Joel Vargas, A. A. Santiago, R. Gaviño
2007
Citations
0
Influential Citations
9
Citations
Journal
Express Polymer Letters
Abstract
The synthesis of new N-3,5-bis(trifluoromethyl)phenyl-endo-norbornene-5,6-dicarboximide (TFMPhNDI, 2a), N-4-fluorophenyl-endo-norbornene-5,6-dicarboximide (FPhNDI, 2b) and N-2,2,6,6-tetramethylpiperidyl-endo-nor- bornene-5,6-dicarboximide (TMPNDI, 2c) monomers was carried out. Polynorbornene dicarboximides were obtained via ring opening metathesis polymerization (ROMP) using a second generation ruthenium alkylidene catalyst (1,3-dimesityl- 4,5-dihydroimidazol-2-ylidene) (PCy3Cl2Ru = CHPh) (I). Poly-TMPNDI which bears a piperidyl moiety showed the high- est Tg and Td compared to the polymers bearing fluoro-aryl moieties. Thermal stability of Poly-TFMPhNDI (3a) was enhanced after hydrogenation with Wilkinson's catalyst.