ISSN:
0032-3888
Schlagwort(e):
Chemistry
;
Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
The character of the residues from pyrolytic decomposition of organo-phosphorus polymers has suggested the use of such materials in ablative materials required for heat shields in reentry vehicles, rocket nozzles, etc.Phosphorus-containing phenolic resol and novolak resins were prepared by condensing di(p-hydroxyphenyl)-phenyl-(phosphine oxide) with aldehydes. The mechanical properties of the basic phosphorus-phenolics were improved by internal plasticization through chemical reaction of the resin in the early stages of polycondensation with acrylonitrile-butadiene copolymers (NBR) and with silences and slicone resins. To improve the compatibility of the phosphorus phenolics with NBR copolymers, the phosphorus-containing phenolics were initially etherified by “butanolization” in order to decrease their polarity.The preparation of coatings and molded discs from some modified and unmodified phosphorus-containing phenolic-resin formulations is described. Preliminary observations relating to the properties of the trial products are reported.
Zusätzliches Material:
2 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pen.760040216
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