Polystyrene-Based Vitrimers: Inexpensive and Recyclable
Thermosets
Posted on 2020-07-09 - 21:03
We
report a straightforward and scalable method for the generation
of polystyrene-based vinylogous urethane vitrimers using conventional
radical polymerization. The copolymerization of the commercially available
and inexpensive monomers styrene and (2-acetoacetoxy)ethyl methacrylate
produced β-ketoester-functional network precursors on a multigram
scale, which could be cross-linked with diamines to yield thermally
robust vitrimer materials. Vitrimers were (re)processed over three
destruction/compression cycles with acid catalysis to overcome the
effects of backbone entanglements. Lastly, the viscoelastic properties
were investigated, revealing a higher activation energy for viscous
flow (Ea) compared with previously prepared
methacrylate-based analogs.
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Lessard, Jacob
J.; Scheutz, Georg M.; Hughes, Rhys W.; Sumerlin, Brent S. (2020). Polystyrene-Based Vitrimers: Inexpensive and Recyclable
Thermosets. ACS Publications. Collection. https://doi.org/10.1021/acsapm.0c00523