This contribution describes our recent efforts geared toward the use of a general, thio-bromo "click" reaction as a post-polymerization method for the preparation of flameresistant polymeric materials. a-bromo ester-containing polymers could easily be prepared using ROMP and a subsequent, facile thio-bromo click reaction was used for the installation of a phosphorus-moiety that was shown to impart flame-resistant/self-extinguishing properties to these polymers. The extent of their flame resistance was then ascertained by treating paper (previously coated with polymer) to standard burn tests as well as measuring the limiting oxygen index (LOI). V C 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018, 56, 645-652