Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures

Tetsuo Takayama; Mitsugu Todo; Hideto Tsuji; Kazuo Arakawa

doi:10.1295/koron.63.626

Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures

Tetsuo Takayama, Mitsugu Todo, Hideto Tsuji, Kazuo Arakawa

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

5 Citations (Scopus)

Abstract

The blends of poly (lactic acid) (PLA) and poly (ε-caprolactone) (PCL) were prepared by melt blending using lysine triisocyanate (LTI) as a compatibilizer to improve blend miscibility. Critical J-integral at crack initiation, J_in, was measured as a fracture energy parameter, and crystallinity, X_c,PLA, and molecular weight, M_w, were evaluated by DSC and GPC, respectively. J_in and M_w tend to increase, while X_c,PLA decreases, as the LTI content increase. Increased M_w and reduced x_c,PLA are both considered to be due to crosslinking reaction of added LTI. It is also found that the decreased size of spherical PCL phase results in the improvement of J_in indicating that the size change of dispersed PCL phase due to LTI addition plays an important role in determining J_in value.

Original language	English
Pages (from-to)	626-632
Number of pages	7
Journal	KOBUNSHI RONBUNSHU
Volume	63
Issue number	9
DOIs	https://doi.org/10.1295/koron.63.626
Publication status	Published - Sept 2006

All Science Journal Classification (ASJC) codes

Chemical Engineering (miscellaneous)
Materials Science (miscellaneous)
Environmental Science(all)
Polymers and Plastics

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10.1295/koron.63.626

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title = "Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures",

abstract = "The blends of poly (lactic acid) (PLA) and poly (ε-caprolactone) (PCL) were prepared by melt blending using lysine triisocyanate (LTI) as a compatibilizer to improve blend miscibility. Critical J-integral at crack initiation, Jin, was measured as a fracture energy parameter, and crystallinity, Xc,PLA, and molecular weight, Mw, were evaluated by DSC and GPC, respectively. Jin and Mw tend to increase, while Xc,PLA decreases, as the LTI content increase. Increased Mw and reduced xc,PLA are both considered to be due to crosslinking reaction of added LTI. It is also found that the decreased size of spherical PCL phase results in the improvement of Jin indicating that the size change of dispersed PCL phase due to LTI addition plays an important role in determining Jin value.",

author = "Tetsuo Takayama and Mitsugu Todo and Hideto Tsuji and Kazuo Arakawa",

year = "2006",

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publisher = "The Society of Polymer Science, Japan",

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T1 - Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures

AU - Takayama, Tetsuo

AU - Todo, Mitsugu

AU - Tsuji, Hideto

AU - Arakawa, Kazuo

PY - 2006/9

Y1 - 2006/9

N2 - The blends of poly (lactic acid) (PLA) and poly (ε-caprolactone) (PCL) were prepared by melt blending using lysine triisocyanate (LTI) as a compatibilizer to improve blend miscibility. Critical J-integral at crack initiation, Jin, was measured as a fracture energy parameter, and crystallinity, Xc,PLA, and molecular weight, Mw, were evaluated by DSC and GPC, respectively. Jin and Mw tend to increase, while Xc,PLA decreases, as the LTI content increase. Increased Mw and reduced xc,PLA are both considered to be due to crosslinking reaction of added LTI. It is also found that the decreased size of spherical PCL phase results in the improvement of Jin indicating that the size change of dispersed PCL phase due to LTI addition plays an important role in determining Jin value.

AB - The blends of poly (lactic acid) (PLA) and poly (ε-caprolactone) (PCL) were prepared by melt blending using lysine triisocyanate (LTI) as a compatibilizer to improve blend miscibility. Critical J-integral at crack initiation, Jin, was measured as a fracture energy parameter, and crystallinity, Xc,PLA, and molecular weight, Mw, were evaluated by DSC and GPC, respectively. Jin and Mw tend to increase, while Xc,PLA decreases, as the LTI content increase. Increased Mw and reduced xc,PLA are both considered to be due to crosslinking reaction of added LTI. It is also found that the decreased size of spherical PCL phase results in the improvement of Jin indicating that the size change of dispersed PCL phase due to LTI addition plays an important role in determining Jin value.

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Improvement of fracture properties of PLA/PCL polymer blends by control of phase structures

Abstract

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