Ask about polyethylene glycol What is the difference between polypropylene glycols and polyether pol

Answer. Hisman Tai Chemical Technology Co., Ltd. friendly A:

Propylene glycol, polypropylene glycol, and polyethylene glycol are all toxic products, and the amount of polyethylene glycol is higher than 1000 to really belong to products with low toxicity.

It doesn't matter if propylene glycol and polypropylene glycol are toxic products or edible.

Polyethylene glycol is more toxic than nephrophilis and other urinary tract diseases.

Ethylene glycol, propylene glycol, polyethylene glycol, and polypropylene glycol are all viscous substances.

Table**Ethylene glycol, dilute propylene glycol, polyethylene glycol and polypropylene glycol are all related to polymers, the more polymerization degrees, the more viscosity, and some polymer solids.

Buy 1,2-propanediol in winter or low temperature can obviously feel the viscosity at 15 viscosity in the temperature of 15 viscosity in order to visually measure the viscosity of the viscosity is too much.

For cosmetics, polyethylene glycol and propylene glycol are used for moisturizing, and the amount of polyethylene glycol is required to be used for moisturizing.

Some of PEG and PPG can be directly polymerized with isocyanates to form a polymer structure, which is a kind of polyoxyethylene ether or polyoxypropylene ether. As with other polyether polyols, they are only functional groups, and some inlays are added for the improved cryptoacacia chain. The default physical strength of the PU after direct polymerization with PEG and PPG is not possible.

Similarities:

Molecular chains to come. The end of the self-end is all hydroxyl end-capped and is used for the reaction with isocyanates.

Difference: Polymer polyol is made of general polyether polyol based polyether polymerization with acrylonitrile, styrene and other vinyl monomers and initiators. It is mainly used in the field of soft foam.

Polyether polyols are mainly made of propylene oxide as raw materials, and are grafted to polyols such as sucrose, glycerol, and diethylene glycol, and are mainly used in flexible foams, rigid foams, adhesives, etc.

Polyester polyols are mainly formed by the esterification reaction of dibasic acids and diols, with high hardness and good adhesion, and are mainly used for rigid foams, adhesives, elastomers, etc.

Skrey Polyurethane specializes in the production of polyester polyols.

Good evening, polyester polyols and polyether polyols have a big difference in performance for PU, if used.

are all the same isocyanate back.

Answer, due to its large molecular weight and polar blocks, polyester has a high cross-linking density, high hardness of the finished product, and high impact strength, to put it bluntly, it is a very authentic polyurethane. In polyether polyols, because polyether is a non-polar block, its elastic modulus is very good, which also leads to its easy to cause loose porous structure foaming, so polyether polyols are generally used to produce sponge foam and need good film-forming ink coatings can not be applied, please refer to it as appropriate. In terms of the appearance of the finished product, polyester polyol is a large piece of light yellow translucent colloid, and polyether polyol is a sofa sponge cushion with good elasticity.

Polyester and polyether polyols have great differences in performance because there are ester bonds and ether bonds in the structure.

The ester bond is rigid and recyclable, and it is not resistant to water.

Ether bonds are flexible and resistant to hydrolysis.

Therefore, in the synthetic polyurethane, polyester polyol is the main raw material, which has good strength but poor flexibility and hydrolysis resistance; Polyether is the main raw material, the product has poor strength, good flexibility, but good hydrolysis resistance.

The TPU synthesized by polyether has good hydrolysis resistance and low temperature resistance. Polyester synthetic TPU has good heat resistance, good oil resistance, and better physical properties than polyether, but the water resistance is very poor, and the low temperature resistance is not as good as that of polyether TPU.

and isocyanates to make polyurethanes, that's all I know.

Polyether polyol is mainly used for the preparation of soft, rigid and semi-rigid polyurethane foam, which is widely used in refrigerators, freezers, refrigerated trucks, heat insulation boards, pipe insulation, wall insulation, decorative coatings and other fields, and is also an important raw material for the preparation of combined polyether.

In addition, it can be used as a defoamer, lubricant, release agent, antistatic agent, dispersant, etc.

I don't know much about the chemical materials.

Summary. Not all other polyethers in primary form contain polyethylene glycol. Primary shape is a class of chemicals that refers to a polymer with highly controllable physical and chemical properties.

Among them, polyethylene glycol is a common primary shape, but not all primary shapes are made of polyethylene glycol. In fact, primary shapes can be made up of many different polymers, including polyvinyl alcohol, polypropylene alcohol, polycaprolactone, polyacrylic acid, and more. These polymers differ in chemical structure and therefore have different properties and applications.

For example, the primary shape formed by polyacrylic acid can be used to prepare biosensors and drug delivery systems, while the primary shape formed by polycaprolactone is suitable for the preparation of sustained-release drugs. Therefore, the composition of the primary shape depends on the specific chemical synthesis method and application needs, and does not necessarily include polyethylene glycol.

Can you tell us more about that?

Not all other polyethers in primary form contain polyethylene disilver spike alcohol. Primary shape is a class of chemicals that refers to a polymer with highly controllable physical and chemical properties. Among them, polyethylene glycol is a common primary shape, but not all primary shapes are made of polyethylene glycol.

In fact, primary shapes can be made up of many different polymers, including polyvinyl alcohol, polypropylene alcohol, polycaprolactone, polyacrylic acid, and more. These polymers differ in chemical structure and therefore have different properties and applications. For example, polyacrylic acid forms a primary shape that can be used to prepare biosensors and drug delivery systems, while polycaprolactone forms a primary shape that can be used to prepare sustained-release drugs.

Therefore, the composition of the primary shape depends on the specific chemical synthesis method and application needs, and does not necessarily include polyethylene glycol.