NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Interpenetrating polymer networks from acetylene terminated materialsAs part of a program to develop high temperature/high performance structural resins for aerospace applications, the chemistry and properties of a novel class of interpenetrating polymer networks (IPNs) were investigated. These IPNs consist of a simple diacetylenic compound (aspartimide) blended with an acetylene terminated arylene ether oligomer. Various compositional blends were prepared and thermally cured to evaluate the effect of crosslink density on resin properties. The cured IPNs exhibited glass transition temperatures ranging from 197 to 254 C depending upon the composition and cure temperature. The solvent resistance, fracture toughness and coefficient of thermal expansion of the cured blends were related to the crosslink density. Isothermal aging of neat resin moldings, adhesive and composite specimens showed a postcure effect which resulted in improved elevated temperature properties. The chemistry, physical and mechanical properties of these materials will be discussed.
Document ID
19900046092
Document Type
Conference Paper
Authors
Connell, J. W.
(NASA Langley Research Center Hampton, VA, United States)
Hergenrother, P. M.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Nonmetallic Materials
Distribution Limits
Public
Copyright
Other
No Preview Available