Rotational Molding of Poly(lactic acid): Effect of Polymer Grade and Granulometry

2015 ◽  
Vol 36 (4) ◽  
pp. 477-482 ◽  
Author(s):  
Antonio Greco ◽  
Alfonso Maffezzoli
Keyword(s):  
Lactic Acid ◽  
Poly Lactic Acid ◽  
Rotational Molding ◽  
Acid Effect

Plasticization of poly(lactic acid) through blending with oligomers of lactic acid: Effect of the physical aging on properties

2015 ◽  
Vol 66 ◽  
pp. 533-542 ◽  
Author(s):  
Roberto Avolio ◽  
Rachele Castaldo ◽  
Gennaro Gentile ◽  
Veronica Ambrogi ◽  
Stefano Fiori ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Physical Aging ◽  
Poly Lactic Acid ◽  
Acid Effect

Rubber toughening of poly(lactic acid): Effect of stereocomplex formation at the rubber-matrix interface

2012 ◽  
Vol 128 (4) ◽  
pp. 2541-2547 ◽  
Author(s):  
Suming Ye ◽  
Ting Ting Lin ◽  
Weng Weei Tjiu ◽  
Pui Kwan Wong ◽  
Chaobin He
Keyword(s):  
Lactic Acid ◽  
Rubber Matrix ◽  
Poly Lactic Acid ◽  
Matrix Interface ◽  
Rubber Toughening ◽  
Acid Effect ◽  
Stereocomplex Formation

scholarly journals Rotational Molding of Poly(Lactic Acid)/Polyethylene Blends: Effects of the Mixing Strategy on the Physical and Mechanical Properties

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 217
Author(s):  
Eduardo Ruiz-Silva ◽  
Mirleth Rodríguez-Ortega ◽  
Luis Carlos Rosales-Rivera ◽  
Francisco Javier Moscoso-Sánchez ◽  
Denis Rodrigue ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Oxidative Degradation ◽  
Physical And Mechanical Properties ◽  
Poly Lactic Acid ◽  
Rotational Molding ◽  
Scanning Calorimetry ◽  
Polyethylene Blends ◽  
Twin Screw ◽  
Thermo Oxidative Degradation

In this study, blends of poly(lactic acid) (PLA)/linear medium density polyethylene (LMDPE) at different weight ratios were prepared by rotational molding. Two mixing strategies were used to evaluate the effect of phase dispersion on the physical and mechanical properties: (i) Dry-blending (DB) using a high shear mixer, and (ii) melt-blending (MB) using a twin-screw extruder. Thermal, morphological, and mechanical analyses were performed on the neat polymers and their blends. The thermal analysis was completed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA), and the blends prepared by MB had lower thermal stability than the ones prepared via DB due to some thermo-oxidative degradation through the double thermal process (extrusion and rotomolding). The morphology of the rotomolded parts showed that DB generated larger particle sizes (around 500 µm) compared to MB (around 5 µm) due to the shear and elongational stresses applied during extrusion. The tensile and flexural properties of the rotomolded parts combined the PLA stiffness with the LMDPE toughness independent of the blending technique. Neat PLA presented increments in tensile strength (54%) and flexural strength (111%) for DB compared with MB. A synergistic effect in impact strength was observed in blends with 12 and 25 wt. % of PLA prepared by DB.

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