Functional ROMP‐Derived Poly(cyclopentene)s

Abstract

Abstract Functional polyolefins are prepared from poly‐CPE via ROMP by the action of a designed Ru‐alkylidene initiator followed by quantitative hydroboration with 9‐borabicyclo[3.3.1]nonane. The borylated polymers prepared in this way are then converted into hydroxy‐, amino‐, and silyloxy‐functionalized polyolefins. With increasing polarity of the substituents, the glass‐transition temperatures of the modified polymers increase significantly. Perhydrobrominated poly‐CPE is prepared from poly‐CPE and HBr and subjected to Cu(I)‐mediated ATRP‐based grafting to yield poly( tert ‐butyl acrylate)‐grafted polyethylene (PE). The synthetic routes reported here present a straightforward access to functional and polar olefins. magnified image