Polyisobutylene
A synthetic rubber used in various applications
Polyisobutylene
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Polyisobutylene (PIB) is a synthetic rubber and a member of the polyolefin family. It is a polymer of isobutylene, a hydrocarbon that is used in a variety of applications due to its unique properties.
Properties[edit | edit source]
Polyisobutylene is known for its excellent impermeability to gases, making it an ideal material for inner tubes and vacuum sealants. It is also resistant to oxidation and ozone, which contributes to its durability and longevity in various applications.
Applications[edit | edit source]
Polyisobutylene is widely used in the automotive industry for the production of tire inner liners, which help maintain tire pressure and improve fuel efficiency. It is also used in the pharmaceutical industry as a component in transdermal patches and chewing gum bases due to its non-toxic nature.
In the construction industry, polyisobutylene is used as a sealant in double-glazed windows and as a roofing material due to its weather-resistant properties.
Production[edit | edit source]
The production of polyisobutylene involves the polymerization of isobutylene using a catalyst such as aluminum chloride. The process can be adjusted to produce different grades of polyisobutylene, ranging from low molecular weight oils to high molecular weight rubbers.
Safety and Environmental Impact[edit | edit source]
Polyisobutylene is considered to be a relatively safe material with low toxicity. However, it can pose environmental risks if not disposed of properly, as it is not biodegradable. Efforts are being made to recycle polyisobutylene and reduce its environmental footprint.
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