This paper deals with thermal ageing of polyaniline obtained from plasma or chemical ways. FTIR analyses suggest the formation of stable carbonyl compounds in both cases. The plasma polyaniline degrades clearly faster than its chemical analog which is discussed from structural considerations. The consequences of thermal ageing on the surface properties monitored by Water Contact Angles (WCA) are also considered and explained as the overlap of an "oxidation" component that decreases WCA and a "crosslinking" component (only observed in plasma polyaniline) responsible for the WCA increase.

Anti‐fogging coatings are deposited on the polycarbonate thanks to the low pressure pulsed plasma. Two precursors are simultaneously polymerized: One contains hydrophilic groups (2‐(dimethylamino)ethyl methacrylate or acrylic acid [AA]) whereas the other one (1 H,1 H,2H‐perfluoro‐1‐decene [HDFD]) is hydrophobic. Several proportions of (HDFD) are applied to prepare films with high hexadecane (≈70°) and low water (≤20°) contact angles. Evidence of their hydrophilic, oleophobic properties is given by the wettabillity and the anti‐fogging measurements. It appears that all plasma‐codeposits issued from AA and HDFD with high hexadecane contact angle are more oleophobic than the plasma‐copolymers 2‐(dimethylamino)ethyl methacrylate and HDFD, irrespective of the proportion of the fluorinated precursor. Such a behavior is explained by the grafting of longer perfluorinated chains. The anti‐fogging properties are not directly correlated to the wettability. Moreover, the films act as predicted by the flip flop mechanism.