ISSN:
0032-3888
Schlagwort(e):
Chemistry
;
Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The radiation-induced polymerization of n-tetradecafluoroheptene-1 was investigated at pressures of 8100, 11,900 and 17,100 atmospheres and temperatures between 90 and 267°C. The data are interpreted in terms of a free radical mechanism and the polymer has a low ceiling temperature. As temperature is increased, the depropagation step becomes important and reduces the rate of polymerization. Under some conditions transfer seems to be a significant part of the mechanism. Several radiation-induced polymerizations at high pressure were carried out with 1,1,2-trifluorovinylphenyl ether as well as one with 1,2,3,4,5-pentafluorophenyl 1,1,2-trifluorovinyl ether. The results suggest that transfer limits the molecular weight of the polymers.
Zusätzliches Material:
3 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pen.760030410
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