END-GROUP ANALYSIS OF POLY(PHENYL GLYCIDYL ETHER) .3. ISOPROPOXY AND CHLORINE GROUPS USING H-1 AND C-13 NUCLEAR-MAGNETIC-RESONANCE

Non-hydroxylic end-groups in the soluble fraction of poly(phenyl glyci dyl ether) (PPGE) obtained with the aluminium isopropoxide (AIP)/ZnCl2 initiator system are studied using nuclear magnetic resonance (NMR) s pectroscopy. 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 spectrosco py and microcoulometry, respectively. Primary and secondary carbons at tached directly to -OiPr and -Cl are detected by NMR spectroscopy, but , as can be expected, the primary ones are more plentiful due to the f act 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.