What is the density of polyurethane rubber?

The apparent density of polyurethane rubber is between 165 and 200 kg·m-3, and the physical density is between them.

Polyurethane rubber is a series of elastomer materials containing more urethane groups on the polymer backbone, which is actually polyurethane.

Rubber, abbreviated as polyurethane rubber or urethane rubber or polyurethane elastomer. In addition to carbamate groups, polymer chains also contain ester groups, ether groups, urea groups, aryl groups and aliphatic chains. It is usually formed by the reaction of oligomeric polyols, polyisocyanates and chain extenders.

Polyurethane rubber, codenamed (UR), is made of polyester (or polyether) with a diisocyanamide compound.

aggregated. Its chemical structure is more complex than that of general elastic polymers, and in addition to the recurring urethane groups, the molecular chain often contains ester groups, ether groups, aromatic groups and other groups. Urethane rubber forms different structures and varieties with different raw materials and ratios, reaction modes and conditions.

The traditional classification of polyurethane elastomers is based on processing methods.

It is divided into cast polyurethane elastomers, compounded polyurethane elastomers and thermoplastic polyurethane elastomers. Due to the differences in the raw materials used, the synthesis and processing methods, and the purpose of application, reactive injectable polyurethane elastomers (RIMPU) and solution-dispersed polyurethane elastomers have emerged.

Extended Information: Properties of Polyurethane Rubber:

1. Excellent wear resistance: The wear resistance is the highest among all rubbers. Laboratory measurements have shown that the abrasion resistance of UR is natural rubber.

3 to 5 times, in practical applications often up to 10 times or so.

2. At Shaw.

High strength and elasticity in the hardness range from A60 to Shore A70.

3. Good cushioning and shock absorption. At room temperature, the UR damping element can absorb 10% of 20% of the vibration energy, and the higher the vibration frequency, the greater the energy absorption.

4. Good oil resistance and chemical resistance. UR with non-polar mineral oil.

The affinity is small, and it is almost impervious to erosion in fuel oil (such as kerosene, gasoline) and mechanical oil (such as hydraulic oil, engine oil, lubricating oil, etc.), which is much better than general rubber, and can be compared with nitrile rubber.

Comparable. The disadvantages are alcohols, esters, ketones and aromatics.

The swelling is larger.

5. Coefficient of friction.

Higher, generally above.

6. Good low temperature resistance, ozone resistance, radiation resistance, electrical insulation and bonding performance.

The density of polyurethane is: Polyurethane stands for polyurethane.

It is a general term for macromolecular compounds containing duplicate urethane groups on the main chain. It is made of organic diisocyanate or polyisocyanate and dihydroxy or polyhydroxy this type of decomposition polymerization.

Advantages of polyurethanePolyurethane waterproof coating.

It is one of the most common materials in our modern decoration construction, its environmental adaptability is excellent and in the air, water vapor contact will solidify, so as to form a tight protective film. Polyurethane waterproofing coatings are easy to apply, they can be applied directly on dry or wet surfaces, they are not affected by other factors, and they have excellent coagulation properties.

The internal polymer substance can easily penetrate into the gaps of the base surface, and the following performance is very strong. The coating film in polyurethane waterproof coatings has excellent tensile resistance and flexibility.

It is also very well known that even if the base layer cracks or expands, it will not have a great impact.

Natural rubber. The density is lighter, for, neoprene.

The density of EPDM rubber.

The density is. The denser the rubber, the heavier it becomes.

Rubber is a highly elastic polymer material with reversible deformation, which is elastic at room temperature, and can produce large deformation under the action of small external force, and can return to its original state after removing external force.

Rubber is a completely amorphous polymer with a glass transition temperature.

Low, the molecular weight is large, greater than hundreds of thousands.

Natural rubber. The density of isoprene rubber is, styrene-butadiene rubber.

The density of butadiene rubber is, and the density of butadiene rubber is. Rubber is divided into natural rubber and synthetic rubber according to raw materials. According to the form, it is divided into bulk raw rubber, latex, liquid rubber and powder rubber.

Rubber is an elastic polymer that can be obtained from the sap of some plants or artificially.

The word rubber** is derived from the Indian word cau-uchu, which means "tree of tears". Natural rubber is made from the clover rubber tree.

Latex that flows out when tapping.

It is prepared after solidification and drying. In 1770, the English chemist JPriestley discovered that rubber could be used to erase pencil handwriting, and the material for this purpose was called rubber, a term that is still used today.

The molecular chain dust circle of rubber can be cross-linked, and when the cross-linked rubber is deformed by external force, it has the ability to recover quickly, and has good physical and mechanical properties and chemical stability. Rubber is the basic raw material of the rubber industry, which is widely used in the manufacture of tires, hoses, tapes, cables and other rubber products. The clover tree provides the most commercial rubber.

When it is injured (e.g., the bark of the stem is cut), it secretes a large amount of sap containing rubber emulsion.

The density of natural rubber is, the density of isoprene rubber is, the density of styrene-butadiene rubber is, and the density of butadiene rubber is. Rubber is a polymer with elastic chain pants that can be obtained from the sap of some plants and can also be artificial. According to the different ways of making, rubber can be divided into two categories: synthetic rubber and natural rubber.

The density of natural rubber is, the density of isoprene rubber is, the density of styrene-butadiene rubber is, and the density of butadiene rubber is. Rubber is a resilient polymer that can be obtained from the sap of some plants and can also be artificial. According to the different ways of making, rubber can be divided into two categories: synthetic rubber and natural rubber.

Hello, Yuqin is happy to answer for you, what is the density of polyurethane? The density of polyurethane is not known, and the molecular weight is .

Polyurethane: The full name is polyurethane, which is a general term for macromolecular compounds containing repeating urethane groups on the main chain. It is made by the addition of organic diisocyanates or polyisocyanates with dihydroxy or polyhydroxy compounds.

Polyurethane material, which has a very wide range of uses, can replace rubber, plastic, nylon, etc., and is used in airports, hotels, building materials, automobile factories, coal mines, cement plants, high-end apartments, villas, landscaping, color stone art, parks, etc.