A polymer of ethylene chloride and sodium poly sulphide is: (a) Thiokol (b) Melamine (c) Glyptal (d) Perlon \(\mathrm{L}\)

Ethylene chloride, also known as dichloroethane, can undergo a reaction known as polymerization, where individual molecules, called monomers, connect to form a larger molecule, or polymer. This process can be initiated by heat, light, or catalysts, and results in polymers that have a range of properties and uses based on their structure and composition.

The structure of the polymer depends on the type of monomers involved and the conditions under which polymerization occurs. In the case of ethylene chloride, the polymer formed is usually atypical and not commercially used. However, ethylene chloride can be used as a comonomer with other substances such as vinyl chloride to create more widely used polymers like PVC (polyvinyl chloride).

Sodium poly sulphide is a type of inorganic polymer containing chains of sulfur atoms. These polymers are generally synthesized by the reaction of sodium sulphide with elemental sulfur. An interesting property of sodium poly sulphide polymers is their ability to be cross-linked to form a rubbery material. Cross-linking is the process where individual polymer chains are linked together to form a three-dimensional network, resulting in a material that is less likely to flow and has improved mechanical properties.

Despite their potential, sodium poly sulphide polymers are not as common in everyday products as other types of polymers but are integral in the production of specialized polymers like thiokol rubber due to their unique characteristics such as resistance to solvents, oils, and water.

Thiokol rubber is a type of synthetic rubber that is known for its superior chemical resistance, particularly to solvents, oils, and water. It is made through the polymerization of ethylene dichloride with sodium polysulphide, forming a polymer that is also resistant to gas permeation.

Thiokol rubbers are elastomers, meaning they can return to their original shape after being stretched or deformed. This type of rubber is widely used in applications that require a high degree of impermeability and resistance to harsh chemicals, such as in gaskets, seals, and o-rings in aerospace, automotive, and chemical processing industries.

Commercial Production

Commercially, thiokol rubber is produced under controlled conditions to ensure consistent quality and properties. Its unique chemistry allows for a range of formulations that can be tailored to specific uses, making thiokol rubber an important material in many industrial applications.