All Topics  
Hydroxyl-terminated polybutadiene

 

 
   Email Print
   Bookmark   Link
 

 

Hydroxyl-terminated polybutadiene
 
 
  Topics Hydroxyl-terminated polybutadiene Topic Home

Hydroxyl-terminated polybutadiene (HTPB) is a polymer of butadiene terminated at each end with a hydroxyl
Hydroxyl

Hydroxyl in chemistry stands for a molecule consisting of an oxygen atom and a hydrogen atom connected by a covalent bond. The neutral form is a hydroxyl Radical and the hydroxyl anion is called a hydroxide....
 functional group
Functional group

In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules....
. It belongs to a class of polymers
Polymer

A polymer is a large molecule composed of repeating structural units typically connected by covalent chemical bonds. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials with a variety of properties....
 known as polyol
Polyol

The name polyols refers to alcohols containing multiple hydroxyl groups. In two technological disciplines polyols have special meaning: food science and polymer chemistry....
s. It is used to react with a diisocyanate
Isocyanate

Isocyanate is the functional group of atoms ?N=C=O , not to be confused with the cyanate functional group which is arranged as ?O?C=N....
 to form a polyurethane
Polyurethane

A polyurethane, commonly abbreviated PU, is any polymer consisting of a chain of organic chemistry units joined by carbamate links. Polyurethane polymers are formed by reacting a monomer containing at least two isocyanate functional groups with another monomer containing at least two alcohol groups in the presence of a catalyst....
, a stable and easily stored synthetic material.

is a clear, viscous liquid
Liquid

Liquid is one of the principal states of matter. A liquid is a fluid that has the particles loose and can freely form a distinct surface at the boundaries of its bulk material....
. The properties cannot be precisely stated, because HTPB is manufactured in various grades to meet specific requirements.






Discussion
Ask a question about 'Hydroxyl-terminated polybutadiene'
Start a new discussion about 'Hydroxyl-terminated polybutadiene'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Hydroxyl-terminated polybutadiene (HTPB) is a polymer of butadiene terminated at each end with a hydroxyl
Hydroxyl

Hydroxyl in chemistry stands for a molecule consisting of an oxygen atom and a hydrogen atom connected by a covalent bond. The neutral form is a hydroxyl Radical and the hydroxyl anion is called a hydroxide....
 functional group
Functional group

In organic chemistry, functional groups are specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules....
. It belongs to a class of polymers
Polymer

A polymer is a large molecule composed of repeating structural units typically connected by covalent chemical bonds. While polymer in popular usage suggests plastic, the term actually refers to a large class of natural and synthetic materials with a variety of properties....
 known as polyol
Polyol

The name polyols refers to alcohols containing multiple hydroxyl groups. In two technological disciplines polyols have special meaning: food science and polymer chemistry....
s. It is used to react with a diisocyanate
Isocyanate

Isocyanate is the functional group of atoms ?N=C=O , not to be confused with the cyanate functional group which is arranged as ?O?C=N....
 to form a polyurethane
Polyurethane

A polyurethane, commonly abbreviated PU, is any polymer consisting of a chain of organic chemistry units joined by carbamate links. Polyurethane polymers are formed by reacting a monomer containing at least two isocyanate functional groups with another monomer containing at least two alcohol groups in the presence of a catalyst....
, a stable and easily stored synthetic material.

Physical properties

HTPB is a clear, viscous liquid
Liquid

Liquid is one of the principal states of matter. A liquid is a fluid that has the particles loose and can freely form a distinct surface at the boundaries of its bulk material....
. The properties cannot be precisely stated, because HTPB is manufactured in various grades to meet specific requirements. HTPB is thus a generic name for a class of compounds.

Uses

HTPB is used in many solid rocket
Solid rocket

A solid rocket or a solid-fuel rocket is a rocket with a motor that uses Rocket fuel#Solid propellants . The earliest rockets were solid fueled, powered by gunpowder, used by the Science and technology in China and Inventions in the Muslim world in warfare as early as the 13th century....
 motors to bind the fuel and oxidizing agent
Oxidizing agent

An oxidizing agent can be defined as either:#a chemical compound that readily transfers oxygen atoms, or#a substance that gains electrons in a redox chemical reaction...
 into a solid mass. It is also used as a hybrid rocket
Hybrid rocket

A hybrid rocket propulsion system comprises propellants of two different states of matter, the most common configuration being a rocket engine composed of a solid propellant lining a combustion chamber into which a liquid or gaseous propellant is injected so as to undergo a strong exothermic reaction to produce hot gas that is emitted throu...
 fuel. Together with N2O (nitrous oxide
Nitrous oxide

Nitrous oxide, commonly known as "laughing gas", is a chemical compound with the chemical formula Nitrogen2Oxygen. At room temperature, it is a colorless Flammability gas, with a pleasant, slightly sweet odor and taste....
, or "laughing gas") as the oxidizer, it is used to power the SpaceShipOne
SpaceShipOne

SpaceShipOne is a spaceplane that completed the first privately funded human spaceflight on June 21, 2004. It was developed by Scaled Composites....
 hybrid rocket motor developed by SpaceDev
SpaceDev

SpaceDev, a part of the "Space Systems Business" of Sierra Nevada Corporation, is prominent for its spaceflight and microsatellite work. It designed and built the hybrid rocket motors for Paul Allen's Tier One suborbital Scaled Composites SpaceShipOne space program operated by Scaled Composites....
. It also powers all 3/4 stages of the Japanese M-5 rocket
M-5 rocket

The M-V rocket, also called M-5 or Mu-5, was a Japanese solid-fuel rocket designed to launch Science satellites. It was a member of the Mu of rockets....
 satellite launchers. JAXA describe the fuel as "HTPB/AP/Al=12/68/20" which means, proportioned by mass, HTPB 12% (binder and fuel), Ammonium perchlorate
Ammonium perchlorate

Ammonium perchlorate is a chemical compound with the formula NitrogenHydrogen4ChlorineOxygen4.It is the salt of ammonia and perchloric acid....
 68% (oxidizer), and Aluminium
Aluminium

Aluminium or aluminum is a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13....
 powder, 20% (fuel).

External links

  • , from Sartomer, a manufacturer of HTPB