Designing Of LDPE/fly Ash/ Expanded Graphite Sheet For Electrostatic Charge Dissipation Application

Anuj Gulati1,2, Swati Varshney2, Narayan Agarwal2 and Sundeep K. Dhawan1*

1CSIR-National Physical Laboratory, Dr K. S. Krishnan Road, New Delhi 110012, India

2Delhi Institute of Tool Engineering, New Delhi 110020, India

Adv. Mater. Lett., 2016, 7 (5), pp 360-365

DOI: 10.5185/amlett.2016.5841

Publication Date (Web): Apr 04, 2016

E-mail: skdhawan@mail.nplindia.ernet.in

Abstract


The paper aims to explore the utilization of industrial waste fly ash as a filler material into low density polyethylene (LDPE) polymer matrix with / without expanded graphite to optimize the electrostatic charge dissipative (ESD) properties as injection molded sheets. Homogeneous mixing of composite mixture has been carried out in a single screw extruder via melt blending and designed to sheet form by using an injection molding machine. The mechanical and thermal properties of the composite sheet depend on the formulation of composite material. The presence of fly ash particles and fly ash/ expanded graphite in the polymer system allows the composite sheet to acquire good mechanical and electrostatic charge dissipative properties. Static voltage decay rate and decay value measurement were carried out for LDPE and LDPE/fly ash/expanded graphite composite sheet. LDPE/fly ash/expanded graphite composite sheet having high percentage of expanded graphite showed good electrostatic charge dissipative properties. Further, structural analysis, surface morphology, thermal stability and mechanical properties have been explored by XRD, SEM, TGA and tensile testing. 

Keywords

Polymer, composite, tensile strength, electrostatic charge dissipation.

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