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Plasma polymerization investigated by the substrate temperature dependence
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Personen und Körperschaften: | , |
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Titel: |
Plasma polymerization investigated by the substrate temperature dependence |
In: | Journal of Polymer Science: Polymer Chemistry Edition, 23, 1985, 1, S. 87-106 |
veröffentlicht: |
Wiley
|
Umfang: | 87-106 |
ISSN: |
0360-6376 1542-9369 |
DOI: | 10.1002/pol.1985.170230110 |
Zusammenfassung: | <jats:title>Abstract</jats:title><jats:p>Plasma polymerization of tetra fluoroethylene (TFE), perfluoro‐2‐butyl‐tetrahydrofuran (PFBTHF), ethylene, and styrene were investigated in various combinations of monomer flow rates and discharge wattages for the substrate temperature range of −50 to 80°C. The polymer deposition rates can be generally expressed by <jats:italic>k</jats:italic><jats:sub>0</jats:sub> = <jats:italic>Ae</jats:italic><jats:sup>−<jats:italic>bt</jats:italic></jats:sup>, where <jats:italic>k</jats:italic><jats:sub>0</jats:sub> is the specific deposition rate given by <jats:italic>k</jats:italic><jats:sub>0</jats:sub> = (deposition rate)/(mass flow rate of monomer), <jats:italic>A</jats:italic> is the preexponential factor representing the extrapolated value of <jats:italic>k</jats:italic><jats:sub>0</jats:sub> at zero absolute temperature, and <jats:italic>b</jats:italic> is the temperature‐dependence coefficient. It was found that the value of <jats:italic>b</jats:italic> is not dependent on the condensibility of monomer but depends largely on the group of monomer; that is, perfluorocarbons versus hydrocarbons. The values of <jats:italic>A</jats:italic> are dependent on domains of plasma polymerization. In the energy deficient region <jats:italic>A</jats:italic> is given by <jats:italic>A</jats:italic> = α(<jats:italic>W</jats:italic>/<jats:italic>FM</jats:italic>)<jats:sup><jats:italic>n</jats:italic></jats:sup>, where α is the proportionality constant, <jats:italic>W</jats:italic> is discharge wattage, <jats:italic>FM</jats:italic> is the mass flow rate, and <jats:italic>n</jats:italic> is close to unity. In the monomer deficient region <jats:italic>A</jats:italic> becomes a constant. The kinetic equation is discussed in view of the bicyclic rapid step‐growth polymerization mechanisms.</jats:p> |
Format: | E-Article |
Quelle: | Wiley (CrossRef) |
Sprache: | Englisch |