Abstract
A recyclable material, that can be incinerated under safety conditions, for humans and environment, the polyvinyl chloride (PVC) is still a largely used polymer, as a compound, inclusively. The PVC -TPU compounds are of interest due to their attrition resistance, chemical resistance, resistance to migration in solvents and oils (low extractibility), high bending under negative temperatures, low densities and erosion, stability to high temperatures, easy processing into finite article, cost efficient. All these properties are superior to a flexible PVC (hot masticated). The paper presents a study on dependency of some usage properties of PVC - TPU compounds on compounds composition. The results of the modification study of PVC with TPU are that new compounds have: the density within the range 1.18 – 1.3 g/cm3 , erosion within the domain 107 – 142 mm3, number of bendings up to breaking at positive temperatures, over 500 000, number of bendings up to cracking at –8 0C, over 500 000 bendings. Keywords: polyvinil chloride, thermoplastic polyurethane, physical modification, abrasion, density