Polyisobutyleeniä

Polyisobutyleeniä is a synthetic rubbery polymer of isobutylene. It is also known as polyisobutene or PIB. PIB is a saturated polymer, meaning it has no double bonds in its main chain. This saturation contributes to its excellent resistance to ozone, UV radiation, and heat.

The physical properties of polyisobutylene vary depending on its molecular weight. Low molecular weight PIB is a viscous liquid, while high molecular weight PIB is a solid. It is characterized by its low permeability to gases, which makes it useful in applications where airtightness is important. PIB is also known for its inertness and resistance to many chemicals.

Common applications for polyisobutylene include its use as a sealant and adhesive component, particularly in inner tubes for tires due to its low gas permeability. It is also found in chewing gum bases, lubricants, and as a viscosity modifier. In the medical field, it is used in wound dressings and as a component in some drug delivery systems. Its non-toxic nature and good barrier properties make it suitable for these diverse uses.