DICATIONICALLY LIVING CHAINS: COPOLYMERIZATION OF TETRAHYDROFURAN WITH PROPYLENE OXIDE AND SYNTHESIS OF THE TELECHELIC OLIGOMERS.

The living chains were obtained in the bulk copolymerization of tetrahydrofuran (THF) with propylene oxide (PO) (10-20 wt. %) initiated by adipoyl chloride (AC)-AgC10//4 ( left bracket AC right bracket //0 equals 0. 02-0. 09 mol multiplied by (times) 1** minus **1) catalyst at - 10-0 degree C without chain termination and transfer reactions. The estimation of reactivity ratios gave values of 0. 8 plus or minus 0. 2 and 0. 08 plus or minus 0. 03 for THF and PO, respectively. The functionality of living chains with 10% PO in the feed is close to 2. Four different telechelic THF-PO copolymers with amine or hydroxyl end-groups left bracket P(THF-co-PO)R, where R equals -NHBu, -NHPh, -NEt//2 or -OH right bracket were synthesized.EI04400-404