What are the raw materials of plastics and where do the raw materials of plastics come from

Plastic is a class of polymer organic compounds, which is a general term for thermoplastic forming materials such as filling, plasticizing, and coloring, and belongs to a class of polymer organic polymers.

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Plastic raw materials are a general term, we divide plastic raw materials into four categories according to the use of plastic raw materials and some differences in other aspects: general plastic raw materials, thermoplastic elastomer raw materials, engineering plastic raw materials, and thermosetting plastic raw materials.

Plastic raw materials are very versatile, and many common daily necessities in life are made of plastic, such as table lamp shades, instrument shells and some children's toys. The main raw materials of plastics are synthetic resins, which are mainly coal tar products and calcium carbide in the early days, and now mainly oil and natural gas products, such as ethylene, propylene, benzene, formaldehyde and urea.

The appropriate macromolecular components in oil and gas are first proposed, first cracked into monomers, and then polymerized into polymers to become plastics. For example, polypropylene (PP) is polymerized from propylene monomer, and propylene monomer is refined from petroleum, and it should be said that almost all monomers are extracted from petroleum. Extracted from petroleum, the others are polyethylene, ethylene, which can be formed after polyethylene.

Different plastics are formed under different conditions as needed.

Currently, resins are polymers that have not been mixed with various additives. Resin accounts for about 40 100 of the total weight of plastic. The basic properties of plastics are mainly determined by the nature of the resin, but additives also play an important role.

Some plastics are basically composed of synthetic resins with little or no additives, such as plexiglass, polystyrene, etc. The so-called plastic is actually a kind of synthetic resin, and its shape is similar to that of pine resin in natural resins, but it is called plastic because it is synthesized by chemical force.

As we all know, plastic is more afraid of heat, when the temperature is too high, the plastic may melt, but there is a special plastic that can work at high temperatures, he is the raw material of polyphenylene ether plastic, this plastic can be used to make some gears that can work at a fairly high temperature and some machine parts, this is a special plastic. The main raw materials of plastic bags are polyethylene and polyvinyl chloride, both of which are non-degradable; The main raw materials for the production of plastic bags are polystyrene, polypropylene and other polymer compounds, after the waste plastic packaging enters the environment, because it is difficult to degrade, it will cause long-term, deep-seated ecological and environmental problems. However, it should be noted that some waste plastic packaging mixed with the soil will affect the absorption of nutrients and water by crops, which will lead to a reduction in crop yield; Waste plastic packaging discarded on land or in water bodies, swallowed by animals as food, can lead to the death of animals.

The raw materials of plastics are mainly refined from oils. The raw materials of plastics are many kinds of chemical extracts, most of which can be collectively referred to as "polymers", and after these polymers are refined, they can be processed with synthetic resins and other chemical agents to produce plastics.

The raw materials of plastics are mainly derived from oil extracts, most of which can be collectively referred to as "polymers", which are highly malleable chemicals.

Another main raw material of plastic is resin, resin can be naturally extracted or synthesized, resin occupies a large proportion of plastic raw materials, and the quality of the final plastic almost depends on the quality of the resin.

Petroleum: Petroleum is one of the most commonly used raw materials for the manufacture of plastics, which can be extracted from monomers such as ethylene and propylene through the refining process, and then formed polymers through polymerization reactions. 2.

Natural gas: Natural gas can also be used to provide monomers such as ethylene and propylene, which is another commonly used plastic raw material. 3.

Coal: Aromatic compounds such as benzene and toluene extracted from coal can also be used as raw materials for plastics. 4.

Plants: Plants contain biodegradable materials such as starch and cellulose, which can be used to make biodegradable plastics. 5.

Recycled plastic: After the waste plastic products are processed and processed, they can be reused as recycled plastics. It is important to note that the dust collection capacity of the raw materials used in different types of plastics will vary.

At the same time, various auxiliary materials such as additives and fillers are added in actual production to improve their properties and processability.

1. Plastic raw material is a kind of polymer, also known as polymer or macromolecule, and is also commonly known as plastic or resin. The so-called plastic raw material is actually a type of synthetic resin, and the shape is similar to that of natural resin, but it is synthesized by chemical force, so it is called plastic.

2. This polymer is composed of many small molecules with small and simple structures, which are combined by covalent bonds. There are many types of polymers, and if they are generally classified by the change in heat, they can be divided into two categories.

1. General plastics (polyethylene, polypropylene, polyvinyl chloride, polystyrene, ABS, etc.);

2. Thermosetting plastics (phenolic, epoxy resin, unsaturated polyester, polyurethane, silicone, amino resin, etc.);

3. Thermoplastic engineering plastics (polyamide, polycarbonate, polyoxymethylene, PET, PBT and other plastics).