Polyethylene is insoluble in water and has little water absorption. Even for some chemical solvents, such as toluene and acetic acid, they are only slightly soluble above 70℃. However, granular polyethylene can be melted or solidified with the change of temperature between 15℃ and 40℃, and it absorbs heat when it is heated. When the temperature drops, it solidifies and gives off heat. Because it absorbs less water, is not easy to get wet, and has insulating properties, it is a good building material.
PVC is actually a vinyl polymer, and its material is an amorphous material. In practical use, stabilizers, lubricants, processing AIDS, pigments, impact agents and other additives are often added to PVC materials. It is nonflammable, high strength, weatherability and excellent geometric stability. PVC has strong resistance to oxidants, reductants and strong acids. However, it can be corroded by concentrated oxidizing acids such as concentrated sulfuric acid and concentrated nitric acid, and is not suitable for contact with aromatic hydrocarbons and chlorinated hydrocarbons. In addition, the word human vs computer in the game is abbreviated as PVC, and PVC humanoid is often abbreviated as PVC.
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