End‐group analysis of poly(phenyl glycidyl ether), 3. Isopropoxy and chlorine groups using 1H and 13C nuclear magnetic resonance

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AbstractNon‐hydroxylic end‐groups in the soluble fraction of poly(phenyl glycidyl ether) (PPGE) obtained with the aluminium isopropoxide (AIP)/ZnCl2 initiator system are studied using nuclear magnetic resonance (NMR) spectroscopy. To make assignments, model compounds are synthesized and several PPGEs are prepared with various initiator systems. Isopropoxy and chlorine groups are identified and quantified using NMR spectroscopy and microcoulometry, respectively. Primary and secondary carbons attached directly to OiPr and Cl are detected by NMR spectroscopy, but, as can be expected, the primary ones are more plentiful due to the fact that they come from the more probable attack in this mechanism of ring‐opening. Other unsaturated terminal groups are also investigated but their presence cannot be detected.