What is hydroxyl-terminated polybutadiene used for?

A series of high-performance hydroxyl-terminated polybutadiene liquid resins* (series A resins) is used worldwide in adhesives, sealants, and electrical applications due to their low glass-transition (Tg) temperatures (-75°C), hydrophobicity, acid-base resistance, and excellent dielectric properties.

What is HTPB made of?

Hydroxyl-terminated polybutadiene (HTPB) is an oligomer of butadiene terminated at each end with a hydroxyl functional group. It reacts with isocyanates to form polyurethane polymers.

Is polybutadiene a natural polymer?

Polybutadiene [butadiene rubber BR] is a synthetic rubber. Polybutadiene rubber is a polymer formed from the polymerization of the monomer 1,3-butadiene. Polybutadiene has a high resistance to wear and is used especially in the manufacture of tires, which consumes about 70% of the production.

What is the best solid rocket fuel?

The most common fuel in solid fuel rockets is aluminum. In order to make the aluminum burn, these solid fuel rockets use ammonium perchlorate as the oxidizer, or to make the aluminum burn. In order to work together, the aluminum and the ammonium perchlorate are held together by another compound called a binder.

What is HTPB fuel?

HTPB-based fuels mechanical properties HTPB is a polymer widely used in propulsion both for solid propellants and hybrid fuels. This is due to the HTPB ease of manufacturing and capacity of providing good mechanical properties also to highly loaded grains.

Is polybutadiene crystalline or amorphous?

crystalline
With the aid of anionic polymerization catalysts, 1,2-polybutadiene of high molecular weight has been synthesized. It is a crystalline material with a melting point above 150°C.

What are the property of polybutadiene?

Polybutadiene has excellent abrasion resistance (good tread wear), low hysteresis loss, high elasticity, and low rolling resistance due to its low glass transition temperature (Tg), typically <−90 °C.

What is hydroxyl terminal polybutadiene?

Hydroxyl-terminated polybutadiene. Hydroxyl-terminated polybutadiene (HTPB) is an oligomer of butadiene terminated at each end with a hydroxyl functional group. It reacts with isocyanates to form polyurethane polymers. HTPB is a translucent liquid with a color similar to wax paper and a viscosity similar to corn syrup.

What is a hydroxyl-terminated polybutadiene resin?

These hydroxyl-terminated polybutadiene (HTPB) resins are characterized by low volatiles content, low glass transition temperatures, excellent hydrophobicity and a highly reactive functionality.

What happens when HTPB reacts with isocyanates?

It reacts with isocyanates to form polyurethane polymers. HTPB is a translucent liquid with a color similar to wax paper and a viscosity similar to corn syrup. The properties vary because HTPB is a mixture rather than a pure compound, and it is manufactured to meet customers’ specific requirements.

Can HTPB be cured with polyurethane?

HTPB is usually cured by an addition reaction with di- or poly- isocyanate compounds. Polyurethanes prepared from HTPB can be engineered for specific physical properties; polyurethanes may be highly elastic or tough and rigid.