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Scott, Colleen N.
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article
Facile transformation of poly(phenyl ether) by C-H borylation: A viable method to new aromatic materials
Abstract
Csingle bondH functionalization is a mild method for the direct transformation of inert Csingle bondH bonds to the desired product. Herein, the Csingle bondH borylation reaction is employed to convert poly(phenyl ether) (PPE) to the borylated analog (PPE-Bpin) for further functional group transformation into other products. We explored the conversion of PPE to an adhesive (PPE-ADH) by the combination of a PPE epoxy resin (PPE-ER) and a triamine. The GPC trace shows no noticeable degradation in the polymer’s backbone following the Csingle bondH borylation and subsequent reactions. The PPE derivatives are all thermally stable with onset of degradation temperatures (Td onset) over 330 °C and degradation temperature (Td) over 400 °C; in comparison, PPE has a Td onset at 344 °C and Td of 388 °C. The white colored adhesive has a glass transition temperature (Tg) of 79 °C, with an adhesion energy of 12 kJ/m2 at room temperature due to cohesive fracture.