What is the chain structure of Polysulfides?
In commerce, the term “polysulfide” usually refers to a class of polymers with alternating chains of several sulfur atoms and hydrocarbons. They have the formula R 1S nR 2. In this formula n indicates the number of sulfur atoms (or “rank”).
What is polysulfide used for?
Applications of Polysulfide Adhesives Master Bond polysulfides are versatile synthetic elastomers that are used in the electronic, electrical, computer, metalworking, appliance, automotive and chemical industries. They can be used in a wide range of applications, such as: Aircraft fuel tank sealants.
What does the word polysulfide mean?
Definition of polysulfide : a sulfide containing two or more atoms of sulfur in the molecule.
What is polysulfide sealant?
Polysulphide adhesives and sealants are resins that provide a flexible and chemically resistant sealing or assembly element. Single component polysulphide resins are commonly used as construction sealants.
What is the difference between polyurethane and polysulfide?
Polysulfide sealant is a type of sealant designed for joints that have to withstand prolonged immersion in liquids. Polyurethane sealant is a type of sealant having single-component elastomeric sealant properties that tend to dry at humidity and at room temperature.
What is Thiokol rubber?
Thiokol rubber is a type of artificial elastomeric, which is invariably a polymer. An elastomeric is a material with the mechanical property that it can undergo more elastic deformation under stress as compared to most materials and then return to its previous size without permanent deformation.
What is the advantage of using a polysulfide material?
Polysulfides have a long working and setting time, which is an advantage when impressions are being taken of multiple preparations, but a disadvantage when only one or two teeth have been prepared.
What is the meaning of polynuclear?
Definition of polynuclear : chemically polycyclic especially with respect to the benzene ring —used chiefly of aromatic hydrocarbons that are important as pollutants and possibly as carcinogens.
What does polycentric mean?
having more than one center
Definition of polycentric : having more than one center (as of development or control): such as. a : having several centromeres polycentric chromosomes. b : characterized by polycentrism.
Is polysulfide a plastic?
If neither component is plastic and if you want to preserve your ability to disassemble the joint, use polysulfide. Polysulfide is the most versatile of marine sealants. It is a synthetic rubber with excellent adhesive characteristics, and you can use it for almost everything.
Is polysulfide UV resistant?
The polysulfide sealing compound can adapt to a wide range of temperature (− 40 ~ 96 °C), and it has a good flexibility in low temperature, in addition it has a strong ability of ultraviolet resistance and ice, snow and water soaking resistance.
Is Morton Thiokol still in business?
An investigation found the cause was two O-ring seals in the Space Shuttle’s right solid rocket booster, which had been manufactured by Morton Thiokol….Thiokol.
| Industry | Aerospace, Manufacturing, Chemicals |
|---|---|
| Founded | December 5, 1929 |
| Defunct | 2007, succeeded by Orbital ATK; and later merged with Northrop Grumman |
