How to distinguish glass and plastic?

Update:26-09-2020
Summary:

There is a big difference between glass and plastic, in […]

There is a big difference between glass and plastic, including:

[Glass du] is formed by fusing silicon dioxide and other chemical substances together (the main production materials are: soda ash, limestone, and quartz). A continuous network structure is formed during melting, and the viscosity gradually increases during cooling and hardens to crystallize the non-metallic silicate material.

The chemical composition of ordinary glass is Na2O·CaO·6SiO2, and the main component is silicon dioxide, which is an amorphous solid with an irregular structure. It is widely used in buildings to separate wind and light. It is a mixture. There are also colored glass mixed with certain metal oxides or salts to show color, and tempered glass made by physical or chemical methods. Sometimes some transparent plastics (such as polymethyl methacrylate) are also called plexiglass.

[Plastic] is a polymer compound (macromolecules), commonly known as plastics or resins, which are polymerized by addition polymerization or polycondensation with monomers as raw materials. The composition and shape can be changed freely. It is composed of synthetic resin and It is composed of fillers, plasticizers, stabilizers, lubricants, pigments and other additives.

 

The main component of plastic is resin. The term resin was originally named for the lipids secreted by animals and plants, such as rosin, shellac, etc. Resin refers to polymer compounds that have not been mixed with various additives. The resin accounts for about 40% to 100% of the total weight of the 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 no or little additives, such as organic glass and polystyrene.

The so-called plastic is actually a kind of synthetic resin. Its shape is similar to the pine resin in natural resin. It is artificially synthesized by chemical means and is called plastic.

Feel different, glass is cool, plastic is warm.

The hardness is different, and the plastic has high hardness and no scratches; the plastic is slightly soft, and most plastics can be scratched with keys.

Burning, glass cannot burn, and the glass part is combustible. Even if it cannot burn, it may become soft, deformed or black.

Heat conduction, glass conducts heat quickly, and most plastics do not conduct heat.