ISSN:
0021-8995
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The free-radical polymerization of vinyl fluoride has been studied with the use of organic peroxide and azo initiators over the temperature range of 60-150°C. and at pressures of 75-1000 atm. Molecular weights of the polymers by osmotic pressure or radiotracer techniques were found to vary over the range of 45,000 to 180,000 depending on polymerization conditions employed. Stabilized high molecular weight polyvinyl fluoride may be compression-molded into tough, high-impact strength bars, or the unstabilized material may be cast into films from solvents such as dimethylformamide. The films, which may be cold drawn, are tough, brilliantly clear, and have tensile strengths near 8000 lb./in.2 They are also extremely resistant to weathering, maintaining clarity and cold drawability even after ten years' exposure in Florida.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/app.1960.070041008
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