By courtesy of:
KENJI MIYATAKE, ALLAN S. HAY
Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 39, 1854–1859 (2001)
Another article:
New Poly(arylene ether)s with Pendant Phosphonic Acid Groups
Journal of Polymer Science: Part A: Polymer Chemistry, Vol. 39, 3770–3779 (2001)