poly(salicylic acid) (PSA) with high molecular weight. This was achieved by employing Lewis pair-mediated ring-opening polymerization of salicylic acid O-carboxyanhydrides (SAOCA). We identified two metal-free combinations, namely, 1,3-bis(2,6-diisopropylphenyl)imidazole (NHC-1)/N-[3,5-bis(trifluoromethyl)phenyl]-N′-cyclohexyl thiourea (TU-1) and 2-tertbutylimino-2-diethylamino-1,3-dimethyl-perhydro-1,3,2 diazaphosphorine (BEMP)/TU-1, that mediated ROP of SAOCA at room temperature within 100 min and successfully produced PSA with molecular weight greater than 150 kDa. We observed that the phase state of the polymerization solution switched from clarification to turbidity to phase separation when the PSA chain was growing up. Based on the NMR results of the interaction between organic base and TU-1, the analysis of polymerization kinetics, and DFT calculations, we found that the excess addition of TU-1 could effectively restrain unfavorable results in which very fast propagation of the polymerization chain caused phase separation in a short time. Furthermore, it improved the controllability of ROP reactions and the resulting chain length of PSA. The generality of this synthetic strategy was evaluated by the convenient preparation of other PSA-series polyesters via the ROP of SAOCA analogues varying the substituents. The obtained PSA-series polyesters exhibited good thermal stability and high glass transition temperature, outperforming some commodity polyolefins. This synthetic method paves the way for a better understanding of PSA-based polyesters as a class of future green materials applicable in the field of biomedicine and sustainable plastic packaging.

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Recent advances on reactive extrusion of Poly(lactic acid)

Cited by 18 publications

References 112 publications

Recent Approaches to the Plasticization of Poly(lactic Acid) (PLA) (A Review)

Recent Approaches to the Plasticization of Poly(lactic Acid) (PLA) (A Review)

Superior heat‐resistant polylactide/poly(butylene succinate) blend fibers via in‐situ reactive compatibilization

Facile Synthesis of Aromatic Polyesters with High Molecular Weights via Lewis Pair-Mediated Ring-Opening Polymerization of Salicylic Acid-Derived O-Carboxyanhydrides

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