title: Fully Aromatic High Performance Thermoset via Sydnone-Alkyne Cycloaddition.
abstract: We have developed an efficient synthetic platform for the preparation of a new class of high performance thermosets based on the 1,3-dipolar cycloaddition of a bifunctional sydnone with a trifunctional alkyne. These processable materials possess outstanding thermal stability, with Td5% of 520 °C and a weight loss of <0.1% per day at 225 °C (both in air). Key to this performance is the stability of the starting functional groups that allows for reactive B-staging via simple thermal activation to give fully aromatic and highly cross-linked polypyrazole-based thermosets.
authors.forename: Nisha V
authors.initials: NV
authors.lastname: Handa
authors.forename: Shaoguang
authors.initials: S
authors.lastname: Li
authors.affiliation: Mitsubishi Chemical USA, Inc. , Chesapeake, Virginia 23320, United States.
authors.forename: Jeffrey A
authors.initials: JA
authors.lastname: Gerbec
authors.affiliation: Mitsubishi Chemical Group Science and Technology Research Center, Inc. , Yokohama 227-8502, Japan.
authors.forename: Naoko
authors.initials: N
authors.lastname: Sumitani
authors.forename: Craig J
authors.initials: CJ
authors.lastname: Hawker
authors.affiliation: Institute of Pharmacy, Freie Universität Berlin , Königin-Luise-Str. 2-4, 14195 Berlin, Germany.
authors.forename: Daniel
authors.initials: D
authors.lastname: Klinger