What is the Difference Between PP and PPCP

Polypropylene (PP) and polypropylene copolymer (PPCP) are two commonly used thermoplastic materials in various industries. Understanding the difference between PP and PPCP is essential for addressing specific material requirements and challenges effectively.

What is the difference between PP and PPCP? PP is a homopolymer, whereas PPCP is a copolymer.

Key Areas Covered

1. What is PP  
      – Definition, Features, Applications
2. What is PPCP
      – Definition, Features, Applications 
3. Similarities Between PP and PPCP
      – Outline of Common Features
4. Difference Between PP and PPCP
      – Comparison of Key Differences
5. FAQ: PP and PPCP
      – Frequently Asked Questions

Key Terms

PP,  PPCP, Polypropylene, Polypropylene Copolymer

Difference Between PP and PPCP - Comparison Summary

What is PP

Polypropylene (PP) is a versatile polymer known for its wide range of applications stemming from its unique chemical structure and properties. Chemically, PP belongs to the polyolefin family, characterized by the presence of carbon-carbon double bonds in their monomeric units. PP is synthesized through the polymerization of propylene monomers, typically using Ziegler-Natta or metallocene catalysts, which control the polymerization process and the resulting properties of the polymer.

At the molecular level, PP consists of long chains of propylene monomers linked together by strong covalent bonds. The absence of any polar groups along the polymer chain contributes to its hydrophobic nature, making PP resistant to moisture and many chemical solvents. This property makes it an excellent material for various applications where resistance to chemical degradation is crucial, such as in chemical storage tanks, automotive components, and medical devices.

One of the key features of PP is its excellent mechanical properties, including high stiffness, toughness, and fatigue resistance. These attributes make PP suitable for use in engineering applications, such as in the manufacturing of pipes, ropes, and packaging materials. Additionally, PP exhibits good thermal stability, allowing it to withstand high temperatures without undergoing significant degradation. This property makes it suitable for applications requiring heat resistance, such as in microwaveable food containers and automotive components under the hood.

Polypropylene (PP)

Furthermore, PP is highly recyclable, contributing to its sustainability and environmental friendliness. Through various recycling processes, PP can be reprocessed and used in the production of new materials, reducing the reliance on virgin polymer production and minimizing waste.

What is PPCP

PPCP, or polypropylene copolymer, is a thermoplastic polymer known for its exceptional properties and wide-ranging applications across various industries. Composed of propylene monomers, PPCP is synthesized through copolymerization, wherein other monomers like ethylene or butylene are incorporated to modify its characteristics.

One of the key advantages of PPCP lies in its remarkable durability and resistance to chemical corrosion, making it an ideal material for manufacturing components exposed to harsh environments. Its high melting point and stiffness contribute to its suitability for applications requiring structural integrity and stability, such as automotive parts, industrial containers, and piping systems.

Moreover, PPCP exhibits excellent electrical insulation properties, rendering it indispensable in the electrical and electronics sectors for the production of insulating components and housings for devices. Its ability to withstand high temperatures without deforming or degrading further enhances its appeal in these applications.

Additionally, PPCP is renowned for its lightweight nature, facilitating its use in products where weight reduction is crucial, such as in packaging materials, sports equipment, and consumer goods. Its moldability and ease of processing further broaden its utility, allowing for intricate designs and customization in product manufacturing.

From household items like food containers and furniture to medical devices and construction materials, PPCP’s versatility knows no bounds. Its affordability compared to other engineering plastics also contributes to its widespread adoption in various sectors. However, like any material, PPCP has its limitations, including susceptibility to UV degradation and poor resistance to certain solvents.

Similarities Between PP and PPCP

  1. PP and PPCP are types of polymers derived from propylene monomers.
  2. Both possess similar physical properties, such as high chemical resistance, stiffness, and heat resistance, making them suitable for various applications, including packaging, automotive parts, and medical devices.

Difference Between PP and PPCP


PP is a homopolymer, meaning it consists of only propylene monomers, while PPCP is a copolymer containing propylene and other comonomers in its structure.


PP exhibits high stiffness, good chemical resistance, and excellent heat resistance, while PPCP often possesses enhanced impact resistance, flexibility, and transparency compared to pure PP due to the presence of other monomers in the polymer chain.


While PP is commonly used in a wide range of applications such as packaging, textiles, and automotive parts, PPCP is often preferred for applications requiring enhanced properties like impact resistance or flexibility, such as in medical devices or consumer goods.


In conclusion, the difference between PP and PPCP lies in their structural composition, with PP being a homopolymer and PPCP a copolymer. While both share similarities in physical properties and applications, such as high chemical resistance and suitability for packaging, automotive parts, and medical devices, PPCP offers enhanced characteristics due to the incorporation of comonomers.


1. What are the 4 types of PP?

Polypropylene has four main types: homopolymer, random copolymer, block copolymer, and impact copolymer. Homopolymers consist of pure propylene monomers. Random copolymers incorporate other monomers alongside propylene for improved flexibility and impact resistance. Block copolymers feature distinct blocks of propylene and other monomers, providing unique properties tailored to specific applications. Impact copolymers blend propylene with other monomers to enhance toughness and durability.

2. What is the difference between PPCP and HDPE?

PPCP is a copolymer derived from propylene monomers with modified properties, HDPE is a homopolymer composed solely of ethylene monomers, offering high strength, stiffness, and chemical resistance. PP also has a lower density than HDPE.

3. What is PPCP plastic used for?

Polypropylene copolymers (PPCP) find application in a wide range of industries and products, including automotive components, packaging materials, medical devices, household items, and more.

4. What are the two types of PP?

Homopolymers and copolymers are the two main types of polypropylene available in the market. Homopolymers consist solely of propylene monomers, resulting in a polymer with uniform properties, while copolymers incorporate additional monomers alongside propylene.

5. How is polypropylene copolymer made?

Polypropylene copolymer is made by polymerizing propylene monomers with other comonomers, such as ethylene or butene. This process results in a copolymer with modified properties compared to homopolymer polypropylene.


1. “Polypropylene.” Wikipedia. Wikipedia Foundation. 

Image Courtesy:

1. “Polypropylene” By NEUROtiker – Own work (Public Domain) via Commons Wikimedia

About the Author: Hasini A

Hasini is a graduate of Applied Science with a strong background in forestry, environmental science, chemistry, and management science. She is an amateur photographer with a keen interest in exploring the wonders of nature and science.

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