Plastic Has Good Resistance To Chemicals Such As Acids And Alkalis
Plastic products are a general term for household and industrial supplies that are processed with plastic as the main raw material. Including products of all processes, such as plastic injection, plastic, etc. Plastic is a type of synthetic polymer material with plasticity.
It forms three indispensable synthetic materials in daily life with synthetic rubber and synthetic fibers. Specifically, plastic is a material with natural or synthetic resin as the main component and various additives added, which can be molded into a certain shape under a certain temperature and pressure, and the shape is maintained at normal temperature.
Plastic is a lighter material with a relative density distribution between 0.90 and 2.2. Obviously, can plastic float on the water? Especially foamed plastics, because of micropores, have a lighter texture and a relative density of only 0.01. This property makes plastics useful in the production of products that require reduced weight.
Most plastics have good resistance to chemicals such as acids and alkalis. In particular, polytetrafluoroethylene (F4), commonly known as plastic king, has even better chemical stability than gold, and it will not spoil if it is boiled in "aqua regia" for more than ten hours. Because F4 has excellent chemical stability, it is an ideal corrosion-resistant material. Such as F4 can be used as a material for transporting corrosive and viscous liquid pipes.
Ordinary plastic is a poor conductor of electricity, and its surface resistance and volume resistance are very large, which can be expressed by numbers up to 109 to 1018 ohms. The breakdown voltage is large, and the tangent of the dielectric loss angle is small. Therefore, plastics have a wide range of applications in the electronics and machinery industries. Such as plastic insulated control cables.
Some plastics are as hard as stone and steel, while others are as soft as paper and leather. From the perspective of mechanical properties such as the hardness, tensile strength, elongation, and impact strength of plastics, they have a wide range of distribution and have a lot of options. Because plastic has a small specific gravity and high strength, it has a high specific strength. Compared with other materials, plastic also has obvious shortcomings, such as easy to burn, less rigid than metal, poor aging resistance, heat resistance and so on.