Effect of annealing on the mechanical properties of PLA/PCL and PLA/PCL/LTI polymer blends

Tetsuo Takayama; Mitsugu Todo; Hideto Tsuji

doi:10.1016/j.jmbbm.2010.10.003

Effect of annealing on the mechanical properties of PLA/PCL and PLA/PCL/LTI polymer blends

Tetsuo Takayama, Mitsugu Todo, Hideto Tsuji

Renewable Energy Center

Research output: Contribution to journal › Article › peer-review

81 Citations (Scopus)

Abstract

The effects of annealing on the mechanical properties of polymer blends of poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) were investigated. The bending strength and modulus of PLA/PCL tend to increase due to crystallization of the PLA phase by annealing. The mode I fracture energy, J _in, of PLA/PCL decreases dramatically due to the suppression of the ductile deformation of the spherical PCL phase by annealing. The immiscibility of PLA and PCL can be improved by adding lysine triisocyanate (LTI) as a result of additional polymerization. The phase transformation due to LTI addition reduces the size of the spherical PCL phase, resulting in higher fracture energy. An annealing process applied to PLA/PCL/LTI further strengthens the microstructure, resulting in effective improvement of the fracture energy.

Original language	English
Pages (from-to)	255-260
Number of pages	6
Journal	Journal of the Mechanical Behavior of Biomedical Materials
Volume	4
Issue number	3
DOIs	https://doi.org/10.1016/j.jmbbm.2010.10.003
Publication status	Published - Apr 2011

All Science Journal Classification (ASJC) codes

Biomaterials
Biomedical Engineering
Mechanics of Materials

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title = "Effect of annealing on the mechanical properties of PLA/PCL and PLA/PCL/LTI polymer blends",

abstract = "The effects of annealing on the mechanical properties of polymer blends of poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) were investigated. The bending strength and modulus of PLA/PCL tend to increase due to crystallization of the PLA phase by annealing. The mode I fracture energy, J in, of PLA/PCL decreases dramatically due to the suppression of the ductile deformation of the spherical PCL phase by annealing. The immiscibility of PLA and PCL can be improved by adding lysine triisocyanate (LTI) as a result of additional polymerization. The phase transformation due to LTI addition reduces the size of the spherical PCL phase, resulting in higher fracture energy. An annealing process applied to PLA/PCL/LTI further strengthens the microstructure, resulting in effective improvement of the fracture energy.",

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AU - Takayama, Tetsuo

AU - Todo, Mitsugu

AU - Tsuji, Hideto

PY - 2011/4

Y1 - 2011/4

N2 - The effects of annealing on the mechanical properties of polymer blends of poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) were investigated. The bending strength and modulus of PLA/PCL tend to increase due to crystallization of the PLA phase by annealing. The mode I fracture energy, J in, of PLA/PCL decreases dramatically due to the suppression of the ductile deformation of the spherical PCL phase by annealing. The immiscibility of PLA and PCL can be improved by adding lysine triisocyanate (LTI) as a result of additional polymerization. The phase transformation due to LTI addition reduces the size of the spherical PCL phase, resulting in higher fracture energy. An annealing process applied to PLA/PCL/LTI further strengthens the microstructure, resulting in effective improvement of the fracture energy.

AB - The effects of annealing on the mechanical properties of polymer blends of poly(lactic acid) (PLA) and poly(ε-caprolactone) (PCL) were investigated. The bending strength and modulus of PLA/PCL tend to increase due to crystallization of the PLA phase by annealing. The mode I fracture energy, J in, of PLA/PCL decreases dramatically due to the suppression of the ductile deformation of the spherical PCL phase by annealing. The immiscibility of PLA and PCL can be improved by adding lysine triisocyanate (LTI) as a result of additional polymerization. The phase transformation due to LTI addition reduces the size of the spherical PCL phase, resulting in higher fracture energy. An annealing process applied to PLA/PCL/LTI further strengthens the microstructure, resulting in effective improvement of the fracture energy.

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