What is Polypropylene Resin? Properties, Function, History, Types, Advantages & Disadvantages

by | Resin

A thermoplastic polymer is a polypropylene (PP). It has a wide range of applications. It is produced from the monomer propylene through chain-growth polymerization.

It performs similar duties to polyethylene. However, it is more heat resistant and harder. It is made of white, strong material. The second-most versatile and effective electrical insulator is polypropylene.

Learn about polypropylene resin, including its definition, characteristics, uses, history, types, benefits, drawbacks, and distinction from epoxy resin.

What is Polypropylene Resin? 

Polypropylene is a category of thermoplastic polymer resin. In short, it is a very beneficial type of application with many commercial and industrial applications.

The primary benefit of polypropylene is also the primary factor in manufacturers’ preference for it over other types of plastic across all industries. Usually, it can withstand higher temperatures. It is used to make prescription bottles, pots, boxes, margarine containers, and bottles. Most plastic bottle caps are made of PP.

Properties of Polypropylene Resin

Semi-rigid, translucent, good chemical resistance, toughness, good fatigue resistance, and other characteristics of polypropylene are just a few. The mechanical and thermal resistance of the methyl groups is better. Despite a decrease in chemical resistance. Several variables, particularly molecular weight, and molecular weight distribution affect polypropylene’s properties.

In general, polypropylene is resilient and flexible, particularly when copolymerized with ethylene. As a result, polypropylene can be used as an engineering plastic and is in direct competition with substances like acrylonitrile butadiene. Polypropylene is fairly affordable. Task resistance is good for polypropylene.

The melting point of polypropylene can vary, so the highest temperature on a differential scanning calorimetry chart is used to determine the melting point. Incredibly high thermal expansion occurs with PP.

To fats, polypropylene is resistant. At room temperature, it is resistant to almost all organic solvents. Isotactic polypropylene dominates the market.

The Function of Polypropylene Resin 

  • Polypropylene is used in household and industrial applications. Its unique properties and ability to adapt to different fabrication techniques make it stand out as a crucial material for a wide range of uses. 
  • Polypropylene has the ability to function as plastic material as well as a fiber.
  • Polypropylene has a unique capability to be manufactured through different methods and in different applications. Its development has been sustained over the years
  • One of the most intriguing examples is how polypropylene can be CNC-machined to include a living hinge for the development of prototype living hinges.
  • A material with a low fluxing point and high malleability is polypropylene.

History of Polypropylene Resin  

In 1954, isotactic polypropylene was created. It was created by Italian chemists Giulio Natta and Paolo Chini in collaboration with the Montecatini Company, now known as Montedison SpA. They used catalysts of the kind Karl Ziegler, a German chemist, recently developed for the synthesis of polyethylene.

Polypropylene Resin Types

There are 2 major types of this resin available: 

  • Homopolymers and 
  • Copolymers. 
  1. Copolymers  

Two additional divisions of the copolymers are block copolymers and random copolymers. Each performs differently in various applications. Polypropylene is frequently referred to as the “steel” of the plastics industry because of the many ways in which it can be modified or altered to best serve a specific purpose.

  1. Homopolymer  

One kind is polypropylene homopolymer. This is the polypropylene material in its natural state. Unplanned copolymers of polypropylene contain co-monomer units as opposed to blocking copolymers. They are chosen for applications where a more flexible, clearer product is desired and range from 1% to 7% ethylene. They are arranged in erratic or random ways.

Polypropylene Resin Advantages 

Despite its defect, polypropylene is a great material overall. Some plastics, like those that contain BPA harm bodies or the world we live in. Polypropylene, a complex plastic, is normally considered safe for humans.

Polypropylene Resin Disadvantages 

Polypropylene has an excessive thermal expansion coefficient which limits its high-temperature applications.

Polypropylene has deficient resistance to chlorinated solvents and aromatics. Polypropylene is known to be difficult to paint as it has poor bonding things. Polypropylene is highly burnable. Polypropylene is vulnerable to oxidation. 

Where to Buy Polypropylene Resin?

Check out the best polypropylene resin reviews to find the perfect one for yourself. And Visit the resin store to buy resins online at a cheap price.


Polypropylene is widely accessible and reasonably priced. Due to its semi-was nature, polypropylene has high flexural power. The plane of polypropylene is fairly slick.

Entrapping moisture is very difficult to penetrate polypropylene. Polypropylene can withstand a variety of bases and acids well chemically.

Polypropylene has good impact strength as well as strength and abrasion resistance. An effective electrical insulator is polypropylene.

I think you have a good understanding of polypropylene resin’s definition, properties, use, history, types, benefits, and drawbacks, as well as how it differs from epoxy resin.

Read the pillar article to learn about all types of Resin Definitions, History, Types, Functions, Advantages, Disadvantages, and FAQ.


  1. www.polymeracademy.com
  2. www.wikipedia.org
  3. www.creativemechanisms.com

Posts You May Like

Artificial and Natural Resins Examples You Must Know!

Artificial and Natural Resins Examples You Must Know!

You may have many questions about natural Resin Examples in your mind, Do you know what natural resin is? In contrast to synthetic resin, which is produced chemically, natural resin is a resin product that comes from a plant. Human cultures have utilized natural...

The 8 Best Polymer Resin Products Review

The 8 Best Polymer Resin Products Review

A thick, resilient, glossy coating is produced by the polymer resin, meaning a transparent liquid plastic product. It becomes fade- and water-resistant after becoming hardened. This kind of resin is frequently used in many different arts and crafts when the creator...