Micromechanisms of crack extension in unmodified and modified epoxy resins

It Meng Low; Yiu Wing Mai

doi:10.1016/0266-3538(88)90060-7

Micromechanisms of crack extension in unmodified and modified epoxy resins

It Meng Low, Yiu Wing Mai

Research output: Journal article publication › Journal article › Academic research › peer-review

26 Citations (Scopus)

Abstract

The failure behaviour of pure epoxy and modified epoxy resins has been studied in detail using fracture mechanics and scanning electron microscopy. The epoxy matrix was modified by a dispersion of rubbery and/or rigid fillers. The rubbery phase was a carboxyl-terminated butadiene-acrylonitrile rubber whilst the rigid fillers were either metastable zirconia (ZrO₂) particles or short alumina (Al₂O₃) fibres. These fillers were found to have a profound influence on the formation of stress-whitening zones and the concomitant slow crack growth behaviour. The geometry and the aspect ratio of fillers also appeared to dictate the extent of stress-whitening and stable crack growth.

Original language	English
Pages (from-to)	191-212
Number of pages	22
Journal	Composites Science and Technology
Volume	33
Issue number	3
DOIs	https://doi.org/10.1016/0266-3538(88)90060-7
Publication status	Published - 1988
Externally published	Yes

ASJC Scopus subject areas

Ceramics and Composites
General Engineering

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10.1016/0266-3538(88)90060-7

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AB - The failure behaviour of pure epoxy and modified epoxy resins has been studied in detail using fracture mechanics and scanning electron microscopy. The epoxy matrix was modified by a dispersion of rubbery and/or rigid fillers. The rubbery phase was a carboxyl-terminated butadiene-acrylonitrile rubber whilst the rigid fillers were either metastable zirconia (ZrO2) particles or short alumina (Al2O3) fibres. These fillers were found to have a profound influence on the formation of stress-whitening zones and the concomitant slow crack growth behaviour. The geometry and the aspect ratio of fillers also appeared to dictate the extent of stress-whitening and stable crack growth.

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Micromechanisms of crack extension in unmodified and modified epoxy resins

Abstract

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