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[Chemical Knowledge]：Properties and Uses of PTMEG

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PTMEG (polytetrahydrofuran) is an important raw material for chemical production, which is widely used in many fields. This article will detail the nature and use of PTMEG.

1. the properties of PTMEG

PTMEG is a colorless and transparent liquid with high chemical and thermal stability. Its molecular structure contains ether bonds and hydrogen bonds, so that it has good solubility and polarity. PTMEG has low viscosity, good fluidity, and a high boiling point, so it can be used as a solvent and medium for many chemical reactions.

In addition, PTMEG also has excellent oxidation resistance, acid and alkali resistance, hydrolysis resistance and UV resistance, and can be used under many harsh environmental conditions.

2. The use of PTMEG

1. Polyurethane elastomer

PTMEG is one of the important raw materials for the production of polyurethane elastomer (PU). It reacts with diisocyanate (TDI, MDI, etc.) to generate polyurethane prepolymer, which can be further processed to obtain polyurethane elastomer. Polyurethane elastomers have excellent mechanical properties, wear resistance, impact resistance, oil resistance and chemical resistance, and are widely used in automobiles, construction, furniture, shoes and other fields.

2. Polyurethane fiber

PTMEG can also be used to produce polyurethane fibers, such as spandex. Spandex has a high degree of elasticity and can be used to make tights, elastic fabrics, etc.

3. Polymer modifier

PTMEG can be used as a polymer modifier to improve the toughness, impact resistance and processability of polymers. For example, adding PTMEG to polystyrene can improve its impact resistance and toughness.

4. Solvent and Medium

Since PTMEG has high chemical and thermal stability, it can be used as a solvent and medium for many chemical reactions. For example, PTMEG can be used as a solvent for the electrolyte for the production of lithium ion batteries.

In short, PTMEG, as an important raw material for chemical production, has been widely used in the fields of polyurethane elastomers, polyurethane fibers, polymer modifiers and solvents.

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