Effect of drawing condition on mechanical properties and molecular orientation of self-reinforced poly(lactic acid) screws

Sakaguchi, Masato; Kobayashi, Satoshi

doi:10.1080/09243046.2014.951197

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…The PLA billet's FEM deformation behavior was analyzed, because the orientation behavior depends only on deformation in analysis of the chain network models. As a simple drawing method in bulk processes, extrusion has been the focus of previous work (Droscher, 1982;Sakaguchi and Kobayashi, 2015;Weiler and Gogolewski, 1996). The extrusion is one of methods for drawing polymer billet.…”

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confidence: 99%

Analysis of orientation behavior in poly(lactic acid) billets during extrusion using a finite element method and chain network model

Sakaguchi

Mituoka

Kobayashi

et al. 2019

Mechanical Engineering Journal

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Analysis of orientation behavior in poly(lactic acid) billets during extrusion using a finite element method and chain network model IntroductionPoly(lactic acid) (PLA) has high biocompatibility because it is nonenzymatically hydrolyzed to nontoxic lactic acid within the body. Therefore, PLA bone fixation devices have been developed and clinically applied for the treatment of bone fractures (Bergsma et al., 1993;Partio et al., 1992;Yamamuro et al., 1994). However, the application of PLA bone fixation devices is limited to low-load regions, such as the oral-maxillofacial region, because the mechanical properties of PLA are poor. Molecular orientation via the process of drawing has attracted much attention in relation to increasing the mechanical properties of plastics without reinforcement. Bone fixation devices molded from drawn plastics have been studied (

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confidence: 99%

Analysis of orientation behavior in poly(lactic acid) billets during extrusion using a finite element method and chain network model

Sakaguchi

Mituoka

Kobayashi

et al. 2019

Mechanical Engineering Journal

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“…These results suggested that the orientation function in the extruded rod increased with the ER and the TCP content. The mechanical properties of PLA at the drawn direction increased with the orientation function and/or degree of orientation (Droscher and Bandara, 1982;Sakaguchi and Kobayashi, 2015). Therefore, the mechanical properties of the extruded rod might increase with the ER and the TCP content.…”

Section: Effect Of the Tcp Content And Extrusion Condition On The Orientation Behaviormentioning

confidence: 99%

“…The drawing of a polymer, such as PLA, has been investigated to improve mechanical properties (Leenslag and Pennings, 1987;Eling et al, 1982;Droscher and Bandara, 1982;Li et al, 2020;Sakaguchi and Kobayashi, 2015). Leenslag and Pennings (1987) reported that the PLA fiber strength reached 2.1 GPa by dry spinning and subsequent hot drawing.…”

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confidence: 99%

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Analysis of orientation behavior in extruded tricalcium phosphate/poly(lactic acid) composite billet using finite element method and chain network model

Sakaguchi

Kobayashi

2021

Mechanical Engineering Journal

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Poly(lactic acid) (PLA) has been investigated as a material for a bone fixation device because it is bioabsorbable and nontoxic (Bergsma et al.;1993, Partio et al., 1992Yamamuro et al., 1994). However, the application of the PLA bone fixation device is limited because of low stiffness, osteoconductivity, and radiolucency. Therefore, the composites of PLA and bioactive ceramics have also been investigated. This study focuses on bioabsorbable tricalcium phosphate (TCP) as one of the various bioactive ceramics and investigates the TCP/PLA composite. The mechanical properties, particularly strength, of particle-filled composites, such as TCP/PLA, are decreased by the stress concentration around the filler particle. Therefore, the effect of the particle surface modification on the mechanical properties of the particle-filled composites is studied (Qiu et al., 2005;Cui et al., 2009;Kunze et al., 2003). Qiu et al. modified hydroxyapatite (HA) nanoparticles using an L-lactic acid oligomer (Qiu et al., 2005). As a result, the tensile strength, Analysis of orientation behavior in extruded tricalcium phosphate/poly(lactic acid) composite billet using finite element method and chain network model

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Environmentally Friendly Polylactic Acid/Modified Lignosulfonate Biocomposites

et al. 2016

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Effect of drawing condition on mechanical properties and molecular orientation of self-reinforced poly(lactic acid) screws

Cited by 7 publications

References 12 publications

Analysis of orientation behavior in poly(lactic acid) billets during extrusion using a finite element method and chain network model

Analysis of orientation behavior in poly(lactic acid) billets during extrusion using a finite element method and chain network model

Analysis of orientation behavior in extruded tricalcium phosphate/poly(lactic acid) composite billet using finite element method and chain network model

Environmentally Friendly Polylactic Acid/Modified Lignosulfonate Biocomposites

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