Influence of different woven geometry in poly(propylene) woven composites

The difference between the melting temperatures of poly(propylene)(PP) fibre and random poly(propylene-co-ethylene) (PPE) was exploited in order to establish processing conditions for an all PP composite. Under these conditions the matrix must be a liquid in order to ensure good wetting and impregnatin at the fibres, though the temperature must not be too high to avoid metling the fibres. The high chemical compatibility of the two components allowed creation of strong physico-chemical interactions, which favour strong interfacial adhesion. The static and dynamic mechanical properties and morphology of poly(propylene) woven fabric reinforced random PPE composites have been investigated with reference to the woven geometry that influenced the properties of the woven composites. Among the various cloth architectures that were used in the PP-PPE composites, the satin weave imparted overall excellent mechanical properties due to the weave parameters, such as high float length and fibre count, low interlace point and crimp angle,etc. Morphology of the composite has been investigated by macro photography and scanning electron microscopy. Images from scanning electron microscopy provided confirmation of the above results by displaying the consolidation and good fibre matrix wetting of the composites.