GERALDES, ADRIANA N.ZEN, HELOISA A.RIBEIRO, GEISEFERREIRA, HENRIQUE P.SOUZA, CAMILA P.PARRA, DUCLERC F.LUGAO, ADEMAR B.2014-11-172014-11-182015-04-022014-11-172014-11-182015-04-02GERALDES, ADRIANA N.; ZEN, HELOISA A.; RIBEIRO, GEISE; FERREIRA, HENRIQUE P.; SOUZA, CAMILA P.; PARRA, DUCLERC F.; LUGAO, ADEMAR B. Post irradiation effects on the graft of poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether)(PFA) films. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE; MEETING ON NUCLEAR APPLICATIONS, 9th; MEETING ON REACTOR PHYSICS AND THERMAL HYDRAULICS, 16th; MEETING ON NUCLEAR INDUSTRY, 1st, September 27 - October 2, 2009, Rio de Janeiro, RJ. <b>Proceedings...</b> Disponível em: http://repositorio.ipen.br/handle/123456789/11956.http://repositorio.ipen.br/handle/123456789/11956Radiation induced grafting of monomers into fluorinated polymers was designed as an alternative route to polymer modification. In this work, grafting of styrene onto poly(tetrafluoroethylene-co-perfluoropropyl vinyl ether) (PFA) was studied. Radiation-induced grafting of styrene onto PFA films was investigated after simultaneous irradiation (in post-irradiation condition) using a 60Co source. The films of PFA were irradiated at 20, 40, 80 and 100 kGy doses at room temperature and chemical changes were monitored after contact with styrene for grafting. The post-irradiation time was established between 7 and 28 days when films of PFA were maintained in styrene/toluene 1:1 v/v solution at room temperature. After these periods the grafting degrees were evaluated in the samples. The highest degree of grafting was achieved after 14 days. Chemical modifications were evaluated by infrared spectroscopic analysis (FTIR), thermogravimetry (TG), differential scanning calorimetry (DSC) and also by scanning electron microscopy (SEM). The degree of grafting (DOG) was determined gravimetrically. The results showed that irradiated PFA films at 100 kGy exhibited higher grafting degree. Surface analysis by SEM technique of irradiated, grafted and original films have presented an homogeneous surface.openAccesscalorimetrychemical radiation effectscobalt 60experimental datafilmsinfrared spectrapolytetrafluoroethylenepost-irradiation examinationradiation dosesscanning electron microscopystyrenethermal gravimetric analysisTexto completo de eventohttps://orcid.org/0000-0002-1737-3191https://orcid.org/0000-0002-7626-880X