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Cyclic Nanoindentation and Nano-scratch Behaviour of CaCO3/PMMA Nanocomposite

Himel Chakraborty, Ananda Podder


The calcium carbonate surface modified with γ-methacryloxypropyltrimethoxysilane was carried out to prepare poly (methyl methacrylate) based composite. The grafting of PMMA increased as the weight ratio between MMA and n-CaCO3 increased, while the grafting efficiency of PMMA decreased. Transmission electron micrograph showed that MPTMS modified n-CaCO3 covered with PMMA was formed by emulsion polymerisation. The scratch resistance of n-CaCO3/PMMA nanocomposites are highly influenced by reinforcement’s type. The effects of n-CaCO3 on dynamic indentation behaviour of the composites were examined by a comparative study of the two methods was carried out under reduced system drift. The cyclic nanoindentation is a faster and prime technique enabling reliable measurement of the depth profile of bulk/nano-mechanical properties of nanocomposites. The tribological behaviour of nanocomposites was estimated and the deformed surfaces during the scratching were examined with atomic force micrographs.


Cyclic nanoindentation, hardness, mechanical properties, nanocomposite, PMMA

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