ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
In an effort to develop new and improved polymeric materials for space application, a new series of polymers has been prepared. Some of these have shown outstanding thermal stability and good stability when exposed to ultraviolet radiation in a vacuum environment. High molecular weight polymers of the general type, have been prepared by the reaction of a silyldiamine with various organic diols. Bis-(anilino)diphenylsilane has been reacted with such diols as hydroquinone, resorcinol, p,p′-biphenol, 2,7-naphthalenediol, 2,2-propane-bis(4-hydroxybenzene), 1,6-hexanediol, and 4,4′-dihydroxydiphenyl ether. Of these, the polymer containing the biphenyl linkage, polydiphenylsiloxybiphenyl, has the more desirable properties. Polydiphenylsiloxybiphenyl is stable to 600°C. for short periods of time. Fibers with fairly good tenacity, 0.5 g./den. may be drawn directly and continuously from the polymer melt. This polymer forms a hard protective coating on aluminum, remains stable after being heated at 500°C. for 60 min., and shows no change after 96 hr. at 270°C. (518°F.). It also forms good transparent semiflexible films and has good tensile strength as an ambient temperature adhesive.
Additional Material:
7 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1965.070090126
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