Production and Characterisation of Multifilament Yarns Made from Polypropylene Containing Small Amounts of Oxidised Polypropylene

Abstract

In the present work, oxidation of fibre grade polypropylene granules in the melt phase using oxygen gas has been performed. Then, virgin polypropylene granules were mixed with up to 10% by weight of oxidised granules and multifilament yarns from the blends were spun by a pilot-plant melt spinning machine. The characterisation of as-spun yarns was performed by FTIR and DSC analysis. Also the density, shrinkage and mechanical properties of the samples were evaluated. The results show that the as-spun blend fibre containing 10% by weight of oxidised polypropylene has the lowest crystallinity, density and melting temperature while it shows the highest shrinkage and mechanical property faults.