Figure 4. Water uptakes grafted films (gPET) and sulfonated films (sPET) films as a function soaking time

From

Properties of Proton Exchange Membranes Poly-ethylene Terephthalate (PET) Films Developed by Gamma Radiation Induced Grafting and Sulfonation Technique

Khadiza Begam, Md. AlamgirKabir, M. Mahbubur Rahman, Md. Abul Hossain, Mubarak A. Khan

Physics and Materials Chemistry. 2013, 1(2), 13-20 doi:10.12691/pmc-1-2-2