NDLI: Phenylethynyl endcapping reagents and reactive diluents

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Phenylethynyl endcapping reagents and reactive diluents

Content Provider	NASA Technical Reports Server (NTRS)
Copyright Year	1994
Description	A phenylethynyl composition which can be used to endcap nucleophilic species is employed in the production of phenylethynyl terminated reactive oligomers exclusively. These phenylethynyl terminated reactive oligomers display unique thermal characteristics, as exemplified by the model compound, 4-phenoxy 4'-phenylethynylbenzophenone, which is relatively stable at 200 C, but reacts at 350 C. In addition, a reactive diluent was prepared which decreases the melt viscosity of the phenylethynyl terminated oligomers and subsequently reacts therewith to increase density of the resulting thermoset. The novelty of this invention resides in the phenylethynyl composition used to terminate a nucleophilic reagent, resulting in the exclusive production of phenylethynyl terminated reactive oligomers which display unique thermal characteristics. A reactive diluent was also employed to decrease the melt viscosity of a phenylethynyl terminated reactive oligomer and to subsequently react therewith to increase the crosslink density of the resulting thermoset. These materials have features which make them attractive candidates for use as composite matrices and adhesives.
File Size	513541
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940030571
Archival Resource Key	ark:/13960/t12p0229n
Language	English
Publisher Date	1994-05-17
Access Restriction	Open
Subject Keyword	Inorganic And Physical Chemistry Viscosity Oligomers Reactivity Adhesives Crosslinking Thermosetting Resins Nucleophiles Matrix Materials Diluents Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Patent

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