The crystallisation behaviour of copolymers of telechelic poly(2,6-dimethyl-1,4-phenylene ether) segments with terephthalic methyl ester endgroups (PPE-2T), 13 wt% crystallisable tetra-amide segments of uniform length units (two-and-a-half repeating unit of nylon-6,T) and dodecanediol (02) was studied. The crystallisation rate of the T6T6T units was found to be very high despite the high T-g/T-m ratio. The supercooling (T-m - T-c) as measured by DSC is 18 degreesC at a cooling rate of 20 degreesC/min. WAXD has elucidated that the tetra-amide units remain organised in the melt. (C) 2004 Elsevier Ltd. All rights reserved.