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        Study of Mechanical and Thermomechanical Properties of Vinyl Ester/Polyurethane Interpenetrating Polymer Network Based Hybrid Composites

        Sudipta Goswami,Jagesh Kumar Ranjan 한국섬유공학회 2020 Fibers and polymers Vol.21 No.5

        Interpenetrating polymer networks of vinyl ester (VE) resin and polyurethane (PU) was synthesized using blendratio of 93:7 (w/w). Bio-composites with Kenaf fibre reinforcement in VE/PU IPN matrix were prepared by hand-lay-up. Similar bio-composites were prepared with vinyl silane treated kenaf (SKF) and fibre content was varied by 15, 25, 35 and40 wt. % of the matrix in both the cases. Hybrid composites consisting of both silica nano filler (2 wt. %) and 35 % of kenaffibre together in VE/PU IPN (93:7 w/w) matrix were prepared. Analysis of these composites showed that 93VESi35SKFhybrid composite possessed improved tensile strength, Young’s modulus and Interlaminar Shear Strength by 3.12, 0.24 %and 4.13 % respectively in comparison to that of the 93VESi35KF. Thus silane treatment of natural fibre caused better fibre/matrix adhesion in these hybrid composites. Also the same properties increased by 9.22, 18.53 and 22.07 % respectively for93VESi35SKF in comparison to that of 93VE35KF showing that the hybrid composite was stronger than the correspondingbio-composite without nanofiller.

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