Toughening mechanisms of rubber toughened PMMA

Mitsugu Todo; Kiyoshi Takahashi; P. Y. Ben Jar; Philippe Béguelin

doi:10.1299/jsmea.42.585

Toughening mechanisms of rubber toughened PMMA

Mitsugu Todo^*, Kiyoshi Takahashi, P. Y. Ben Jar, Philippe Béguelin

^*Corresponding author for this work

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

24 Citations (Scopus)

Abstract

Toughening mechanisms of three types of rubber toughened poly (methyl methacrylate) (RT-PMMA) were investigated under mode 1 loading condition by optical and electron microscopies in conjunction with the quantitative evaluation of mode I fracture toughness. Polarizing optical microscopy clearly exhibited damage zone development ahead of a crack-tip in the RT PMMA's. The three RT PMMA's revealed different shapes of the damage zone. Transmission electron microscopy exhibited microcrazes generated in the equator of rubber particles within the damage zones. Extensive deformation of rubber particles corresponding to localized shear yielding of the PMMA matrix was also found in a region close to a propagating cracktip. In addition, cavitation of rubber particles was observed in the vicinity of the crack. It is therefore understood that the toughening of the RT PMMA's is due to energy dissipation caused by the microdamage formations such as microcrazing, matrix shear deformation and rubber particle captation ahead of the crack-tip.

Original language	English
Pages (from-to)	585-591
Number of pages	7
Journal	JSME International Journal, Series A
Volume	42
Issue number	4
DOIs	https://doi.org/10.1299/jsmea.42.585
Publication status	Published - Oct 1999

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title = "Toughening mechanisms of rubber toughened PMMA",

abstract = "Toughening mechanisms of three types of rubber toughened poly (methyl methacrylate) (RT-PMMA) were investigated under mode 1 loading condition by optical and electron microscopies in conjunction with the quantitative evaluation of mode I fracture toughness. Polarizing optical microscopy clearly exhibited damage zone development ahead of a crack-tip in the RT PMMA's. The three RT PMMA's revealed different shapes of the damage zone. Transmission electron microscopy exhibited microcrazes generated in the equator of rubber particles within the damage zones. Extensive deformation of rubber particles corresponding to localized shear yielding of the PMMA matrix was also found in a region close to a propagating cracktip. In addition, cavitation of rubber particles was observed in the vicinity of the crack. It is therefore understood that the toughening of the RT PMMA's is due to energy dissipation caused by the microdamage formations such as microcrazing, matrix shear deformation and rubber particle captation ahead of the crack-tip.",

keywords = "Crack Propagation, Fracture Toughness, High Polymer Materials, Microcrazing, Toughening Mechanism",

author = "Mitsugu Todo and Kiyoshi Takahashi and {Ben Jar}, {P. Y.} and Philippe B{\'e}guelin",

year = "1999",

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AU - Todo, Mitsugu

AU - Takahashi, Kiyoshi

AU - Ben Jar, P. Y.

AU - Béguelin, Philippe

PY - 1999/10

Y1 - 1999/10

N2 - Toughening mechanisms of three types of rubber toughened poly (methyl methacrylate) (RT-PMMA) were investigated under mode 1 loading condition by optical and electron microscopies in conjunction with the quantitative evaluation of mode I fracture toughness. Polarizing optical microscopy clearly exhibited damage zone development ahead of a crack-tip in the RT PMMA's. The three RT PMMA's revealed different shapes of the damage zone. Transmission electron microscopy exhibited microcrazes generated in the equator of rubber particles within the damage zones. Extensive deformation of rubber particles corresponding to localized shear yielding of the PMMA matrix was also found in a region close to a propagating cracktip. In addition, cavitation of rubber particles was observed in the vicinity of the crack. It is therefore understood that the toughening of the RT PMMA's is due to energy dissipation caused by the microdamage formations such as microcrazing, matrix shear deformation and rubber particle captation ahead of the crack-tip.

AB - Toughening mechanisms of three types of rubber toughened poly (methyl methacrylate) (RT-PMMA) were investigated under mode 1 loading condition by optical and electron microscopies in conjunction with the quantitative evaluation of mode I fracture toughness. Polarizing optical microscopy clearly exhibited damage zone development ahead of a crack-tip in the RT PMMA's. The three RT PMMA's revealed different shapes of the damage zone. Transmission electron microscopy exhibited microcrazes generated in the equator of rubber particles within the damage zones. Extensive deformation of rubber particles corresponding to localized shear yielding of the PMMA matrix was also found in a region close to a propagating cracktip. In addition, cavitation of rubber particles was observed in the vicinity of the crack. It is therefore understood that the toughening of the RT PMMA's is due to energy dissipation caused by the microdamage formations such as microcrazing, matrix shear deformation and rubber particle captation ahead of the crack-tip.

KW - Crack Propagation

KW - Fracture Toughness

KW - High Polymer Materials

KW - Microcrazing

KW - Toughening Mechanism

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JF - JSME International Journal, Series A

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ER -

Toughening mechanisms of rubber toughened PMMA

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