抄録
Polyester fiber was treated in the aqueous solution of ethylenediamine at 90°C, and the change of the properties of the fiber was investigated as well as that of the molecular weight and the amount of end groups. By the treatment, the weight of the fiber was lost, the strength and the elongation were diminished, and the moisture regain increased. The molecular weight was considerably reduced by this treatment. During the reaction, the increment of hydroxyl end groups were about the same as that of carboxly end groups. It was considered that the scission of polyester chains took place at the middle of the polymer, and both hydroxyl and carboxyl groups were produced.
