Steady state rheology of PP/PET blends

The objective of this study is to report the results of steady state viscoelastic properties in molten state investigated experimentally for PP/PET blends. They were prepared by the elastic extrusion method. The present paper discusses the influence of different types of PP, blending composition and effect of compatibilizer on steady state viscoelastic properties of PP/PET in molten stat

Combined effects of composite making, ageing and extrusion on property improvements in Al-7075-based alloy.

The present paper reports attempts made at enhancing the mechanical and wear resistance properties of a commonly used aluminium alloy, the 7075 alloy by different routes. They include: 1 making composites 2 ageing of the alloy and composite 3 extruding the alloy and composite to rods. A comparison in the properties including microstructure, hardness, mechanical and sliding wear resistant properties attained by the different routes have been attempted. It has been found that making composites drastically increases the hardness of the alloy and extruding them further increases the value marginally. Homogenisation increases the UTS for both the alloy and composite; however, extrusion does not show any positive effect especially for the composite. The presence of dispersoid particles changes the ductile behaviour of the alloy to a brittle failure for composites. This type of an analysis and study would help find the extent to which the properties in this alloy system can be improved and the additive enhancement if any vis-à-vis only ageing, extrusion or composite making