Ring-opening metathesis polymerization of vinylnorbornene and following polymer modifications

Abstract

Ring-opening metathesis polymerization of vinylnorbornene with molybdenum (VI) complex or with Hoveyda-Grubbs type Ru alkylidene complex provided soluble polymers, poly (VNBE)s of Mn about 10 000, having vinyl pendant groups on cyclopentenylenevinylene main chains. Post-polymerization modification via cross-metathesis of pen- dant vinyl groups with cis -1,4-diacetoxybut-2-ene, 5-hexenyl acetate, allyl acetoacetate, and allyltrimethylsilane was accomplished.

Functionalization of poly (VNBE) was also performed via ene-yne cross-metathesis of vinyl pendants with (4-fluorophenyl) acetylene and (2,4-difluorophenyl) acetylene.

Keywords

• poly(vinylnorbornene)
• ring-opening metathesis polymerization
• post-polymerization modification
• olefin metathesis
• ene-yne