Abstract
An efficient synthetic procedure for thephosphonation of aromatic polymers was developed and is here exemplified for polyphenylsulfine. This procedure involved the bromination of the polymer and the subsequent bromin-phosphorus exchange by means of a Pd(0)-catalyzed P-C coupling reaction. In the resulting product, the phosphonate ester pendant groups were attached to aromatic rings of the polymer chain without alkylene spacer units. A substitution degree of almost one phorphonate moiety per repeating unit of the polymer was achieved in the presence of Pd 2 (dba) 3 .CHCl 3 as catalyst at 120°C. Polymers with free phosphonic acid groups were prepared by ester hydrolysis.
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