%0 Journal Article
%T Recupera£¿£¿o hidrof¨®bica de polipropileno tratado por VUV ou plasma
%A Wanke
%A Cesar H.
%A Barbosa
%A Luiz G.
%A H¨¹bner
%A J¨²lia V. M.
%A Horowitz
%A Flavio
%A Mauler
%A Raquel S.
%A Oliveira
%A Ricardo V. B. de
%J Pol¨ªmeros
%D 2012
%I Associa??o Brasileira de Pol¨ªmeros
%R 10.1590/S0104-14282012005000027
%X surface treatments using plasma and vacuum ultraviolet radiation (vuv) were used to introduce oxygen-containing functional groups in samples of polypropylene, in order to modify its wettability. atr-ftir, afm and contact angle (ca) measurements were used to analyze the chemical and physical changes on the pp surface as a function of time. the results showed changes in wettability of the vuv-treated samples mainly due to chemical modification of the surfaces. for plasma-treated samples, aging occurred faster than for the vuv-treated ones. for both treatments, a rearrangement of the polymer chains during aging has probably occurred, with possible crosslinking of surface macromolecules for the vuv-treated samples.
%K polypropylene
%K uv
%K plasma
%K aging.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0104-14282012000200010&lng=en&nrm=iso&tlng=en