Effects of isothermal crystallization on fracture toughness and crack growth behavior of poly (lactic acid)

Sang Dae Park; Mitsugu Todo; Kazuo Arakawa

doi:10.1007/s10853-005-6534-z

Effects of isothermal crystallization on fracture toughness and crack growth behavior of poly (lactic acid)

Sang Dae Park, Mitsugu Todo, Kazuo Arakawa

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Abstract

A study to characterize the effect of isothermal crystallization on the mode I fracture toughness of polylactic acid (PLA) solids was discussed. An amorphous and six crystallined PLA plates were prepared by quenching and annealing and their crystalline structures were characterized by polarizing optical microscopy (POM). The thermal properties of these six PLA plates were measured by a differential scanning calorimetry (DSC). Mode I fracture toughness was estimated at a quasi-static loading rate and then correlated with the crack growth behavior characterized by POM. A unique dependence of crystallinity on K_IC was found and the change of K_IC was closely related to the changes of microstructure and crack growth behavior.

Original language	English
Pages (from-to)	1055-1058
Number of pages	4
Journal	Journal of Materials Science
Volume	40
Issue number	4
DOIs	https://doi.org/10.1007/s10853-005-6534-z
Publication status	Published - Feb 1 2005

All Science Journal Classification (ASJC) codes

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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abstract = "A study to characterize the effect of isothermal crystallization on the mode I fracture toughness of polylactic acid (PLA) solids was discussed. An amorphous and six crystallined PLA plates were prepared by quenching and annealing and their crystalline structures were characterized by polarizing optical microscopy (POM). The thermal properties of these six PLA plates were measured by a differential scanning calorimetry (DSC). Mode I fracture toughness was estimated at a quasi-static loading rate and then correlated with the crack growth behavior characterized by POM. A unique dependence of crystallinity on KIC was found and the change of KIC was closely related to the changes of microstructure and crack growth behavior.",

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AB - A study to characterize the effect of isothermal crystallization on the mode I fracture toughness of polylactic acid (PLA) solids was discussed. An amorphous and six crystallined PLA plates were prepared by quenching and annealing and their crystalline structures were characterized by polarizing optical microscopy (POM). The thermal properties of these six PLA plates were measured by a differential scanning calorimetry (DSC). Mode I fracture toughness was estimated at a quasi-static loading rate and then correlated with the crack growth behavior characterized by POM. A unique dependence of crystallinity on KIC was found and the change of KIC was closely related to the changes of microstructure and crack growth behavior.

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Effects of isothermal crystallization on fracture toughness and crack growth behavior of poly (lactic acid)

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