Blending poly(butylene succinate) with poly(lactic acid): Ductility and phase inversion effects

Deng, Yixin; Thomas, Noreen L.

doi:10.1016/j.eurpolymj.2015.08.029

Cited by 154 publications

(122 citation statements)

References 22 publications

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“…Further decrease in modulus was obtained with the addition of more PBS. These results are similar to the results obtained from PLA/PBS blends prepared by either melt spinning technique (Jompang et al 2013) or Haake RHeomix OS mixer (Deng & Thomas 2015). The elongation of pure PLA is really limited (8 %) and further improved by the blending with ductile PBS polymer, as shown in Fig.…”

Section: Mechanical Properties Of Pla/pbs Blendssupporting

confidence: 80%

Testing, characterization and modelling of mechanical behaviour of poly (lactic-acid) and poly (butylene succinate) blends

Qiu

Song

Zhao

2016

Mech Adv Mater Mod Process

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Background: Significant amount of research, both experimental and numerical, has been conducted to study the mechanical behaviour of biodegradable polymer PL(L)A due to its wide range of applications. However, mechanical brittleness or poor elongation of PL(L)A has limited its applications considerably, particularly in the biomedical field. This study aims to study the potential in improving the ductility of PLA by blending with PBS in varied weight ratios. Methods: The preparation of PLA and PBS blends, with various weight ratios, was achieved by melting and mixing technique at high temperature using HAAKE™ Rheomix OS Mixer. Differential Scanning Calorimetry (DSC) was applied to investigate the melting behaviour, crystallization and miscibility of the blends. Small dog-bone specimens, produced by compression moulding, were used to test mechanical properties under uniaxial tension. Moreover, an advanced viscoplastic model with nonlinear hardening variables was applied to simulate ratedependent plastic deformation of PLA/PBS blends, with model parameters calibrated simultaneously against the tensile test data. Results: Optical Microscopy showed that PBS composition aid with the crystallization of PLA. The elongation of PLA/PBS blends increased with the increase of PBS content, but with a compromise of tensile modulus and strength. An increase of strain rate led to enhanced stress response, demonstrating the time-dependent deformation nature of the material. Model simulations of time-dependent plastic deformation for PLA/PBS blends compared well with experimental results. Conclusions: The crystallinity of PLA/PBS blends increased with the addition of PBS content. The brittleness of pure PLA can be improved by blending with ductile PBS using mechanical mixing technique, but with a loss of stiffness and strength. The tensile tests at different strain rates confirmed the time-dependent plastic deformation nature of the blends, i.e., viscoplasticity, which can be simulated by the Chaboche viscoplastic model with nonlinear hardening variables.

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Section: Mechanical Properties Of Pla/pbs Blendssupporting

confidence: 80%

Testing, characterization and modelling of mechanical behaviour of poly (lactic-acid) and poly (butylene succinate) blends

Qiu

Song

Zhao

2016

Mech Adv Mater Mod Process

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“…Because polymer blending is a convenient approach to overcoming the individual disadvantages of polymers and it allows for the production of new materials with improved properties, several researchers have reported the study of PHBV–PLA blends as a way to overcome some limitations of PHBV. They have claimed that by decreasing the overall crystalline nature of the blend, the brittleness, for instance, can be reduced.…”

Section: Introductionmentioning

confidence: 99%

Compatibilization of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate)–poly(lactic acid) blends with diisocyanates

González‐Ausejo

Sánchez-Safont

Lagarón

et al. 2017

J of Applied Polymer Sci

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Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was blended with poly(lactic acid) (PLA) using various reactive processing agents in order to decrease its brittleness and enhance its processability. Three diisocyanates, namely, hexamethylene diisocyanate (HMDI), poly(hexamethylene) diisocyanate (polyHMDI) and 1,4-phenylene diisocyanate (PDI), were used as compatibilizing agents. The morphology, thermomechanical properties and rheological behavior were investigated using scanning electron microscopy (SEM), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), tensile tests, dynamo-mechanical thermal analysis in torsion mode (DMTA) and oscillatory rheometry with a parallel plate setup. The presence of the diisocyanates resulted in an enhanced polymer blend compatibility, thus leading to an improvement in the overall mechanical performance without affecting the thermal stability of the system. A slight reduction in PHBV crystallinity was observed with the incorporation of the diisocyanates. The addition of diisocyanates to the PHBV/PLA blend resulted in a notable increase in the final complex viscosity at low frequencies when compared with the same system without compatibilizers.2

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“…For this system they proposed that the elasticity ratio had an important effect on the phase inversion behaviour, in addition to viscosity, because PLA/PCL blends have such a high viscosity ratio. In a recent paper, Deng and Thomas [27] investigated synergistic effects of blending PLA with poly(butylene succinate) (PBS). In this system there was found to be a dramatic improvement in ductility with as little as 10 wt% of PBS added.…”

Section: Introductionmentioning

confidence: 99%

Optimising Ductility of Poly(Lactic Acid)/Poly(Butylene Adipate-co-Terephthalate) Blends Through Co-continuous Phase Morphology

et al. 2018

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This paper examines the effect of the melt viscosities of the two component polymers on the morphology and mechanical properties of a series of biodegradable polymer blends. Melt blended compounds of poly(lactic acid) (PLA) and poly(butylene adipate-co-terephthalate) (PBAT) are prepared and their melt viscosities, thermal properties, crystallinity, mechanical properties and phase morphology are investigated. From the relative melt viscosities of PLA and PBAT in the processing regime used in the study, it is possible to calculate the volume fraction at which a co-continuous phase structure is formed. The predicted value is 19 wt% of PBAT and this value is verified by the results of mechanical properties, where results for elongation-to-break show a dramatic rise from around 10% up to 300% in the composition range between 10 and 20 wt% of PBAT. The co-continuous phase structure is also validated by scanning electron microscopy. Graphical AbstractKeywords Poly(lactic acid) · Poly(butylene adipate-co-terephthalate) · Co-continuous phase · Biodegradable · Blends

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Blending poly(butylene succinate) with poly(lactic acid): Ductility and phase inversion effects

Cited by 154 publications

References 22 publications

Testing, characterization and modelling of mechanical behaviour of poly (lactic-acid) and poly (butylene succinate) blends

Testing, characterization and modelling of mechanical behaviour of poly (lactic-acid) and poly (butylene succinate) blends

Compatibilization of poly(3‐hydroxybutyrate‐co‐3‐hydroxyvalerate)–poly(lactic acid) blends with diisocyanates

Optimising Ductility of Poly(Lactic Acid)/Poly(Butylene Adipate-co-Terephthalate) Blends Through Co-continuous Phase Morphology

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