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Radiation‐induced grafting of styrene onto poly(tetrafluoroethylene) (PTFE) films. I. Effect of grafting conditions and properties of the grafted films
Author(s) -
Nasef Mohamed Mahmoud,
Saidi Hamdani,
Dessouki Ahmed Mokhtar,
EINesr Eman Mohamed
Publication year - 2000
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/(sici)1097-0126(200004)49:4<399::aid-pi393>3.0.co;2-w
Subject(s) - tetrafluoroethylene , grafting , crystallinity , materials science , styrene , fourier transform infrared spectroscopy , monomer , polymer chemistry , irradiation , etfe , copolymer , chemical engineering , nuclear chemistry , chemistry , polymer , composite material , physics , layer (electronics) , nuclear physics , engineering
Radiation‐induced grafting of styrene onto poly(tetrafluoroethylene) (PTFE) films was studied by a simultaneous irradiation technique. Grafting was carried out using γ‐radiation from a 60 Co source at dose rates of 1.32–15.0 kGy h −1 at room temperature. The effects of type of diluent, dose rate, irradiation dose, and the initial monomer concentration in the grafting solution on the degree of grafting were investigated. The degree of grafting was found to be strongly dependent upon the grafting conditions. The dependence of the initial rate of grafting on the dose rate and the initial monomer concentration in the grafting solution was found to be in the order of 0.6 and 1.7, respectively. The chemical structure and the crystallinity of the grafted PTFE films were studied by means of Fourier‐transform infrared, (FTIR), electron spectroscopy for chemical analysis (ESCA) and X‐ray diffractometry (XRD). © 2000 Society of Chemical Industry