The Role Of Precipitated Barium Sulfate In Modified Plastics

General plastics usually refer to plastic materials with large output, wide range of uses, easy molding and economical price, such as polyethylene, polypropylene, phenolic and so on. Many products used in everyday life are made from these general-purpose plastics.

These general purpose plastics have the advantages of being easy to form and affordable, but at the same time they also have the disadvantages of being susceptible to aging and deformation, which may bring some inconvenience during use. But they can be improved by modifying and adding precipitated barium sulfate to meet the needs of practical applications. Precipitated barium sulfate has become one of the widely used materials for functional modification of plastic products due to its unique and excellent properties. It can improve the chemical corrosion resistance and high temperature resistance of plastic products, and improve the appearance of products.

1. Rigidity of modified plastics:

Under normal circumstances, the stiffness of plastics is relatively low, for example, the bending modulus of pure polypropylene (PP) is about 1000 megapascals (MPa), which is difficult to meet the application needs of some parts. However, when 30% talc powder is added to it, its bending modulus can reach more than 2000 MPa, so talc powder plays a significant role in increasing the stiffness.

2. Surface hardness of modified plastics:

Under normal circumstances, plastic has a low hardness and is easy to scratch on the surface, which will affect its appearance, thereby reducing its appearance and decoration. Compared with plastic, inorganic fillers usually have a higher hardness. Therefore, when adding inorganic fillers to plastics, the surface hardness of plastics can be significantly improved.

3. Molding process ability of modified plastics:

Fillers improve the process ability of plastics, such as barium sulfate, glass beads, etc., can improve the fluidity of the resin, and then improve the process ability of modified plastic molding.

4. Progress intensity:

The tensile strength of general purpose plastics is usually low, but when the appropriate amount of inorganic fillers is added, the tensile strength and bending strength of plastics can be significantly improved, thus improving the performance of plastics in engineering applications.

5. Giving plastics specific functions can increase the added value of plastics:

Some fillers can give plastic specific functions, for example, adding talcum powder and calcium carbonate to polypropylene (PP) can improve its antistatic properties and printing function; Adding insulating glass beads to plastic can improve its thermal insulation performance. Adding metal particles to plastics can improve their thermal and electrical conductivity.

6. Precipitated Barium Sulphate:

①The appearance of Precipitated Barium Sulphate is white amorphous powder, the relative density is 4.50(15 ℃), and the melting point is 1 580 ℃. Because it has a high refractive index (1.63~1.65), it shows a whiter color and has a certain hiding power. It is almost insoluble in water, ethanol and acids, and soluble in hot sulfuric acid. It can be reduced to barium sulfide with carbon at high temperatures.

②It is an important basic chemical raw materials, the main use: used as paint, paint, ink, plastic, rubber and battery raw materials or fillers.

③Precipitated Barium Sulphate has been widely used in a wide range of fields with its unique and excellent properties, especially in the plastics industry has made remarkable achievements, has become one of the indispensable important functional materials.