Forget about what you have known about the density of polypropylene, for a few minutes. And read this article, definitely it will add to your knowledge regarding polypropylene density. If you study chemistry in your high school or college, then you have heard of the name ‘polypropylene’ very often. Polypropylene is the polymer, in which poly means many. It is a thermoplastic addition polymer made from the combination of propylene monomers. The polymer, polypropylene, is used in multiple applications including packaging for consumer products, plastic parts for various industries including the automotive industry, and special devices like living hinges, and textiles. Instead of further discussion, let us know the density of polypropylene.

## What Is The Density Of Polypropylene?

The density of polypropylene is 0.905 g/cm3. You can also express the polypropylene’s density in other units. So, the density of polypropylene in kg/m3 is 855 kg/m3. The density of polypropylene in lb/in3 is 0.031 lb/in3, and the density of polypropylene g/cm3 is 0.86 g/cm3.

Do you know? Polypropylene is also written as PP, therefore, if you see the pp density, then don’t get confused, it is also the polypropylene density. The pp density g/mm3 is 0.00086 g/mm3. Like polypropylene, PVC is also a monomer and the PVC density kg/m3 is 1330 kg/m3. The PVC is denser than polypropylene. If you mix polyvinyl chloride with PVC and polypropylene together, then PVC gets settled down at the bottom and polypropylene spreads over it.

The density of polypropylene fibre is between 0.895 and 0.92 g/cm3 while the density of polypropylene glycol is 1.02 g/cm3. Similarly, the melt density of polypropylene is between 0.90 and 0.92 g/cm3.

Well, you have an idea about the polypropylene density in detail. Let us have a look over the polypropylene density definition.

## Definition Of Density Of Polypropylene

The density of polypropylene is defined as the mass or unit volume. And the average density of polypropylene is 0.905 g/cm3, which means 0.905 grams of mass get condemned in one cubic cm space.

Density depends upon the size of the molecules. When you increase the size of molecules then the density of it gets decreased. It is because the volume is directly proportional to the size but the density is inversely proportional to the volume. So, on increasing size volume gets increased and ultimately falls in density.

The definition of the polypropylene density also be written as,

The density of polypropylene = mass of polypropylene/volume of polypropylene g/cm3

In the symbolic form,

D = mv g/cm3

Where, d – the density of polypropylene,

v – the volume of polypropylene, and

m – the mass of polypropylene

Let us learn to calculate the polypropylene density.

## How To Calculate The Density Of Polypropylene?

To calculate the polypropylene density you need to know its formula and also some basic practical knowledge. You can gain this practical knowledge by following the given procedure.

- Take a piece of polypropylene material and measure its weight.
- Now, calculate its volume.
- If you selected an irregular shaped piece of polypropylene, then use the water displacement method to calculate its volume.
- In this method, you need to immerse the piece into water and then measure the volume of water.
- Now, you have both the values, mass and volume, just divide mass by volume you will get the polypropylene density.

Here is the example, which makes you more clear about the polypropylene density calculation.

A sure-shaped piece of polypropylene with the volume of 1000 cm3 is taken. It weighs about 905 gram. What will be its density?

By using the density formula as,

The density of polypropylene = mass of polypropylene/volume of polypropylene g/cm3

= 905/1000 = 0.905 g/cm3

Let’s find out the densities by visiting Denseme

## FAQ

### How Do You Find The Density Of Polypropylene?

Determine the density for the polymer blend by adding the mass fraction densities together. This is done with the formula 0.70 x 55.51 (polypropylene) + 0.30 x 57.38 (polyethylene) for an answer of 56.07 pounds per cubic foot for the blend.

### Does Polypropylene Float In Water?

Plastics that are less dense than water float in water. Most agricultural plastics—including greenhouse and tunnel covers, mulch films, bags from supplements, bale wrap and silage covers, pesticide containers, etc. — are primarily polyolefini plastics (polypropylene and the polyethylenes) that float in water.

### Is High Density Polyethylene Cheap?

It’s Cheap! HDPE not only has all of these great properties, but it is low cost as well, as it is so commonly available and used in many different industries.

### What Is The Specific Gravity Of Polypropylene?

Because polyethylene and polypropylene have specific gravities in the range 0.90–0.96, they will float, which must be considered when working in water (Koerner, 2012).

**Does Polypropylene Have High Density?**

Properties of polypropylene

For example, PP has the lowest density (i.e 0.90-0.92 g/cm3) of the resins used in packaging. – It is highly resistant to most alkalis and acid, organic solvents, degreasing agents and electrolytic attack.

## Conclusion

After reading this article you have collected deep knowledge regarding the polypropylene density. The polypropylene properties include semi-rigid, translucent, tough, good fatigue resistance, integral hinge property, good heat resistance, and good chemical resistance. Polypropylene is considered one of the best and safest plastics to use. It is FDA approved for food contact, so you will find polypropylene in food containers like those that hold yoghourt, butter products, cream, and cheese. Now, you have understood what is the density of polypropylene.