Polypropylene terephthalate (PPT) is a chemical compound, a modified terephthalate polymer, a polyester of propylene glycol and dimethyl terephthalate or terephthalic acid. Terephthalic acid is an aromatic carboxylic acid used in the production of polyester fibres.
The name describes the structure of the molecule:
- Polypropylene. This is a thermoplastic polymer commonly used in a variety of applications including packaging, textiles, and automotive components. It is known for its strength, durability, and flexibility.
- Terephthalate refers to the terephthalate monomer, which is a key component in the production of polymers like PET (polyethylene terephthalate). The terephthalate imparts strength and thermal stability to the polymer.
Raw Materials Used in Production.
- Terephthalic acid. A key raw material used to produce terephthalates.
- Propylene. A hydrocarbon used as the main component in forming polypropylene terephthalate.
Step-by-step Summary of Industrial Production Process.
- Preparation of Raw Materials. Terephthalic acid and propylene are prepared and purified.
- Polymerization. The terephthalic acid and propylene are polymerized under specific temperature and pressure conditions.
- Extrusion. The polymer is then extruded or molded into the desired shape.
- Cooling and Cutting. The extruded form is cooled and cut as needed.
Form and Color.
Polypropylene terephthalate typically comes in the form of white or translucent granules or powder, but can be colored if required for specific applications.
What it is used for and where
Cosmetics
Emulsion stabilizer. Emulsions are thermodynamically unstable. Emulsion stabilisers improve the formation and stability of single and double emulsions. It should be noted that in the structure-function relationship, molar mass plays an important role.
Skin conditioning agent - Miscellaneous. This ingredient has the task of modifying the condition of the skin when it is damaged or dry by reducing its flakiness and restoring its elasticity.
Safety.
Cases of allergy to terephthalic acid have been reported.
Commercial Applications:
Plastic Materials Industry. PPT is a polymer used in the production of fibers, films, and various plastic materials. It offers good chemical, mechanical, and thermal resistance, and is known for its abrasion resistance.
Common Applications. It can be used in applications such as packaging, textiles, automotive components, and other industrial products.
Recyclability. Like many other plastics, PPT can be recycled, although recycling infrastructures vary depending on the region.
