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An Experimental Investigation of Impact Resistance, Hardness and Flexural Behavior of Polypropylene Augmented with Recycled Epoxy Powder for Automobile Applications

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Abstract:

Polypropylene is a versatile thermoplastic that finds applications in automotive, aerospace, chemical and domestic industries due to its excellent mechanical and chemical properties and cost-effectiveness. Epoxy is a thermoset polymer that is often reinforced with various types of fibers like carbon fiber, glass fiber etc. to tailor its properties for specific applications. Epoxy Composites Market in 2023 was valued around USD 38.1bn and is estimated to attain a market worth of over USD 74bn by 2032 due to rapid replacement of conventional materials in automotive and aerospace applications. Major portion of the disposed epoxy composites parts after their service life goes to land filling which leads to soil pollution. In this novel study an attempt is made to fabricate the polypropylene composite by reinforcing micro particles of cross linked epoxy. The Flexural strength, Hardness and Izod impact behavior of polypropylene composite was studied at 5%, 10%, 15% and 20% of cross linked micro epoxy particles. The proportions of cross linked micro epoxy particles have positive impact on Hardness and Yield Flexural strength but negative impact on Izod – Impact resistance. The Yield Flexural strength increases with increase in proportion of cross linked epoxy particles, flexural strength increases about 26.3% for 20% reinforcement of cross linked Epoxy particles. The Izod Impact resistance is unaltered upto 10% of cross linked micro epoxy particles and then decreases with increase in proportion of cross linked epoxy particles, Izod - Impact strength decreases about 36.12% for 20% reinforcement of cross linked Epoxy particles. X-ray diffraction and Scanning Electron microscopy at specimen fracture surface ensures that the micro epoxy particles dispersed uniformly in the matrix material.

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Periodical:

Materials Science Forum (Volume 1195)

Pages:

157-172

DOI:

https://doi.org/10.4028/p-DxxQG3

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Online since:

June 2026

Authors:

H. S. Kumara Swamy*, G. Narasimhaiah, C. K. Umesh

Keywords:

Cross Linked Epoxy, Flexural Strength, Impact Strength, Mechanical Properties, Polypropylene, SEM

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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