Synthesis and Characterisation of Polyester Resin Matrix Composites Reinforced with Beans Pod Micro Particles
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Date
2017
Authors
Durowaye, S.
Sekunowo, O.
Sekunowo, O.
Lawal, G.
Kuforiji, C.
Adeyemi, A.
Journal Title
Journal ISSN
Volume Title
Publisher
Usak University Journal of Material Sciences
Abstract
Polymers have limitations which are amongst low stiffness and low resistance to impact loading. They do
not usually exhibit the requisite mechanical strength for applications in various fields. This research
evaluated the effects of particulate carbonized and uncarbonized beans pod additions on the mechanical
properties and microstructure of unsaturated polyester resin matrix composites in order to assess the
possibility of their non-structural application. Carbonized beans pod were prepared by packing the beans
pod in a graphite crucible and heated in an electric muffle furnace at temperature 1000°C for 5 hours then
milled and sieved. 150 μm carbonized and uncarbonized reinforcing beans pod particles were separately
added to unsaturated polyester from 5 wt. % to 25 wt. % and cast in a wooden mould. The results show that
the impact strength increases with increasing wt. % reinforcement. The flexural modulus (1023.4 MPa) of
pure unsaturated polyester is lower than that of carbonized sample (1591.58 MPa) and uncarbonized
sample (1080.30 MPa) at 10 wt. % reinforcement. The reinforced samples can be used in place of pure
unsaturated polyester resin where high flexibility is needed. The microstructure shows a decrease in
homogeneity with increasing wt. % of filler addition beyond 15 wt. %. This results into poor interfacial
bonding of the particles-matrix leading to reduction in the mechanical properties of the composites
especially hardness and tensile strength. The microstructure also indicated a fairly uniform distribution of
the beans pod particles in the matrix at reinforcement below 15 wt. % which accounts for the improvement
in the mechanical properties. The obtained results show that the beans pod waste could be used as ecofriendly reinforcement in the production of polymer matrix composites.
Description
Keywords
Polymer matrix composites, unsaturated polyester resin, beans pod particles, mechanical properties, microstructure.
Citation
Durowaye, S.; Sekunowo, O.; Sekunowo, O.; Lawal, G.; Kuforiji, C.; Adeyemi, A. (2017). Synthesis and Characterisation of Polyester Resin Matrix Composites Reinforced with Beans Pod Micro Particles. Usak University Journal of Material Sciences 41-50