A Study of Some Mechanical Properties of Composite Materials with a Dammar-Based Hybrid Matrix and Reinforced by Waste Paper.

Marius Marinel Stănescu,Dumitru Bolcu

doi:10.3390/polym12081688

Abstract

When obtaining environment-friendly hybrid resins made of a blend of Dammar natural resin, in a prevailing volume ratio, with epoxy resin, it is challenging to find alternatives for synthetic resins. Composite materials reinforced with waste paper and matrix made of epoxy resin or hybrid resin with a volume ratio of 60%, 70% and 80% Dammar were studied. All samples obtained have been submitted to tensile tests and Scanning Electron Microscopy (SEM) analysis. The tensile response, tensile strength, modulus of elasticity, elongation at break and the analysis of the fracture surface were determined. The damping properties of vibrations of bars in hybrid resins and in the composite materials under study were also examined. The mechanical properties of the four types of resins and of the composite materials were compared. The chemical composition for a hybrid resin specimen were obtained using the Fourier Transformed Infrared Spectroscopy (FTIR) and Energy, Dispersive X-ray Spectrometry (EDS) analyzes.

Highlights

The last decades have seen an increased use of composite materials, whose components, matrix and/or reinforcing agents come from nature
The first purpose of this article is to study the properties of composite materials with reinforcement from paper waste
The experimental results for the three types of hybrid resin samples were presented, which were submitted to the tensile test, Fourier Transformed Infrared Spectroscopy (FTIR), EDS and Scanning Electron Microscopy (SEM) analyzes and the vibration analysis

Summary

Introduction

The last decades have seen an increased use of composite materials, whose components, matrix and/or reinforcing agents come from nature. These new types of materials are called “green composites”, or “bio-composites”. The first purpose of this article is to study the properties of composite materials with reinforcement from paper waste (containing cellulose obtained from natural fibers). The specific tensile strength and toughness make natural fibers be an alternative to traditional reinforcements, such as glass fibers or other filling materials. The mechanical properties of natural fibers are usually much worse than traditional reinforcing materials, in general, even to the glass fiber. One justification would be Polymers 2020, 12, 1688; doi:10.3390/polym12081688 www.mdpi.com/journal/polymers

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