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The rheological behaviour and thermal ageing characteristics of PP/MWCNT/glass fibre multiscale composites

Publication Type : Journal Article

Publisher : Polymers and Polymer Composites

Source : Polymers and Polymer Composites, Impact factor: 1.841, Cite score: 1.6, 32 percentile (2021)

Url : https://doi.org/10.1177/0967391121992909

Campus : Coimbatore

School : School of Engineering

Center : Center for Excellence in Advanced Materials and Green Technologies

Department : Chemical

Year : 2021

Abstract : Multiscale hybrid composites were prepared using varying weight percentages (0 to 5) of multiwalled carbon nanotubes (MWCNTs) as nanofiller and a fixed weight percentage (20) of short glass fibres as micro filler (in polypropylene (PP) matrix. The shear and extensional viscosity of the composites was measured using a capillary rheometer. It was observed that even at higher shear rates the synergism of micro and nanofillers in the matrix significantly enhanced the melt viscosity. The complex nanotube network entanglement with micro fillers and PP chains imparted restrictions to the polymer chain movements. The prepared samples were subjected to thermal ageing at 100°C for 4 days in hot air oven. After ageing, multiscale composite with 3 wt% MWCNTs exhibited 28.57% enhancement in strain at break, whereas the tensile strength and modulus reduced by 6.8% and 8% respectively. The fracture toughness properties like strain energy release rate and critical stress intensity factor were not affected for multiscale composite at the optimum content of 3 wt% MWCNT, even after thermal ageing.

Cite this Research Publication : Rasana Nanoth, Dr. Jayanarayanan K., Rajan, K. Prasad, and Gopanna, A., “The rheological behaviour and thermal ageing characteristics of PP/MWCNT/glass fibre multiscale composites”, Polymers and Polymer Composites, Impact factor: 1.841, Cite score: 1.6, 32 percentile (2021)

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