Homopol CopolymDensity / kgm-3: 905 905Tensile Strength / Mpa: 33 25Tensile Modulus / Gpa: 1.4 1.0Elongation at Break / %: 150 300Hardness / Rockwell "R" Scale: 90 80Polypropylene (PP) is a drocarbon polymer, expressed as CnH2n. PP, like polyethylene (see HDPE, L/LLDPE) and polybutene (PB), is a polyolefin or saturated polymer. Polypropylene is one of those most versatile polymers available with applications, both as a plastic and as a fibre, in virtually all of the plastics end-use markets.