Polyurethane acrylates(PUA) with different soft segments were synthesized by reaction of polyethylene glycol(PEG) and polytetramethylene ether glycol(PTMG) at different molecular weights with toluene-2,4-diisocyanate(TDI) and hydroxyethyl acrylate(HEA). The influence of reaction temperature on ─NCO and C═C contents as well as the molecular weight of PUA prepared with PEG600 was studied. The favorable synthesis conditions were determined as follows: 50 °C/3.5 h for the first reaction and 65 °C/2.5 h for the ...