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The increases of kenaf fibres also reduces the overall thermal stability of the composites compared to the PET and epoxy resin composites. [...] The internal surface of the glass The water absorption of the composites was mould was sprayed with a release agent and the determined whereby each specimen, measuring resistance transparent plastic (mylar) was placed 30 x 30 x (3.2 ± 0.4) mm, was submerged in a at the bottom of the mould prior to pouring the container of purified water, at room temperature mix into the mould and the woven kenaf/P. [...] From of good adhesion between the matrix and the the figures, the composites with kenaf fibres fibres. [...] Generally, the water absorption of the composites was linear at the Figure 9 shows the degradation pattern for beginning, especially in the 10 wt% kenaf fibres (0 and 10 wt%) kenaf fibres composites and 10 and 8 wt% kenaf fibres composites as shown in wt% PTE composites at specific temperatures. [...] In the presence of water, these bonds interfaces relating that the addition of fibre allow the kenaf fibres composites to absorb a reduces the overall thermal stability of the relatively large amount of water.