The effect of hot DMSO treatment on the gamma-ray-induced grafting of acrylamide onto PET films

作者：Rahman Nazia^*; Sato Nobuhiro; Sugiyama Masaaki; Hidaka Yoshiki; Okabe Hirotaka; Hara Kazuhiro

来源：Polymer Journal, 2014, 46(7): 412-421.

DOI：10.1038/pj.2014.12

• acrylamide
• Poly(ethylene terephthalate)
• radiation grafting
• swelling agent

In the present study, the gamma-ray induced grafting of acrylamide (AAm) onto poly(ethylene terephthalate) (PET) films and the resulting changes in properties, including the Hg(II)-capturing functionality, were investigated. No grafting was observed on pristine PET films. Therefore, the films were treated with dimethyl sulfoxide (DMSO) before the gamma-ray grafting with the goal of facilitating grafting; some of the samples were pretreated at high temperature (100-160 degrees C) and showed a considerable increase in the adsorption of AAm from solution. The highest graft yield obtained in the present study was 15.5% for the DMSO specimens pretreated at 140 degrees C and gamma-ray irradiated with a 100-kGy total dose (1-kGy h(-1) dose rate) in 50 wt% AAm-monomer solutions in the presence of 1 wt% FeCl3 (polymerization inhibitor). In addition to the promotion of the graft yield, the formation of micropores in the DMSO-pretreated specimens was found during the optical microscopy investigations. This structural change is hypothesized to assist the adsorption and c-ray grafting of AAm to PET. The AAm-grafted PET films prepared using DMSO pretreatment showed high removal efficiency for Hg(II) ions, whereas the pristine PET film showed no uptake, reflecting these changes.

• 出版日期2014-7