Abstract
The effect of unmodified and azide-modified short poly(ethylene terephthalate) (PET) and polyamide 66 (PA) fibres on the mechanical properties of thermoplastic composites based on low density (LDPE) and high density polyethylene (HDPE) matrices was investigated. The results have shown that both organic fibres are suitable reinforcements for LDPE and HDPE matrices. The weakest the matrix the strongest is the reinforcing effect of the fibres, so, the reinforcing effect of the fibres is more sensible in the LDPE matrix, p-(Azidosulfonyl)benzoyl azide is an adequate coupling agent for both fibres, especially for PET fibres. A better adhesion at the fibre/matrix interface of the composites has been observed by scanning electron microscopy, mainly in the PET-filled LDPE.
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