Abstract
In this study, banana fibre surfaces were chemically modified and composites using polypropylene as a matrix were prepared. The FTIR analysis confirmed that the esterification increased the crystallinity and thermal stability of the acetylated fibres. Composites showed a decrease in the melt flow index and a slight reduction in density and hardness in relation to the matrix. Good matrix/fibre adhesion was observed by SEM micrographs.
Highlights
RESUMO Neste estudo, superfícies de fibras de bananeira foram quimicamente modificadas e compósitos utilizando polipropileno como matriz foram preparados
The peak at around 1740 cm-1 is due to the esterification of the hydroxyl groups, which results in an increased stretching vibration of the carbonyl (C=O) group present in the ester bonds
The appearance of the peak at around 1740 cm-1 for the acetylated fibres indicates that the acetyl groups are involved in an ester bond with the hydroxyl groups of the fibres
Summary
RESUMO Neste estudo, superfícies de fibras de bananeira foram quimicamente modificadas e compósitos utilizando polipropileno como matriz foram preparados. Plastic materials made from petroleum are not biodegradable, but they are relatively easy to recycle. Reinforcement of polymer matrix composites with natural fibres is being widely used since these naturally occurring fibres are biodegradable, environmentally friendly and inex-. AS&T Volume 6, Number 1, Jun 2018 pensive. Because of their distinct advantages, natural fibres can be used in plastics and packaging industries instead of synthetic fibres. The study of interfacial properties is important to produce high-performance natural fibre composites (Awal et al, 2011). Composite materials were prepared using postconsumed polypropylene (rPP) as a matrix and chemically modified banana fibres as reinforcement in different proportions. The main objective was to observe the influence of the modified banana fibres on the composites’ properties, such as density, hardness and MFI, and to correlate these results with the composites’ morphology, obtained by SEM
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