Abstract
A series of hydrophilic copolyesters were prepared via copolymerization method with purified terephthalic acid (PTA), ethylene glycol (EG), 5-sodium suflo bis-(hydroxyethyl) isophthalate (SIPE) as the third monomer, and different content of polyols (FMA01) as the fourth monomer. The chemical structures of the hydrophilic copolyester were described by Fourier transform infrared spectroscopy(FTIR), and the thermal properties of the samples were studied by thermogravimetric analysis(TGA) and differential scanning calorimetry(DSC). The hydrophilic properties of the samples were measured by contact angle(CA) measurements. Results showed that such modified copolymers had excellent hydrophilic properties. When SIPE reached 3mol% and FMA01 reached 0.8mol%, the copolyester film turned its wetting property to hydrophilic with water contact angle of 53.7°.
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