Influence of the morphology and viscoelasticity on the thermomechanical properties of poly(lactic acid)/thermoplastic polyurethane blends compatibilized with ethylene‐ester copolymer

Poly(lactic acid) (PLA) based composites are biodegradable; their disposal after single use may be needless and uneconomical. Prodigal disposal of these composites could also create an environmental concern and additional demand for biobased feedstock. Under these circumstances, recycling could be an effective solution, since it will widen the composite service life and prevent the excessive use of natural resources. This research investigates an in-depth impact of recycling on the mechanical and thermomechanical properties of oak wood flour based PLA composites. Two composite formulations (30 and 50 wt% filler), each with 3 wt% coupling agent (PLA-g-MA), were produced and reprocessed six times by extrusion followed by injection molding. Measurements of fiber length and molecular weight of polymer were, respectively, carried out by gel permeation chromatography (GPC). Scanning electron microscopy (SEM), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FTIR) tools were used to study morphological and molecular alterations. With consecutive recycling, PLA composites showed a gradual decrease in strength and stiffness properties and an increase in strain properties. The 50% and 30% filler concentration of fibers in the composite showed an abrupt decrease in strength properties after six and two reprocessing cycles, respectively.

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Composites of poly(lactic) acid/thermoplastic polyurethane/mica with compatibilizer: morphology, miscibility and interphase

RSC Advances ◽

10.1039/c5ra17938f ◽

2015 ◽

Vol 5 (120) ◽

pp. 98915-98924 ◽

Cited By ~ 8

Author(s):

Shikui Jia ◽

Zhong Wang ◽

Yan Zhu ◽

LiGui Chen ◽

Lei Fu

Keyword(s):

Mechanical Properties ◽

Lactic Acid ◽

Thermoplastic Polyurethane ◽

Poly Lactic Acid

Relationship between mechanical properties and morphology of poly(lactic) acid (PLA)/thermoplastic polyurethane (TPU)/mica composites.

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Effects of thermoplastic polyurethane on the properties of poly(lactic acid)/organo-montmorillonite nanocomposites based on novel vane extruder

Polymer Engineering & Science ◽

10.1002/pen.23781 ◽

2013 ◽

Vol 54 (10) ◽

pp. 2292-2300 ◽

Cited By ~ 12

Author(s):

Shikui Jia ◽

Jinping Qu ◽

Rongyuan Chen ◽

Chengran Wu ◽

Zan Huang ◽

...

Keyword(s):

Lactic Acid ◽

Thermoplastic Polyurethane ◽

Poly Lactic Acid ◽

Montmorillonite Nanocomposites

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Analysis of thermomechanical properties of polymeric materials produced by a 3D printing method

Tehnički glasnik ◽

10.31803/tg-20191102120738 ◽

2019 ◽

Vol 13 (4) ◽

pp. 343-348

Author(s):

Adam Gnatowski ◽

Rafał Gołębski ◽

Piotr Sikora

Keyword(s):

3D Printing ◽

Ethylene Terephthalate ◽

Dynamic Properties ◽

Thermoplastic Polyurethane ◽

Polymeric Materials ◽

Acrylonitrile Butadiene Styrene ◽

Thermomechanical Properties ◽

Poly Lactic Acid ◽

Thermoplastic Polyurethane Elastomer ◽

Butadiene Styrene

A comparative analysis of the thermomechanical properties of semicrystalline and amorphous polymeric materials was carried out. Samples were produced by using a 3D printing technology on the SIGNAL printer - ATMAT. The following polymeric materials were used to make the samples: TPU-thermoplastic polyurethane elastomer, ABScopolymer acrylonitrile-butadiene-styrene, Nosewood, PET-ethylene terephthalate, PLA-poly (lactic acid). The research included a thermal analysis of the dynamic properties (DMTA) of manufactured materials.

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