Differences and connections between glass, ice, clear plastic, sugar made glass, etc. 30

1。The difference is that the physical composition is different.

The main ingredient of glass is silica, and most glass products are generally made with stable substances to enhance chemical durability, or fluxing substances are added to reduce the melting temperature.

Ice is the solid state of water, and its composition is, of course, water (H20). Water in nature has three states: gaseous, solid and liquid. The liquid state is called water, the gaseous water is called water vapor, and the solid water is called ice.

The transparent plastics commonly used in the market are polymethyl methacrylate (commonly known as acrylic or plexiglass, code PMMA) and polycarbonate (code PC). Polyethylene terephthalate (code PET), transparent nylon. AS (acrylic-styrene copolymer), polysulfone (code PSF), etc., among which we are most exposed to PET three plastics.

The composition of sugar glass, that is, sugar. Carbohydrates are carbohydrate compounds, which are polyhydroxyaldehydes or polyhydroxy ketones, or compounds that can be hydrolyzed to form polyhydroxyaldehydes into polyhydroxy ketones.

Carbohydrates mainly contain three elements: C, H, and O, and since the ratio of H and O in most carbohydrate molecules is exactly 2:1, which is the same as the H2O molecule, its general formula can be written as Cx(H2O)Y, and carbohydrates are also named after this.

Example: glucose C6 (H2O)6, sucrose C12 (H2O)11

However, there are some substances that also conform to the above general formula, but are not carbohydrate compounds.

For example: lactate CH3CH(OH)COOH3(H2O)3

So it's not accurate to call sugars carbohydrates.

Sugar**: produced by the photosynthesis of green plants. For example, the most widely distributed glucose in nature is synthesized by the energy provided by the sun by plants using CO2 and H2O under the catalysis of chlorophyll.

2。The similarities are that they are all solid, and they are all transparent.

Clear glass is fragile, has high hardness and poor toughness. Not heat-resistant. It does not age and is easy to clean.

Transparent plastic has low hardness, good toughness, and is not easy to break. Heat-resistant but not heat-resistant, flammable. It is easy to age, and the surface is easily scratched.

The glass is inorganic, the special is plexiglass, and the transparent plastic is organic and soft.

Glass is silica and sand contains a lot of it, which is obtained by calcination. Plastics are organic materials that are obtained through the refining of petroleum. Glass:

Mirrors - mercury and various glasses are brushed on the back of the glass. Plastics: all kinds of plastic products, toys, plastic basins, etc.

Glass is an inorganic non-metallic material and is amorphous. Plastics are organic materials, and organic matter is characterized by the presence of carbon in the molecules.

In life, window glass and computer displays (including tablets, mobile phones, etc.) are made of glass; Plastics are more widely used, plastic buckets, computer shells, car interiors, plastic water cups, etc.

Plastic is plastic, glass is not.

The main raw material for glass is sand, and the main raw material for plastic is the residue of petroleum. Their nature determines the role. Glass is relatively hard and refractory, and is mainly used as windows.

Toxic substances are released when plastic is fusible and burned. Usually the Lock Cup is plastic. However, some plastic bottles cannot be placed with hot water, and they will drink toxic substances.

The characteristics of glass are transparency and high hardness; The characteristic of plastic is that it has a certain toughness.

The main component of glass is silicate, the main component of many jade agate is silicate, and the main component of plastic is polymer, which is essentially different.

The refractive index and light transmittance of different materials are different, and the light transmittance of glass is higher.

The transparency of glass refers to the two-way transparency of glass, that is, the glass is transparent from any direction; The light transmittance of glass means that light can be transmitted from one side of the glass to the other through chaotic diffuse transmission, but the unexpected scenery on the other side cannot be seen.

2. The role is different.

The transparency of glass not only introduces the light of nature into the people's buildings, but also leads people's eyes from indoor to outdoor, not only to create a bright light environment for people, but also to bring people visual transparency, the extension of space, the combination of inside and outside the building, the transparency of glass makes people have a feeling of being in the living room, but bathed in nature.

The light transmittance of glass has an excellent decorative effect, and the light transmittance of glass can make the light in the room soft, quiet and warm.

3. The scope of application is different.

Patterned glass decorates the doors and windows of the bathroom, which not only blocks the view of the outside world, but also beautifies the environment of the bathroom. It can be said that modern buildings are increasingly using the light transmission of glass. The transparency of glass is relatively small, and now it is used less and less.

Depending on the refractive index, the same range of light passes through a different range.

Of course, glass is good, plastic will decompose toxins, don't you know?

The composition of chemical oxides in glass (Na2O·CAO·6SIO2), the main component is silicon dioxide.

Plastics are synthetic polymer compounds. Synthetic resins are the most important components of plastics.

I want to figure out, the PP forum, a lot of PE film information, there are a lot of friends who do PE film and printing bags, many of them.

It is the front-line operator, who is responsible for the technology. There are many types of liquid made of PE particles, including low density, metallocene metallocene, linear type, etc.

The difference is huge.

Melt index, also known as melt index or MI Melt index, is an important index to characterize the machinability of materials in polymer processing, and is often used in industry to represent the relative value of melt viscosity: good fluidity, large MI; Poor liquidity, small MI.

The glass transition temperature, also known as TG, refers to the transition temperature of amorphous polymers (including the amorphous part of crystalline polymers) from the glass state to the highly elastic state or by the latter. It is the minimum temperature at which the amorphous polymer macromolecular segments move freely, but it is not the upper limit of the operating temperature of the product. For example, the operating temperature of rubber must be above the glass transition temperature, otherwise it loses its high elasticity.

You'd better be able to say what kind of plastic you're asking about. There are many types of plastics, especially modified plastics and engineering plastics. The focus is different.

Thermoplastics are generally called melting points, which are generally a temperature point; The temperature of the transition between the highly elastic state and the glass state of the thermosetting polymer material is the glass transition temperature, which is generally an interval.

Plastics also have hot melting crystallization temperature, cooling crystallization temperature, decomposition temperature, etc.

1. Weight:

A glass cup of the same size and thickness is much heavier than a plastic cup.

2. Listen to the sound by pressing hard and tapping:

The glass is very hard and can not be deformed in the slightest, and the percussion sound is sharp and pleasant, while the plastic is generally soft, there will be deformation, and the percussion sound is hoarse.

3. High temperature: glass is resistant to high temperature, it is okay when it encounters fire, and plastic will melt and burn when it encounters fire (destructive experiment).

The most direct is burning, the plastic will be discolored and smelly.