论文信息 - XPS studies of the ageing of plasma-treated polymer surfaces

XPS studies of the ageing of plasma-treated polymer surfaces

Polystyrene and polyethyleneterephthalate (PET) coupons were exposed to r.f. plasmas containing helium, oxygen and nitrogen. The modified surfaces were characterized by x-ray photoelectron spectroscopy shortly following plasma treatment and after storage in air for about 360 days. The oxygen concentration in polystyrene treated with plasmas for at least 30 s was found to tend to a value of 12–14% following storage. Polystyrene exposed to a helium plasma took up additional oxygen during storage, mainly in CO, OCO and OCO groups. Polystyrene exposed to a nitrogen/hydrogen plasma lost nitrogen over time but took up oxygen in single, double and multi-atom bond configurations. Polystyrene exposed to an oxygen/helium plasma lost oxygen over time, especially from pendant groups in which carbon was bonded to three oxygen atoms. The evolution of polystyrene and PET samples exposed to combinations of oxygen and nitrogen plasmas is also discussed. Copyright © 2000 John Wiley & Sons, Ltd.

R. W. Paynter | R. Paynter

[1] L. Gerenser. XPS studies of in situ plasma-modified polymer surfaces , 1993 .

[2] R. Paynter. Angle-resolved x-ray photoelectron spectroscopy studies of the evolution of plasma-treated surfaces with time , 1999 .

[3] R. Paynter. XPS Studies of the modification of polystyrene and polyethyleneterephthalate surfaces by oxygen and nitrogen plasmas , 1998 .

[4] Ernesto Occhiello,et al. On the aging of oxygen plasma-treated polydimethylsiloxane surfaces , 1990 .

[5] R. Paynter,et al. Influence of the power and pressure on the growth rate and refractive index of a-C:H thin films deposited by r.f. plasma-enhanced chemical vapour deposition , 1996 .

[6] Hydrophilic surface modification of polyethylene by plasma of nitrogen oxides , 1990 .

[7] N. McIntyre,et al. Oxidation of polyethylene surfaces by remote plasma discharge: A comparison study with alternative oxidation methods , 1990 .

[8] M. Morra,et al. Surface characterization of plasma-treated PTFE , 1990 .

[9] C. Chan,et al. Polymer surface modification by plasmas and photons , 1996 .

[10] H. Yasuda,et al. A study of surface dynamics of polymers. II. Investigation by plasma surface implantation of fluorine–containing moieties , 1988 .

[11] H. Yasuda,et al. A study of surface dynamics of polymers. III. Surface dynamic stabilization by plasma polymerization , 1988 .