Highly toughened poly(ʟ-lactide) by poly(ᴅ-lactide)-containing crosslinked polyurethane shows excellent malleability, flexibility and shape memory property

Dai, Suyang; Dai, Ziming; Jiang, Ni; Ning, Zhenbo; Gan, Zhihua

doi:10.1016/j.polymer.2022.125482

Cited by 4 publications

(1 citation statement)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Poly(lactic acid) (PLA) can be derived from green resources such as wheat, sugarcane, and corn through biofermentation. , It is currently one of the most desirable bio-based polymers due to its favorable mechanical performance, biocompatibility, biodegradability, and low production cost. , The market value of PLA is projected to reach approximately 1.82 billion U.S. dollars in 2028, approximately 3.5 times its market value in 2020 . However, the limited toughness, slow crystallization rate, and poor heat resistance of PLA significantly restrict its application. − Similarly, PCL is broadly applied in packaging and biomedical fields due to its flexibility, processing properties, biocompatibility, and biodegradability. , …”

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Polyurethane Reactive Hot-Melt Adhesive Derived from Poly(ε-caprolactone-co-lactic acid) Diols

Wang,

Yuan,

Pan

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

Due to the exhaustion of fossil resources and the degradation of the environment, there is an increasing utilization of eco-friendly materials as substitutes for petroleum-derived materials. In this work, a series of poly(ε-caprolactone-co-lactic acid) diols were synthesized via one-pot ring-opening polymerization with different lactic acid (LA)/ε-caprolactone (CL) feed ratios. Subsequently, the eco-friendly diols were mixed with polyether diol, 4,4′-diphenylmethane diisocyanate (MDI), and other additives to produce polyurethane reactive hot-melt adhesives (PURHAs). The enhancement of LA/CL feed ratios correspondingly led to an increase in the glass transition temperature (T g) of the eco-friendly polyester diols. The differential scanning calorimetry (DSC) data demonstrated that PCL-diol had the highest crystallinity, and the polarizing optical microscopy (POM) observations revealed the smallest spherulite size in PCLA28-diol. Thermogravimetric analysis (TGA) results indicated that the 5 wt % loss temperature (T5) of PURHAs surpassed 265 °C. Tensile testing showed that the elongation at break of PURHAs containing PCL segments increased by at least eight times compared to PURHA without PCL segments. Lap-shear testing illustrated that a PURHA with a higher LA/CL ratio exhibits higher green strength. In addition, PUHRA-PCLA28 derived from PCLA28-diol and PUHRA-PCL derived from PCL-diol possessed better tensile and lap-shear strengths. Notably, the lap-shear strengths of PUHRA-PCLA28 and PUHRA-PCL on a PC substrate reached impressive values of 8.85 and 8.05 MPa, respectively. These bio-based PURHAs synthesized from eco-friendly polyester diols with different LA/CL ratios show potential applications in electronic appliances, the automotive industry, and construction materials.

show abstract

Section: Introductionmentioning

confidence: 99%

Eco-Friendly Polyurethane Reactive Hot-Melt Adhesive Derived from Poly(ε-caprolactone-co-lactic acid) Diols

Wang,

Yuan,

Pan

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

show abstract

Simultaneous improvement of tensile strength and toughness of polylactic acid by incorporating a biodegradable core‐shell nanofiller with double polymer layers

Gao,

Peng,

Deng

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

While blending with flexible polymers has been a commonly employed strategy to enhance the toughness of polylactic acid (PLA), it's still a great challenge to avoid the sacrifice of tensile strength at the same time. In this work, we demonstrate a promising route to simultaneously improve the strength and toughness of PLA by compounding PLA with poly(ε‐caprolactone) (PCL) and PLA grafted multi‐walled carbon nanotubes core‐shell nanofiller (MWNT‐PCLPLA) via a two‐step ring‐opening polymerization and have analyzed the strengthening and toughening mechanism through molecular dynamics simulation. The double polymer layers of MWNT‐PCLPLA effectively improve the interfacial interaction between MWNTs and the matrix, in which the outer PLA layer has the same molecular structure with the matrix and facilitates stress transfer, while the flexible PCL layer can absorb energy through self‐deformation and induce local plastic deformation of the matrix. When the content of MWNTs was only 1 wt%, the strength and elongation at break of PLA/MWNT‐PCLPLA nanocomposites were increased by 47.92% and 690.11% compared to neat PLA. Furthermore, the toughness of nanocomposites reached 11.93 MJ/m3, which is about 16 times that of neat PLA. This novel core‐shell nanofiller with double polymer layers is expected to be further applied in other polymer systems.Highlights A core‐shell nanofiller with double polymer layers was synthesized. Improved dispersion and interfacial compatibility of nanofillers in matrix. The crystallization ability of PLA was improved by functionalized MWNTs. Simultaneously improved strength and toughness of PLA/MWNT‐PCLPLA nanocomposite.

show abstract

A new strategy for reconfigurable actuators based on oxidation of fast responsive shape memory polyarylene sulfide sulfone

Yan,

Zhang,

Yang

et al. 2024

Polymer

View full text Add to dashboard Cite

Highly toughened poly(ʟ-lactide) by poly(ᴅ-lactide)-containing crosslinked polyurethane shows excellent malleability, flexibility and shape memory property

Cited by 4 publications

References 28 publications

Eco-Friendly Polyurethane Reactive Hot-Melt Adhesive Derived from Poly(ε-caprolactone-co-lactic acid) Diols

Eco-Friendly Polyurethane Reactive Hot-Melt Adhesive Derived from Poly(ε-caprolactone-co-lactic acid) Diols

Simultaneous improvement of tensile strength and toughness of polylactic acid by incorporating a biodegradable core‐shell nanofiller with double polymer layers

A new strategy for reconfigurable actuators based on oxidation of fast responsive shape memory polyarylene sulfide sulfone

Contact Info

Product

Resources

About