Promerus pioneered the catalyst technology that enabled addition polymerization of polynorbornenes (PNB). PNB is a class of cyclic olefin polymers (COP), which maintains the bicyclic ring structure in the backbone without the use of non-bicyclic comonomers. This allows the PNB backbone to remain rigid, resulting in glass transition temperatures (Tg) that are quite high, even >300 ̊C.
Unlike polyimides, which stiffen as they cure via ring-closing mechanism releasing volatile components at elevated cure temperatures, PNB does not require high cure temperatures in order to achieve a high Tg. Additionally, the ability to maintain high thermal characteristics with glass-like transparency is unique to the industry.
Furthermore, we can copolymerize a wide variety of norbornenes with functional groups (for adhesion, elongation, etc.) to tailor the PNB polymer to meet customer requirements. Through this unique ability to tailor PNB polymer compositions, we’re able to adjust the properties of our materials, while maintaining transparency across a broad spectrum of wavelengths.
For a look into our top materials, continue reading below.