Plasma homo- and copolymerizations of tetrafluoroethylene and chlorotrifluoroethylene
| Autor: | Morton A. Golub, Lorie S. Finney, Theodore Wydeven |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Polymers and Plastics
Analytical chemistry General Physics and Astronomy Infrared spectroscopy Plasma polymerization chemistry.chemical_compound Monomer chemistry X-ray photoelectron spectroscopy Copolymer Chemical Engineering (miscellaneous) Tetrafluoroethylene Chlorotrifluoroethylene Deposition (chemistry) |
| Zdroj: | Plasmas and Polymers. 1:173-194 |
| ISSN: | 1572-8978 1084-0184 |
| DOI: | 10.1007/bf02532825 |
| Popis: | The plasma homo- and copolymerizations of tetrafluoroethylene (TFE) and chlorotrifluoroethylene (CTFE) in a capacitively coupled tubular reactor (TR) with external electrodes were studied by means of microgravimetry and FT-IR and XPS analyses. The deposition rates for CTFE/TFE plasma copolymers, as well as the ratios of IR absorbances at 1180 and 1225 cm−1, and the XPS-derived Cl/C and F/C ratios, varied regularly with mol % CTFE in the feed, all of which results were dependent upon the rf power at which the plasma copolymerizations were conducted. The deposition rates for the plasma homopolymers of TFE (PPTFE) and CTFE (PPTCFE) depended markedly on rf power (W) and monomer molar flow rate (F). The F/C ratio for PPTFE was nearly independent of the composite parameter,W/FM (whereM is the monomer molecular weight), while for PPCTFE, the F/C ratio decreased significantly and the Cl/C ratio increased slightly with increase inW/FM. The percentage of carbon as CF3 was 20–24% in PPTFE and 7–14% in PPCTFE. Plots of deposition rate versusW/FM for PPTFE and PPCTFE obtained in a TR differed considerably from corresponding plots in the literature for the same homopolymers prepared in a glass-cross or bell-jar reactor. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink