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Phosphorus‐containing phenolic resins
Author(s) -
Kindley L. M.,
Filipescu N.,
Pappas E.,
Huether C.
Publication year - 1964
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760040216
Subject(s) - materials science , phosphine oxide , phosphorus , copolymer , condensation polymer , plasticizer , thermosetting polymer , polymer , organic chemistry , polymer chemistry , phosphine , chemistry , composite material , catalysis , metallurgy
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.