Anti-dripping PET Fabrics Prepared by Two Steps Radiation-induced Grafting

作者：Chen, Xu; Wang, Yue; Peng, Jing; Li, Jiu-qiang; Zhai, Mao-lin^*

来源：Acta Polymerica Sinica, 2017, (4): 669-675.

DOI：10.11777/j.issn1000-3304.2017.16184

• Anti-dripping
• PET fabrics
• GMA
• DMVP
• Radiation-induced grafting

Novel anti-dripping polyethylene terephthalate (PET) fabrics were successfully prepared by two-step gamma radiation-induced grafting polymerization of glycidyl methacrylate (GMA)/divinylbenzene (DVB) and dimethyl vinylphosphonate (DMVP) onto the surface of PET fabrics. The grafting yield increased with the increase of absorbed dose; under the absorbed dose of 21 kGy and 200 kGy, it reached 105.9% and 10.2% for GMA/DVB and DMVP, respectively. Similarly, it was noted that the grafting yield increased with monomer concentration while decreased with the dose rate. Moreover, it was confirmed by FTIR, XPS and TGA analyses that PET fabrics had been successfully modified. FTIR result showed the characteristic vibration absorption peaks of epoxy group and P-O for modified PET at 905 and 1041 cm(-1), respectively. Through XPS, the characteristic peaks of phosphorus were recognized, including P2s and P2p. TGA experiment indicated that after PDMVP grafting, thermal stability of the fabric was enhanced by the introduced phosphorus and also the formed protecting carbon layer. Compared with original PET fabrics, the tensile strength of modified PET fabrics was increased by 0.79 kN/m and 0.82 kN/m for grafting of PGMA/DVB and PDMVP, and their elongation at break increased by 11.68% and 9.69%, respectively. The results indicated that the mechanical properties of modified PET fabrics were improved at a certain extent. Additionally, the performance of anti-dripping was improved remarkably after radiation modification due to the introduction of crosslinking network and phosphorus-containing PDMVP chain. The time of per droplet generation during the combustion of PET was 3.0 s/n, and that of PET-g-PGMA/DVB was 17.0 s/n; there was no droplet after further grafting of PDMVP. The morphologies of PET fabrics before and after radiation modification as well as after combustion were observed by SEM and it was found that the modified PET fabrics by grafting of PGMA/DVB and PDMVP retained the fabric structure after combustion.

• 出版日期2017-4-20
• 单位北京大学