Evaluating <scp>PE</scp>/<scp>PLA</scp> interfacial tension using ternary immiscible polymer blends

Gu, Lianzhi; Macosko, Christopher W.

doi:10.1002/app.50623

Cited by 11 publications

(8 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, extensive efforts have been made to the toughening of PLA. For example, petroleum-based derivatives such as polyethylene or chain extenders − were compounded with PLA for the purpose of reducing the brittleness. However, the addition of these non-degradable toughing agents inevitably deteriorates the degradability of PLA.…”

Section: Introductionmentioning

confidence: 99%

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

et al. 2023

View full text Add to dashboard Cite

The development of low-cost and high-performance bio-based composites derived from forestry waste lignin and polylactic acid has emerged as a topic of central attention. However, the weak compatibility between lignin and polylactic acid often resulted in high brittleness of the composites. Graft copolymerization is not only the most effective way to modify lignin but also can significantly improve the compatibility of lignin and polylactic acid. In this study, bio-based monomer lauryl methacrylate was grafted onto lignin by feasible radical polymerization to prepare lignin graft copolymers with excellent thermal stability and hydrophobicity, which are expected to improve the compatibility with polylactic acid. Wholly bio-based composites were prepared by compounding this graft copolymer with polylactic acid. The results showed that the crystallization ability of the composite was improved, and the highest crystallinity was increased from 6.42% to 17.46%. With addition of LG-g-PLMA lower than 9%, the thermal stability of the composites was slightly improved. At 5% copolymer addition, the elongation at break and tensile toughness of the composites increased by 42% and 36%, respectively. Observation of the frozen fracture surface of the composite by SEM found that wire drawing and ductile deformation appeared when a small amount of LG-g-PLMA was added. The thus prepared composites also showed excellent UV barrier properties. This approach provides a new idea for the high-value application of lignin.

show abstract

Section: Introductionmentioning

confidence: 99%

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

et al. 2023

View full text Add to dashboard Cite

show abstract

“…In multiphase polymer blends, the morphology of ternary blends can be predicted by understanding the interfacial tension between the blend components. [ 44,45 ] To investigate the interfacial tension of different component in PLA/PBAT/MAM ternary blends, two liquids, water and ethylene glycol, were selected to test the contact angle of neat PLA, PBAT, and MAM at room temperature. The values of interfacial tension for

γ_{12}

γ_{23}

, and

γ_{13}

(polymer 1 was PBAT, polymer 2 was PLA, and polymer 3 was MAM) were estimated using the harmonic mean equation [ 46 ] :

γ_{12} goodbreak= γ_{1} goodbreak+ γ_{2} - 4 goodbreak\times ((), \frac{γ_{1}^{d} \times γ_{2}^{d}}{γ_{1}^{d} + γ_{2}^{d}} goodbreak+ \frac{γ_{1}^{p} \times γ_{2}^{p}}{γ_{1}^{p} + γ_{2}^{p}})

The results are shown in Table 3.…”

Section: Resultsmentioning

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

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

“…Gu et al demonstrated that experimental value of PLA/PE interfacial tension is at least 9 mN/m at the temperature of 180°C. [ 55 ] In case of PLA/PHB films surface tension was about 3 mN/m indicating higher compatibility of polymers and lower stability of layered structure in such films. However, for these films sufficient fluctuation of surface tension was observed that lead to rather high margin of error in calculation.…”

Section: Resultsmentioning

confidence: 99%

Influence of polymer compatibility and layer thickness on the structural and thermophysical properties of polymer multilayer films

Melnikova

Larin²

2022

Journal of Polymer Science

View full text Add to dashboard Cite

Coextruded multilayer polymer films are promising packaging materials since their architecture and properties can be adjusted while the production technology is environmentally friendly. Here, the effect of layers thickness and polymers compatibility in alternating layers on the structure and thermophysical properties of such films was studied by means of molecular dynamics simulations. The results show that the model films with layers of incompatible polymers polylactide (PLA) and polyethylene (PE) are stable in time and have very low interfacial diffusion depth even when the layers thickness is about several nanometers. Systems with incompatible polymers differ from the systems with compatible ones by the presence of anisotropy in the mobility of polymer atoms. These films also have two glass transition temperatures. Multilayer films based on compatible for the selected chain lengths polymers PLA and poly(3‐hydroxybutyrate) (PHB) as well as one‐component systems with PLA layers have a single glass transition point. In these films interfacial diffusion depth tends to gradually increase during the simulation. However, even for one‐component system with layers thickness of 7.5 nm sufficiently stable structure of the film is formed, while heterogeneous films with PLA and PHB layers reach metastable state during the modeling with almost constant interfacial diffusion depth.

show abstract

Evaluating PE/PLA interfacial tension using ternary immiscible polymer blends

Cited by 11 publications

References 33 publications

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

Grafting Polymerization of Long-Chain Hydrophobic Acrylic Monomer onto Lignin and Its Application in Poly(Lactic Acid)-Based Wholly Green UV Barrier Composite Films

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

Influence of polymer compatibility and layer thickness on the structural and thermophysical properties of polymer multilayer films

Contact Info

Product

Resources

About