What Is The Difference Between PP And Plastic?

The difference between PP and plastic is as follows:

1. Different types：PP refers to the polymer polypropylene; plastics are polymer compounds polymerized through addition polymerization or condensation polymerization, and there are more types.
2. The ingredients are different：PP is a thermoplastic synthetic resin with excellent performance. It is a colorless, semi-transparent thermoplastic lightweight general-purpose plastic; the main component of plastic is resin.
3. Performance is different：PP has chemical resistance, heat resistance, electrical insulation, high-strength mechanical properties and good high wear resistance and processing properties; plastics are mainly used in rosin, shellac, organic glass, polystyrene, etc.

 What are the properties of PP?

• Physical properties: non-toxic, odorless, tasteless, milky white and highly crystalline with a density of only 0.9-0.91g/cm3 and good stability to water.

• Thermal properties: It has good heat resistance. Its products can be sterilized at temperatures above 100°C and will not deform at 150°C without external force. The embrittlement temperature is -35°C. Embrittlement will occur below -35°C, and its cold resistance is not as good as polyethylene.

• Chemical stability: The chemical stability is very good. In addition to being corroded by concentrated sulfuric acid and concentrated nitric acid, it is relatively stable to various other chemical reagents. However, low molecular weight aliphatic hydrocarbons, aromatic hydrocarbons and chlorinated hydrocarbons can cause poly Propylene softens and swells, and its chemical stability increases with the increase in crystallinity. Therefore, polypropylene is suitable for making various chemical pipelines and accessories, and has good anti-corrosion effects.

• Electrical properties: It has a high dielectric coefficient, and as the temperature rises, it can be used to make heated electrical insulation products. Its breakdown voltage is also very high, making it suitable for use as electrical accessories, etc. It has good voltage resistance and arc resistance, but has high static electricity and is prone to aging when in contact with copper.

What is Plastic ?

• Plastic is a polymer whose main component is synthetic resin. In addition, there are also additives with certain specific uses that can be added as needed, such as plasticizers that can improve plasticity, antioxidants that prevent plastic aging, etc.
• Although the relative molecular mass of the polymer is very large, its composition is not complicated and its structure also has certain rules. They are made through the polymerization of small molecules, such as polyethylene plastics, which are made from ethylene molecules.
• When polyethylene plastic is heated to a certain temperature range, it will begin to soften until it melts into a flowing liquid. The phenomenon of molten polyethylene plastic becoming solid again when cooled and melting back into liquid when heated is called thermoplasticity. Polyethylene, polyvinyl chloride, and polypropylene are all thermoplastics.