Failure Mode of Epoxidised Natural Rubber - Microalumina Particle Composite (ENRAM) Using Electron Microscopy

M. M. Rosli, N. Mohamad, Che Husna Azhari

Research output: Contribution to journalConference article

Abstract

ENRAM at 50% ENR epoxidation at 5phr microalumina was evaluated for failure morphology in the tensile mode (tensile strength of) 19.9MPa at magnifications of 25x-3300x. The sample morphology before fracture showed uA particles with jagged edges due to agglomeration of finer particles. The mean particle size measured was 45μm. After fracture, the features observed on the fracture surfaces were i. ENR matrix ii. microalumina dispersed on the surfaces after being dislodged and iii. voids in the matrix. There was no matrix breakage observed, but predominantly pull-out of the microalumina agglomerated flakes leaving voids of 30μm-100μm. These values commiserated with the particle size range of the starting alumina particles. The voids showed an unusual surface with villi-like protrusions. The ENRAM particle pull-out failure can be explained by the failure model theory put forward by [1], where particle pull-out happened when the villi-microalumina agglomerated flakes adhesion was overcome. We would expect this mechanism to predominate as the particle sizes are greater than 10 μm, the critical size for pull-out to happen.

Original languageEnglish
Article number012099
JournalJournal of Physics: Conference Series
Volume1082
Issue number1
DOIs
Publication statusPublished - 10 Oct 2018
EventRegional Conference on Materials and ASEAN Microscopy Conference 2017, RCM and AMC 2017 - Penang, Malaysia
Duration: 12 Dec 201713 Dec 2017

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failure modes
rubber
electron microscopy
composite materials
voids
flakes
matrices
epoxidation
agglomeration
magnification
tensile strength
adhesion
aluminum oxides

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Failure Mode of Epoxidised Natural Rubber - Microalumina Particle Composite (ENRAM) Using Electron Microscopy. / Rosli, M. M.; Mohamad, N.; Azhari, Che Husna.

In: Journal of Physics: Conference Series, Vol. 1082, No. 1, 012099, 10.10.2018.

Research output: Contribution to journalConference article

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