Abstract
AbstractPET 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 % = 2.1147 × t (h)0.4593]. γSP increased very much, γSd decreased a little, and consequently γS, ISWn, and the work of adhesion of water Wa increased with the increasing PEG content. γFW decreased very much, γFO increased a little, and consequently the difference between adhesion tensions of oily soil and water to the specimen (AFO–AFW) increased as the PEG content increased. The contact angle of oily soil to the specimen θO immersed in water increased and consequently θW and WFO/W decreased. Therefore, the PET fabric treated with PEG–diamine had very good water‐wicking, oily soil releasing, and antistatic properties.
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