When we talk about raw materials in the plastics industry, one of the first words that comes to mind is “polymer.” In this article, we explain in simple and practical terms what a polymer is, what types it includes, and why understanding these concepts is essential.
What is a polymer
Polymers are long chains of molecules made by repeating smaller units called monomers. These chains can be either natural or synthetic, and their properties vary depending on the type of monomer and the structure of the chain.
In simpler terms, a polymer is like a chain, where each link is called a monomer. The more monomers are linked together, the longer the polymer becomes, and its properties become more diverse.
Types of Polymers
This material has various classifications based on different criteria. One of these classifications is the division of polymers into natural and synthetic.
Natural and artificial
- Natural types: Materials such as rubber, starch, cellulose, and proteins found in nature.
- Synthetic Types: Materials made in a laboratory or factory, such as polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC).
We primarily focus on synthetic types in the compounding industry due to their high engineerability and feature adjustability.
Thermoplastics and thermosets
Another important classification of polymers is their division into two types: thermoplastics and thermosets.
- Thermoplastics soften with heat and can be reshaped. Polypropylene, polyethylene, and ABS are in this group.
- Thermosets, once molded, have their fixed structure and can no longer be melted or recycled. Epoxy resins are an example of this category.
Our work in the compounding industry is primarily with thermoplastics, as they have higher recyclability and flexibility.
What is the difference between a polymer and a compound?
Many people might wonder about the difference between these two substances. We will explain this in simple terms:
A polymer is a primary raw material, such as raw polypropylene or polyethylene granules.
A compound is a combination of a polymer with additives, reinforcements, pigments, and property enhancers.
We purchase raw polymer from the manufacturer and, through the compounding process, transform it into a product that is ready for use in various industries, ranging from automotive parts to home appliances, packaging, medical equipment, and even the construction industry.
For further reading on compounds, please refer to this article.
Why is understanding polymers important for compound buyers?
When we want to select the right compound for a specific application, we need to understand the properties of the base polymer well. For example:
If high chemical resistance is required, we should go for polyethylene or PVDF.
If thermal resistance is important, polycarbonate or PA are suitable options.
For parts requiring flexibility, TPE would be a smart choice.
A proper understanding of polymers helps us make smarter decisions in selecting the desired compound and producing a higher-quality final product.
Conclusion
In this article, we have tried to provide a comprehensive definition of polymer and explain its difference with compound. Understanding these concepts is not only essential for raw material buyers but also helps in making better decisions when purchasing raw materials.
If you are looking for advice on buying the best compound, we are honored to be in touch with Shamisa Tejarat Company. Our experts with years of experience are with you and will guide you as you wish.
Contact us: 09001630302
Send us an email: shamatejarat@gmail.com
Visit our website: https://shamatejarat.com/