Question

The density of polypropylene is

• A. 1.14 g/cc
• B. 1.38 g/cc
• C. 0.92 g/cc
• D. 1.52 g/cc

Hint:

Polypropylene is one of the lightest common polymers. It even floats on water (water's density is 1 g/cc). Memorizing relative densities (PP<Nylons<Polyester<Cotton/Rayon) is helpful.

Answer 1

The Correct Option is C

Step 1: Understanding Density: Density is mass per unit volume (typically g/cm³ or g/cc). Different polymers have different densities based on their chemical composition and how tightly their chains pack together.
Step 2: Polypropylene's Density: Polypropylene (PP) is a relatively low-density polymer. Its density is typically around 0.90 - 0.92 g/cc. This is significantly lower than other common polymers like polyester (around 1.38 g/cc) or nylon (around 1.14 g/cc). The low density is due to the hydrocarbon structure of PP and the way its chains arrange themselves.