Thermally Curable Polyoxanorbornene by Ring Opening Metathesis Polymerization
Thermally Curable Polyoxanorbornene by Ring Opening Metathesis Polymerization, M. A. Tasdelen, H. Durmaz, Macromol. Chem Phys., 12, 2121-2126 (2011) DOI: 10.1002/macp.201100258
A novel norbornene monomer bearing a thermally curable benzoxazine group is synthesized and polymerized by ROMP using the Grubbs first-generation ruthenium catalyst. The Mw of the side-chain benzoxazine functionalized polyoxanorbornene can be up to 87 000 Da with unimodal molecular-weight distribution and narrow polydispersity between 1.18 and 1.65. Thermally activated ring-opening polymerization of benzoxazine moieties leads to the formation of highly cross-linked structures. The effects of molecular weight on the thermal ROP of polybenzoxazine precursors are examined.