Preparation of Highly Hydrophilic Polyethylene Terephthalate Micropowder via Radiation Grafting Method

GUO Feng, XING Zhe, WAN Wen, WU Guozhong

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Plastics Science and Technology ›› 2025, Vol. 53 ›› Issue (02) : 43-46. DOI: 10.15925/j.cnki.issn1005-3360.2025.02.008
Theory and Research

Preparation of Highly Hydrophilic Polyethylene Terephthalate Micropowder via Radiation Grafting Method

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Abstract

Hydrophilic monomers, acrylic acid (AA) and 2-acrylamido-2-methylpropanesulfonic acid (AMPS), were successfully grafted onto the surface of polyethylene terephthalate (PET) micropowder via a radiation-induced grafting method to produce highly hydrophilic PET micropowder. The semi-dry solid mixture of PET micropowder (particle size 20 μm) and AA/AMPS was subjected to γ-irradiation under a nitrogen atmosphere with an absorbed dose of 100 kGy. The results showed that the dispersibility and hydrophilicity of the modified PET micropowder increased with the grafting rate. When the mass fraction of AA/AMPS monomers was 20% and the mass ratio of AA to AMPS was 2∶1, the grafting rate reached 15.2%, the modified PET exhibited good dispersion stability in aqueous solution, and the water contact angle decreased from 125.4° to 60.3°. Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and thermogravimetric analysis (TG) were used to confirm the successful grafting of AA/AMPS onto the surface of PET micropowder.

Key words

Polyethylene terephthalate / Acrylic acid / 2-acrylamide-2-methylpropanesulfonic acid / Hydrophilic acid / Radiation grafting

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GUO Feng , XING Zhe , WAN Wen , et al. Preparation of Highly Hydrophilic Polyethylene Terephthalate Micropowder via Radiation Grafting Method. Plastics Science and Technology. 2025, 53(02): 43-46 https://doi.org/10.15925/j.cnki.issn1005-3360.2025.02.008

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