Abstract
In this research article, we investigate the physical and mechanical properties of composites comprised of unsaturated polyester resin (UPR) and recycled polyethylene terephthalate (PET) with 10% to 40% volume of bamboo fibre (BF). Chemical evaluation of BF revealed that BF has a cellulose content of 49.86%, hemicellulose content of 25.17%, and lignin content of 7.14%. As the UPR’s different connections, FTIR identified an interconnecting framework between the styrene monomer (ST) and the unsaturated polyester (UP). It was found by TGA-DTG that there were two breakdown phases. UPR’s physical and mechanical properties were found to be affected by increasing the amount of fibre in the material, with the water absorption rising from 0.7% to 2.81% and the density (1214.38 to 1168.83 kg/m), flexural strength (51.81 to 28.92 MPa), flexural modulus (2.78 to 2.83 GPa), and tensile strength (9.71 to 3.86 MPa) all decreasing at the same time. On the other hand, the hardness increased from 82.4 Shore D to 67.9 Shore D. Fibre distribution flaws in the UPR were found, affecting the composites' mechanical characteristics. By repurposing two waste products, this study helps create new materials that are better for the surroundings.
Highlights
We investigate the physical and mechanical properties of composites comprised of unsaturated polyester resin (UPR) and recycled polyethylene terephthalate (PET) with 10% to 40% volume of bamboo fibre (BF)
Recycled polyethylene terephthalate depolymerization with excess PG yielded UPR-BF composites with BF (10%–40%), which were effectively developed. e degradation of UPR was discovered to have two separate stages. e first was attributed to the breaking of RPI bonds and the second to unrestrained continuous chains (TGA-DTG analysis). ough hydrophilic, BF had a lower density than its polymeric matrix, and the composites’ water absorption ranged from 0.7% to 2.81%
A loss in mechanical qualities such as hardness and toughness might be due to random dispersion and aggregates of BBF as well as the lack of reinforcement provided by the mixture of stalks, husks, leaves, and bamboo
Summary
We investigate the physical and mechanical properties of composites comprised of unsaturated polyester resin (UPR) and recycled polyethylene terephthalate (PET) with 10% to 40% volume of bamboo fibre (BF). Polymeric composites might benefit from employing this waste since it includes cellulose, hemicelluloses, lignins, pectins, and waxes, which can be used to strengthen polymeric fibres [2, 3]. Ammonolysis, glycation, and carboys, the type of glycol used in the PET depolymerization technique, all directly impact the physical and mechanical qualities of UPR. Composite materials made from UPR and natural fibres such pineapple leaves, coconuts, and sugarcane bagasse were tested for their mechanical and physical qualities. An unsaturated polyester resin generated from polyethylene terephthalate garbage by glycolysis and bleaching was investigated for its physical and mechanical properties in this research endeavour, together with all of its components (stalk/husk/ leaf/cob) [15, 16]
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