Statistical Analysis of Polymer Nanocomposites for Mechanical Properties.

Shankar A Hallad,T M Yunus Khan,Sandeep V Gujjar,Masood Ashraf Ali,N R Banapurmath,Sharanabasava V Ganachari,Jayachandra S Yaradoddi,Anand M Hunashyal,Manzoore Elahi M Soudagar,Ashraf Elfasakhany,Md Irfanul Haque Siddiqui,M A Umarfarooq

doi:10.3390/molecules26144135

Abstract

Epoxy resins, due to their high stiffness, ease of processing, good heat, and chemical resistance obtained from cross-linked structures, have found applications in electronics, adhesives coatings, industrial tooling, and aeronautic and automotive industries. These resins are inherently brittle, which has limited their further application. The emphasis of this study is to improve the properties of the epoxy resin with a low-concentration (up to 0.4% by weight) addition of Multi-Walled Carbon Nanotubes (MWCNTs). Mechanical characterization of the modified composites was conducted to study the effect of MWCNTs infusion in the epoxy resin. Nanocomposites samples showed significantly higher tensile strength and fracture toughness compared to pure epoxy samples. The morphological studies of the modified composites were studied using Scanning Electron Microscopy (SEM).

Highlights

Nanoscience paves new avenues in the field of the scientific community as well as industry
The dosage of MultiWalled Carbon Nanotubes (MWCNTs) beyond 0.3 wt.% up to 0.4 wt.% tensile strength decreased, and this could be due to the sword in sheath mechanism of failure means the stress was primarily concentrated on the outside walls of the MWCNTs when compared to the inner walls before rupture [22]
In the case of a tensile test, comparing the results of plain polymer with composites reinforced with epoxy/MWCNTs, that is, in the case of specimen A3 (0.3 wt.%), it is observed that an increase in tensile strength by 61% as compared to the unfilled epoxy resin

Summary

Introduction

Nanoscience paves new avenues in the field of the scientific community as well as industry. One of the major problems with polymerbased composite is its intrinsically brittle type of failure, which is due to their minuscule tensile strength compared to their compressive strength and high fracture toughness [4] In appreciation of this flaw and to enhance polymer-based composites, extensive experimentation with filler reinforced composites has been carried out and encouraged [5]. The optimum mechanical properties were observed at 0.1 wt.% and 0.25 wt.% for tensile strength and flexural modulus of modified composites. An improvement in the tensile, flexural strength, and Young s modulus by 60%, 54%, and 26%, respectively, was observed with the addition of 0.25 wt.% of MWCNT in the CFRP

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