Poly , glow-discharge treatment

Figure 7. Adhesion of 5. epidermidis KH 11 onto polyether-urethane modified in a glow discharge treatment with different gases and acrylic acid (smaller columns adhesion after precoating of the polymer surfaces with a synthetic protein solution) where water = water contact angle of the modified poly-etherurethanes-...

Table 4.10 The effect of various glow-discharge treatments on the joint strength of poly(ether sulphone) substrates bonded with an epoxy adhesive [80]...

Monomers Not Polymerizable by Plasma Initiation. When styrene and a-methy1styrene were subjected to plasma treatment, the monomers became yellowish and only trace amounts of insoluble films were formed. The discoloration was intensified and extensive formation of dark films were observed if carbon tetrachloride was added as the solvent. No post-polymerization was detectable for these monomers. Generally styrene and a-methylstyrene readily undergo thermal polymerization. However, no thermal polymerization was possible for these monomers after having been subjected to plasma treatment for one minute or less. It has been demonstrated from the emission spectra of glow discharge plasma of benzene (6) and its derivatives (7 ) that most of the reaction intermediates are phenyl or benzyl radicals which subsequently form a variety of compounds such as acetylene, methylacetylene, allene, fulvene, biphenyl, poly(p-phenylenes) and so forth. It is possible that styrene and a-methylstyrene also behave similarly, so that species from the monomer plasma are poor initiators for polymerization. 

Effect of Atmospheric Glow Discharge Plasma Treatment on CO2 Permeability and Chemical Structure of Poly(dimethylsiloxane) Membranes... 

The effect of atmospheric pressure glow discharge (APG) plasma treatment on CO2 permeability and selectivity of poly(dimethylsiloxane) membranes was investigated in detail. The selectivity of CO 2 over CH4 was remarkably improved at low power input conditions (i.e. a few watts), and showed a maximum as a function of treatment time. The maximum CO2/CH4 selectivity obtained was 76, and the permeance of CO2... 

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