Pyrrole → HCID 86673204, compound

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Reaction Steps

FIG. 15 shows the thermal stability results of the copolymers in TG analysis, and Table 4 shows the thermal decomposition temperatures and char yields. All tested copolymers exhibit high thermal stability, including initial decomposition temperature of above 350° C., and the temperature at the maximal weight-loss rate (i.e. thermal decomposition temperature) of above 560° C. The char yields of all tested copolymers at 1000° C. in N2 are above 83%. As the pyrene feed content increases from 0% to 100%, the char yield of the resulting polymers increases at first and slightly declines, with the maximum char yield found as 87.6% for copolymer 95/5. The maximum char yield is much higher than that of conventional carbon precursors and aromatic polymers, and is much higher than the theoretical carbon content of pyrrole monomer of 71.5% and close to the theoretical carbon content of pyrene monomer of 95.1%. The high thermal stability and very high char yields of these copolymers can be ascribed to their high aromaticity.

Provenance & Evidence