Rheology, mechanical properties and crystallization behavior of glycidyl methacrylate grafted poly(ethylene octene) toughened poly(lactic acid) blends

2016 ◽  
Vol 33 (3) ◽  
pp. 1104-1114 ◽  
Author(s):  
Yan Zhao ◽  
Ye Zhang ◽  
Zonglin Li ◽  
Hongwei Pan ◽  
Qinglin Dong ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Glycidyl Methacrylate ◽  
Crystallization Behavior ◽  
Poly Lactic Acid ◽  
Poly Ethylene

Crystallization behavior and mechanical properties of poly(lactic acid) complex fiber toughened by carbon nanotube nanocapsules

2017 ◽  
Vol 88 (14) ◽  
pp. 1616-1627 ◽  
Author(s):  
Shu-qiang Liu ◽  
Gai-hong Wu ◽  
Yun-chao Xiao ◽  
Hong-xia Guo ◽  
Fen-juan Shao
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Lactic Acid ◽  
Thermal Properties ◽  
Carbon Nanotube ◽  
Crystallization Behavior ◽  
Poly Lactic Acid ◽  
Acid Complex ◽  
Main Obstacle ◽  
Industrial Areas

Poly(lactic acid) (PLA) fiber, owing to its biocompatibility and biodegradability, could be widely used in many related industrial areas. However, high brittleness has been the main obstacle to expanding its applications. So in this paper, carbon nanotube (CNT) nanocapsules were designed to toughen PLA and further reported their effect on the crystallization behavior and mechanical properties of PLA complex fiber. These designed CNT nanocapsules successfully solved the agglomeration of CNTs within the PLA matrix as well as the compatibility issue. In addition, the morphological, mechanical, optical and thermal properties of PLA complex fibers were also studied. The addition of CNT nanocapsules obviously improved the crystallization behavior of PLA fiber. Furthermore, compared with pure PLA, the tensile strength of PLA complex fiber was enhanced by 30.62% and the elongation by 32.2%, so the designed CNT nanocapsules could be used as a toughener for PLA fiber. This research benefits the extension of PLA applications where toughness is an important factor.

scholarly journals Chitin Nanofibrils in Poly(Lactic Acid) (PLA) Nanocomposites: Dispersion and Thermo-Mechanical Properties

2019 ◽  
Vol 20 (3) ◽  
pp. 504 ◽  
Author(s):  
Maria-Beatrice Coltelli ◽  
Patrizia Cinelli ◽  
Vito Gigante ◽  
Laura Aliotta ◽  
Pierfrancesco Morganti ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Ethylene Glycol ◽  
Morphological Properties ◽  
Water Evaporation ◽  
Poly Lactic Acid ◽  
Poly Ethylene Glycol ◽  
Water Suspension ◽  
Poly Ethylene ◽  
Reinforcing Filler

Chitin-nanofibrils are obtained in water suspension at low concentration, as nanoparticles normally are, to avoid their aggregation. The addition of the fibrils in molten PLA during extrusion is thus difficult and disadvantageous. In the present paper, the use of poly(ethylene glycol) (PEG) is proposed to prepare a solid pre-composite by water evaporation. The pre-composite is then added to PLA in the extruder to obtain transparent nanocomposites. The amount of PEG and chitin nanofibrils was varied in the nanocomposites to compare the reinforcement due to nanofibrils and plasticization due to the presence of PEG, as well as for extrapolating, where possible, the properties of reinforcement due to chitin nanofibrils exclusively. Thermal and morphological properties of nanocomposites were also investigated. This study concluded that chitin nanofibrils, added as reinforcing filler up to 12% by weight, do not alter the properties of the PLA based material; hence, this additive can be used in bioplastic items mainly exploiting its intrinsic anti-microbial and skin regenerating properties.

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