Highly toughened poly(lactic acid) blends prepared by reactive blending with a renewable poly(ether‐block‐amide) elastomer

Xia, Yiwei; Wang, Guangxin; Feng, Yang; Zhao, Guiyan; Jiang, Wei

doi:10.1002/app.50097

Cited by 11 publications

(11 citation statements)

References 40 publications

(63 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Impact strength is another key property for the potential application of polymers 26,27 . Figure 4 shows the relationship between PHBV's notched Izod impact strength and the annealing temperature.…”

Section: Resultsmentioning

confidence: 99%

Dramatic toughness improvement of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by supercritical carbon dioxide–assisted annealing

Chen

Mao²,

Zhang

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

Supercritical carbon dioxide (scCO2)–assisted annealing process has demonstrated promising prospects in the toughness enhancement of polymers. Herein, this effective method was adopted to toughen a biodegradable polymer, poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) (PHBV). Significantly, the greatly improved tensile toughness and impact toughness of PHBV were achieved. It is noted that the 26 times enhancement in tensile toughness and 2.4 times improvement in impact toughness were obtained for the sample treated at annealing temperature of 90°C and saturation pressure of 10 MPa. More importantly, the toughness mechanism was further explored via various characterizations. It is indicated that the increment in the toughness of PHBV after scCO2‐assisted annealing was closely related to the perfection of microstructure sample and the appearance of micro‐voids.

show abstract

Section: Resultsmentioning

confidence: 99%

Dramatic toughness improvement of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by supercritical carbon dioxide–assisted annealing

Chen

Mao²,

Zhang

et al. 2021

Polymers for Advanced Techs

View full text Add to dashboard Cite

show abstract

“…To date, various biobased or biodegradable elastomers have been adopted to improve the impact toughness of poly(lactic acid) (PLA), such as natural rubber (NR), − epoxidized NR, various flexible copolyesters, − sebacic acid-precured epoxidized soybean oil precursors (VESO), , and poly(ether- b -amide) thermoplastic elastomers (commercially known as Pebax). , However, in addition to a substantial loss in the strength and stiffness of PLA, these sustainable polymeric modifiers either have limited commercial availability, − involve a complicated premodification procedure, ,,, or need the assistance of an extra non-biobased additive. − , It is highly desirable to toughen PLA with in situ formed elastomers directly from readily available bioderived monomers.…”

Section: Introductionmentioning

confidence: 99%

Diisocyanate-Induced Dynamic Vulcanization of Difunctional Fatty Acids toward Mechanically Robust PLA Blends with Enhanced Luminescence Emission

et al. 2022

View full text Add to dashboard Cite

The toughening of poly(lactic acid) (PLA) often involves the use of nonbiodegradable or petrochemical elastomers owing to the lack of effective renewable alternatives and facile routes to tailor desirable morphologies. In this work, we developed a facile and universal dynamic vulcanization strategy of dual monomers to fabricate mechanically robust PLA blends. By increasing NCO/COOH equivalent ratios between L-lysine diisocyanate (LDI) and hydrogenated dimer acid (HDA) (i.e., n NCO,LDI /n COOH,HDA ) above 1.0:1, the phase structure of the resulting PLA blends transformed from the common "sea-island" morphology to partially or fully co-continuous ones. The extraordinary impact toughness (the maximum impact strength up to 109.8 kJ m −2 ) in combination with the balanced strength and stiffness was attributed to a continuous biopolyamide elastomer (HDAPA) with the simultaneous improvement in both the cross-linking level and interfacial compatibilization. Atomic force microscopy (AFM)-based nanomechanical mapping results suggested that the cross-linking of HDAPA domains gradually prevailed from the boundaries into the whole domains with the elevated n NCO,LDI /n COOH,HDA ratios. The mechanisms regarding multiple reactions and co-continuity development at an ultralow concentration of the minor HDAPA phase were elucidated. Intriguingly, the enhanced clustering-triggered emission was observed for the PLA/HDAPA blends with a fully co-continuous structure.

show abstract

“…Since the use of petroleum-based polymers partially compromises the biodegradability of PLA, increasing attention has been focused on the use of biodegradable polymers for PLA toughening. In recent years, biodegradable polymers such as poly(ether-block-amide), [22][23][24][25] biobased copolyesters, [26] poly(D-lactide)-b-polyurethane-b-poly (D-lactide), [27] polycaprolactone, [28,29] poly(butylene adipate-co-terephthalate) (PBAT), [30][31][32] and so forth were used to toughen PLA, among which, PBAT was commonly used to improve the toughness of PLA, especially the tensile toughness, widely used in the field of packaging.…”

Section: Introductionmentioning

confidence: 99%

Synergistic toughening of poly(lactic acid) by poly(butylene adipate‐co‐terephthalate) and poly(methyl methacrylate)–poly(butyl acrylate)–poly(methyl methacrylate) block copolymer

Zhang

Dong

Han

et al. 2022

Polymer Engineering & Sci

Self Cite

View full text Add to dashboard Cite

Poly(butyleneadipate-co-terephthalate) (PBAT) was used to toughen poly(lactic acid) (PLA) with the addition of poly(methyl methacrylate)-poly (butyl acrylate)-poly(methyl methacrylate) (MAM) through melt blending. The impact toughness and tensile toughness of the PLA/PBAT/MAM ternary blends were greatly enhanced when the MAM content was higher than 5%.For PLA/PBAT/MAM (80/15/5) blend, the notched impact strength was as high as 42.4 kJ/m 2 , and the elongation at break reached 194.7%. The structure-property relationship of the PLA/PBAT/MAM ternary blends were studied through scanning electron microscopy, dynamic mechanical analysis, and contact angle measurements. It is found MAM and PBAT have a synergistic toughening effect on PLA, the MAM acts as not only a compatibilizer but also a toughening agent, which can improve the compatibility and enhance the interfacial adhesion between PLA and PBAT. As a result, the overall mechanical properties of PLA blends were improved significantly. This result provides a simple to operate and more efficient method for PLA toughening.

show abstract

Highly toughened poly(lactic acid) blends prepared by reactive blending with a renewable poly(ether‐block‐amide) elastomer

Cited by 11 publications

References 40 publications

Dramatic toughness improvement of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by supercritical carbon dioxide–assisted annealing

Dramatic toughness improvement of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate) by supercritical carbon dioxide–assisted annealing

Diisocyanate-Induced Dynamic Vulcanization of Difunctional Fatty Acids toward Mechanically Robust PLA Blends with Enhanced Luminescence Emission

Synergistic toughening of poly(lactic acid) by poly(butylene adipate‐co‐terephthalate) and poly(methyl methacrylate)–poly(butyl acrylate)–poly(methyl methacrylate) block copolymer

Contact Info

Product

Resources

About