Synthesis of two novel thermally stable classes of polynorbornene with pendant aryl ether or ester chains

Abstract

Reactions of 5-norbornene-2-methanol with arene cyclopentadienyliron complexes led to the synthesis of two new classes of norbornene monomers with ether or ester bridges ; ring-opening metathesis polymerization of these monomers using ruthenium-based catalysts gave rise to high molecular weight polymers displaying exceptional thermal stability.

Polynorbornenes Containing Ferrocene Derivatives and Alkyne‐bis(tricarbonylcobalt)

“…The ring opening metathesis polymerization (ROMP) of functionalized norbornene using Grubbs catalysts is a well documented process that is tolerant of a variety of functional groups 8–14. Our group has previously used Grubbs first generation catalyst to polymerize polynorbonenes with η 6 ‐arene‐η 5 ‐cyclopentadienyliron complexes in the side chain 15–18.…”

Cross-Linkable Fluorinated Polynorbornene with High Thermostability and Low Dielectric Constant at High Frequency

“…As illustrated in Figure , cured PNBE-TFVE displays 5% weight loss temperature ( T 5d ) of 473 °C, and exhibits a residual mass of 28.3% at 1000 °C. These results indicat that the thermostability of cured PNBE-TFVE is much better than that of PNBE based aryl ether and ester polymers . These results are probably attributed to the high cross-linking density, derived from the three cross-linkable TFVE groups within per repeat unit.…”

Synthesis of substituted norbornenes and their polymerization to polynorbornenes with flexible aliphatic side-chains

“…It was demonstrated that the type of aryl group and the length of the flexible spacer incorporated into the sidechain affect the properties of the resulting polymers 6) . We recently communicated the synthesis and characterization of two classes of polynorbornenes functionalized with pendent aryl ethers 7) . It was found that these materials displayed improved thermal stability relative to commercially available polynorbornene.…”