The evaluation of the surface characteristic of the PET film and fabric treated with PEG–diamine

Abstract

SynopsisPET film treated with PEG-diamine at 130°C was investigated for the aminolysis reaction and the pseudografted PEG content was measured with FTNMR. The hydrophilic properties of the PET film and fabric treated with PEG-diamine were estimated by their surface free energies, water-wicking time, oily soil releasing, and static electricity. Results obtained indicated that the PEG unit was pseudografted to the PET chain end as a result of the aminolysis reaction of the ester bond of PET by the primary amine radical of PEG-diamine. The pseudografted PET content increased with the aminolysis time [PEG wt B = 2.1147 X t (h)0.4593]. yg increased very much, y i decreased a little, and consequently ys, Z : , , and the work of adhesion of water W, increased with the increasing PEG content. yFw decreased very much, yFo increased a little, and consequently the difference between adhesion tensions of oily soil and water to the specimen (A, -A F w ) increased as the PEG content increased. The contact angle of oily soil to the specimen 8, immersed in water increased and consequently 8 , and WF0,, decreased. Therefore, the P E T fabric treated with PEG-diamine had very good water-wicking, oily soil releasing, and antistatic properties. EXPERIMENTAL MaterialThe biaxially drawn PET film, whose thickness and intrinsic viscosity are 24 pm and 0.8988, respectively, was used. It was kindly supplied from Sun

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