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Properties of the acrylic acid polymers obtained by atmospheric pressure plasma polymerization

Domenii publicaţii > Fizica + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Ionut Topala, Nicoleta Dumitrascu, Gheorghe Popa

Editorial: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 267(2), p.442-445, 2009.


Plasma polymers of acrylic acid were obtained using an atmospheric pressure discharge system. The plasma polymerization reactor uses a dielectric barrier discharge, with the polyethylene
terephthalate dielectric acting as substrate for deposition. The plasma was characterized by
specific electrical measurements, monitoring the applied voltage and the discharge current. Based
on the spatially resolved optical emission spectroscopy, we analyzed the distribution of the
excited species in the discharge gap, specific plasma temperatures (vibrational and gas
temperatures) being calculated with the Boltzmann plot method. The properties of the plasma
polymer films were investigated by contact angle measurements, infrared and UV-Vis
spectroscopy, scanning electron microscopy. The films produced by plasma polymerization at
atmospheric pressure showed a hydrophilic character, in correlation with the strong absorbance of
OH groups in the FTIR spectrum. Moreover, the surface of the plasma polymers at micrometric
scale is smooth and free of defects without particular features.

Cuvinte cheie: Plasma Polymerization; Atmospheric Pressure Discharge; Acrylic Acid