ZHANG Hong-zhi, FU Jing-guo, YANG Hui-chang, FENG Xin-de. STUDIES ON DICATIONICALLY LIVING CHAINS——SYNTHESIS OF α, ω-DIAMINO POLY(THF-b-ESTER-b-THF) TRIBLOCK CO-OLIGOMER[J]. Acta Polymerica Sinica, 1988,(1):63-66.
ZHANG Hong-zhi, FU Jing-guo, YANG Hui-chang, FENG Xin-de. STUDIES ON DICATIONICALLY LIVING CHAINS——SYNTHESIS OF α, ω-DIAMINO POLY(THF-b-ESTER-b-THF) TRIBLOCK CO-OLIGOMER[J]. Acta Polymerica Sinica, 1988,(1):63-66.DOI:
The unliving chains of aliphatic polyester were transformed into dicationically living poly-(THF-b-ester-b-THF) chains. By terminating the living chains with liquid ammonia
the α
ω-diaminotriblock co-oligomer was synthesized. This primary amine telechelic triblock modified the epoxy resin to give a toughened product with high strength which is due to the phase separation as demonstrated by viscoelastic data and scanning electron microscopy.